feat(es/minifier): Detect type of .length (#6120)

**Description:**

This PR updates minifier to detect the type of `xxx.length` if possible.

crates/swc/tests/vercel/full-compact/d3-color/1/output/index.js

@@ -1 +1 @@
-import t from"@swc/helpers/src/_instanceof.mjs";import{Color as i,rgbConvert as e,Rgb as h}from"./color.js";var r=Math.PI/180,n=180/Math.PI,s=-1.78277*.29227-.1347134789;export default function o(i,r,o,a){return 1===arguments.length?function(i){if(t(i,Cubehelix))return new Cubehelix(i.h,i.s,i.l,i.opacity);t(i,h)||(i=e(i));var r=i.r/255,o=i.g/255,a=i.b/255,u=(s*a+-1.7884503806*r-3.5172982438*o)/(s+-1.7884503806-3.5172982438),c=a-u,l=-((1.97294*(o-u)- -.29227*c)/.90649),p=Math.sqrt(l*l+c*c)/(1.97294*u*(1-u)),f=p?Math.atan2(l,c)*n-120:NaN;return new Cubehelix(f<0?f+360:f,p,u,i.opacity)}(i):new Cubehelix(i,r,o,null==a?1:a)}export function Cubehelix(t,i,e,h){this.h=+t,this.s=+i,this.l=+e,this.opacity=+h}!function(t,i,e){t.prototype=i.prototype=e,e.constructor=t}(Cubehelix,o,function(t,i){var e=Object.create(t.prototype);for(var h in i)e[h]=i[h];return e}(i,{brighter:function(t){return t=null==t?1.4285714285714286:Math.pow(1.4285714285714286,t),new Cubehelix(this.h,this.s,this.l*t,this.opacity)},darker:function(t){return t=null==t?.7:Math.pow(.7,t),new Cubehelix(this.h,this.s,this.l*t,this.opacity)},rgb:function(){var t=isNaN(this.h)?0:(this.h+120)*r,i=+this.l,e=isNaN(this.s)?0:this.s*i*(1-i),n=Math.cos(t),s=Math.sin(t);return new h(255*(i+e*(-.14861*n+1.78277*s)),255*(i+e*(-.29227*n+-.90649*s)),255*(i+e*(1.97294*n)),this.opacity)}}));
+import t from"@swc/helpers/src/_instanceof.mjs";import{Color as i,rgbConvert as e,Rgb as h}from"./color.js";var r=Math.PI/180,n=180/Math.PI,s=-1.78277*.29227-.1347134789;export default function o(i,r,o,a){return 1==arguments.length?function(i){if(t(i,Cubehelix))return new Cubehelix(i.h,i.s,i.l,i.opacity);t(i,h)||(i=e(i));var r=i.r/255,o=i.g/255,a=i.b/255,u=(s*a+-1.7884503806*r-3.5172982438*o)/(s+-1.7884503806-3.5172982438),c=a-u,l=-((1.97294*(o-u)- -.29227*c)/.90649),p=Math.sqrt(l*l+c*c)/(1.97294*u*(1-u)),f=p?Math.atan2(l,c)*n-120:NaN;return new Cubehelix(f<0?f+360:f,p,u,i.opacity)}(i):new Cubehelix(i,r,o,null==a?1:a)}export function Cubehelix(t,i,e,h){this.h=+t,this.s=+i,this.l=+e,this.opacity=+h}!function(t,i,e){t.prototype=i.prototype=e,e.constructor=t}(Cubehelix,o,function(t,i){var e=Object.create(t.prototype);for(var h in i)e[h]=i[h];return e}(i,{brighter:function(t){return t=null==t?1.4285714285714286:Math.pow(1.4285714285714286,t),new Cubehelix(this.h,this.s,this.l*t,this.opacity)},darker:function(t){return t=null==t?.7:Math.pow(.7,t),new Cubehelix(this.h,this.s,this.l*t,this.opacity)},rgb:function(){var t=isNaN(this.h)?0:(this.h+120)*r,i=+this.l,e=isNaN(this.s)?0:this.s*i*(1-i),n=Math.cos(t),s=Math.sin(t);return new h(255*(i+e*(-.14861*n+1.78277*s)),255*(i+e*(-.29227*n+-.90649*s)),255*(i+e*(1.97294*n)),this.opacity)}}));

crates/swc/tests/vercel/full/d3-color/1/output/index.js

@@ -4,7 +4,7 @@ import { Color as e, rgbConvert as s, Rgb as r, darker as n, brighter as o } fro
 import { deg2rad as a, rad2deg as u } from "./math.js";
 var l = -1.78277 * 0.29227 - 0.1347134789;
 export default function c(i, h, e, n) {
-    return 1 === arguments.length ? function(i) {
+    return 1 == arguments.length ? function(i) {
         if (t(i, Cubehelix)) return new Cubehelix(i.h, i.s, i.l, i.opacity);
         t(i, r) || (i = s(i));
         var h = i.r / 255, e = i.g / 255, n = i.b / 255, o = (l * n + -1.7884503806 * h - 3.5172982438 * e) / (l + -1.7884503806 - 3.5172982438), a = n - o, c = -((1.97294 * (e - o) - -0.29227 * a) / 0.90649), p = Math.sqrt(c * c + a * a) / (1.97294 * o * (1 - o)), f = p ? Math.atan2(c, a) * u - 120 : NaN;

crates/swc_ecma_minifier/src/alias/mod.rs

@@ -1,14 +1,13 @@
 #![allow(clippy::needless_update)]
 
 use rustc_hash::FxHashSet;
-use swc_atoms::js_word;
 use swc_common::{collections::AHashSet, SyntaxContext};
 use swc_ecma_ast::*;
 use swc_ecma_utils::{collect_decls, BindingCollector};
 use swc_ecma_visit::{noop_visit_type, Visit, VisitWith};
 
 use self::ctx::Ctx;
-use crate::marks::Marks;
+use crate::{marks::Marks, util::is_global_var_with_pure_property_access};
 
 mod ctx;
 
@@ -109,17 +108,8 @@ impl InfectionCollector<'_> {
         }
 
         if self.unresolved_ctxt == Some(e.1) {
-            match e.0 {
+            if is_global_var_with_pure_property_access(&e.0) {
-                js_word!("JSON")
+                return;
-                | js_word!("Array")
-                | js_word!("String")
-                | js_word!("Object")
-                | js_word!("Number")
-                | js_word!("BigInt")
-                | js_word!("Boolean")
-                | js_word!("Math")
-                | js_word!("Error") => return,
-                _ => {}
             }
         }
 

crates/swc_ecma_minifier/src/compress/optimize/sequences.rs

@@ -20,13 +20,14 @@ use crate::{
     alias::{collect_infects_from, AccessKind, AliasConfig},
     compress::{
         optimize::{unused::PropertyAccessOpts, util::replace_id_with_expr},
-        util::{
+        util::{is_directive, is_ident_used_by, replace_expr},
-            is_directive, is_global_var_with_pure_property_access, is_ident_used_by, replace_expr,
-        },
     },
     mode::Mode,
     option::CompressOptions,
-    util::{idents_used_by, idents_used_by_ignoring_nested, ExprOptExt, ModuleItemExt},
+    util::{
+        idents_used_by, idents_used_by_ignoring_nested, is_global_var_with_pure_property_access,
+        ExprOptExt, ModuleItemExt,
+    },
 };
 
 /// Methods related to the option `sequences`. All methods are noop if

crates/swc_ecma_minifier/src/compress/optimize/unused.rs

@@ -7,11 +7,8 @@ use super::Optimizer;
 #[cfg(feature = "debug")]
 use crate::debug::dump;
 use crate::{
-    compress::{
+    compress::optimize::util::extract_class_side_effect, mode::Mode, option::PureGetterOption,
-        optimize::util::extract_class_side_effect, util::is_global_var_with_pure_property_access,
+    util::is_global_var_with_pure_property_access,
-    },
-    mode::Mode,
-    option::PureGetterOption,
 };
 
 #[derive(Debug, Default, Clone, Copy)]

crates/swc_ecma_minifier/src/compress/pure/misc.rs

@@ -9,9 +9,12 @@ use swc_ecma_utils::{
 };
 
 use super::Pure;
-use crate::compress::{
+use crate::{
-    pure::strings::{convert_str_value_to_tpl_cooked, convert_str_value_to_tpl_raw},
+    compress::{
-    util::{is_global_var_with_pure_property_access, is_pure_undefined},
+        pure::strings::{convert_str_value_to_tpl_cooked, convert_str_value_to_tpl_raw},
+        util::is_pure_undefined,
+    },
+    util::is_global_var_with_pure_property_access,
 };
 
 impl Pure<'_> {

crates/swc_ecma_minifier/src/compress/util/mod.rs

@@ -735,51 +735,6 @@ impl VisitMut for UnreachableHandler {
     }
 }
 
-pub(super) fn is_global_var_with_pure_property_access(s: &str) -> bool {
-    matches!(
-        s,
-        "console"
-            | "clearInterval"
-            | "clearTimeout"
-            | "setInterval"
-            | "setTimeout"
-            | "btoa"
-            | "Boolean"
-            | "Date"
-            | "decodeURI"
-            | "decodeURIComponent"
-            | "encodeURI"
-            | "encodeURIComponent"
-            | "escape"
-            | "eval"
-            | "Error"
-            | "EvalError"
-            | "Function"
-            | "isFinite"
-            | "isNaN"
-            | "JSON"
-            | "parseFloat"
-            | "parseInt"
-            | "RegExp"
-            | "RangeError"
-            | "ReferenceError"
-            | "SyntaxError"
-            | "TypeError"
-            | "unescape"
-            | "URIError"
-            | "atob"
-            | "globalThis"
-            | "String"
-            | "Object"
-            | "Array"
-            | "Number"
-            | "NaN"
-            | "Symbol"
-            | "Promise"
-            | "Math"
-    )
-}
-
 // TODO: remove
 pub(crate) fn contains_super<N>(body: &N) -> bool
 where

crates/swc_ecma_minifier/src/util/mod.rs

@@ -1,7 +1,7 @@
 use std::time::Instant;
 
 use rustc_hash::FxHashSet;
-use swc_atoms::js_word;
+use swc_atoms::{js_word, JsWord};
 use swc_common::{util::take::Take, Mark, Span, Spanned, DUMMY_SP};
 use swc_ecma_ast::*;
 use swc_ecma_utils::{ModuleItemLike, StmtLike, Value};
@@ -12,6 +12,57 @@ pub(crate) mod size;
 pub(crate) mod sort;
 pub(crate) mod unit;
 
+pub(crate) fn is_global_var_with_pure_property_access(s: &JsWord) -> bool {
+    match *s {
+        js_word!("JSON")
+        | js_word!("Array")
+        | js_word!("String")
+        | js_word!("Object")
+        | js_word!("Number")
+        | js_word!("Date")
+        | js_word!("BigInt")
+        | js_word!("Boolean")
+        | js_word!("Math")
+        | js_word!("Error") => return true,
+        _ => {}
+    }
+
+    matches!(
+        &**s,
+        "console"
+            | "clearInterval"
+            | "clearTimeout"
+            | "setInterval"
+            | "setTimeout"
+            | "btoa"
+            | "decodeURI"
+            | "decodeURIComponent"
+            | "encodeURI"
+            | "encodeURIComponent"
+            | "escape"
+            | "eval"
+            | "EvalError"
+            | "Function"
+            | "isFinite"
+            | "isNaN"
+            | "JSON"
+            | "parseFloat"
+            | "parseInt"
+            | "RegExp"
+            | "RangeError"
+            | "ReferenceError"
+            | "SyntaxError"
+            | "TypeError"
+            | "unescape"
+            | "URIError"
+            | "atob"
+            | "globalThis"
+            | "NaN"
+            | "Symbol"
+            | "Promise"
+    )
+}
+
 ///
 pub(crate) fn make_number(span: Span, value: f64) -> Expr {
     trace_op!("Creating a numeric literal");

crates/swc_ecma_minifier/tests/benches-full/d3.js

@@ -1323,7 +1323,7 @@
         return (o instanceof Color || (o = color(o)), o) ? (o = o.rgb(), new Rgb(o.r, o.g, o.b, o.opacity)) : new Rgb;
     }
     function rgb(r, g, b, opacity) {
-        return 1 === arguments.length ? rgbConvert(r) : new Rgb(r, g, b, null == opacity ? 1 : opacity);
+        return 1 == arguments.length ? rgbConvert(r) : new Rgb(r, g, b, null == opacity ? 1 : opacity);
     }
     function Rgb(r, g, b, opacity) {
         this.r = +r, this.g = +g, this.b = +b, this.opacity = +opacity;
@@ -1349,7 +1349,7 @@
         return s ? (h = r === max ? (g - b) / s + (g < b) * 6 : g === max ? (b - r) / s + 2 : (r - g) / s + 4, s /= l < 0.5 ? max + min : 2 - max - min, h *= 60) : s = l > 0 && l < 1 ? 0 : h, new Hsl(h, s, l, o.opacity);
     }
     function hsl(h, s, l, opacity) {
-        return 1 === arguments.length ? hslConvert(h) : new Hsl(h, s, l, null == opacity ? 1 : opacity);
+        return 1 == arguments.length ? hslConvert(h) : new Hsl(h, s, l, null == opacity ? 1 : opacity);
     }
     function Hsl(h, s, l, opacity) {
         this.h = +h, this.s = +s, this.l = +l, this.opacity = +opacity;
@@ -1416,7 +1416,7 @@
         return r === g && g === b ? x = z = y : (x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / 0.96422), z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / 0.82521)), new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
     }
     function lab(l, a, b, opacity) {
-        return 1 === arguments.length ? labConvert(l) : new Lab(l, a, b, null == opacity ? 1 : opacity);
+        return 1 == arguments.length ? labConvert(l) : new Lab(l, a, b, null == opacity ? 1 : opacity);
     }
     function Lab(l, a, b, opacity) {
         this.l = +l, this.a = +a, this.b = +b, this.opacity = +opacity;
@@ -1440,7 +1440,7 @@
         return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
     }
     function hcl(h, c, l, opacity) {
-        return 1 === arguments.length ? hclConvert(h) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
+        return 1 == arguments.length ? hclConvert(h) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
     }
     function Hcl(h, c, l, opacity) {
         this.h = +h, this.c = +c, this.l = +l, this.opacity = +opacity;
@@ -1474,7 +1474,7 @@
     }));
     var BC_DA = -1.78277 * 0.29227 - 0.1347134789;
     function cubehelix(h, s, l, opacity) {
-        return 1 === arguments.length ? function(o) {
+        return 1 == arguments.length ? function(o) {
             if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
             o instanceof Rgb || (o = rgbConvert(o));
             var r = o.r / 255, g = o.g / 255, b = o.b / 255, l = (BC_DA * b + -1.7884503806 * r - 3.5172982438 * g) / (BC_DA + -1.7884503806 - 3.5172982438), bl = b - l, k = -((1.97294 * (g - l) - -0.29227 * bl) / 0.90649), s = Math.sqrt(k * k + bl * bl) / (1.97294 * l * (1 - l)), h = s ? Math.atan2(k, bl) * degrees - 120 : NaN;
@@ -4020,7 +4020,7 @@
     }
     function dsvParse(parse) {
         return function(input, init, row) {
-            return 2 === arguments.length && "function" == typeof init && (row = init, init = void 0), text(input, init).then(function(response) {
+            return 2 == arguments.length && "function" == typeof init && (row = init, init = void 0), text(input, init).then(function(response) {
                 return parse(response, row);
             });
         };
@@ -6394,7 +6394,7 @@
     }
     var defaultSource$1 = Math.random, uniform = function sourceRandomUniform(source) {
         function randomUniform(min, max) {
-            return min = null == min ? 0 : +min, max = null == max ? 1 : +max, 1 === arguments.length ? (max = min, min = 0) : max -= min, function() {
+            return min = null == min ? 0 : +min, max = null == max ? 1 : +max, 1 == arguments.length ? (max = min, min = 0) : max -= min, function() {
                 return source() * max + min;
             };
         }
@@ -6873,7 +6873,7 @@
     var t0$1 = new Date, t1$1 = new Date;
     function newInterval(floori, offseti, count, field) {
         function interval(date) {
-            return floori(date = 0 === arguments.length ? new Date : new Date(+date)), date;
+            return floori(date = 0 == arguments.length ? new Date : new Date(+date)), date;
         }
         return interval.floor = function(date) {
             return floori(date = new Date(+date)), date;
@@ -9324,7 +9324,7 @@
             return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
         }, drag;
     }, exports1.dragDisable = dragDisable, exports1.dragEnable = yesdrag, exports1.dsv = function(delimiter, input, init, row) {
-        3 === arguments.length && "function" == typeof init && (row = init, init = void 0);
+        3 == arguments.length && "function" == typeof init && (row = init, init = void 0);
         var format = dsvFormat(delimiter);
         return text(input, init).then(function(response) {
             return format.parse(response, row);
@@ -10079,7 +10079,7 @@
     }, exports1.isoFormat = formatIso, exports1.isoParse = parseIso, exports1.json = function(input, init) {
         return fetch(input, init).then(responseJson);
     }, exports1.lab = lab, exports1.lch = function(l, c, h, opacity) {
-        return 1 === arguments.length ? hclConvert(l) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
+        return 1 == arguments.length ? hclConvert(l) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
     }, exports1.least = function(values, compare = ascending) {
         let min;
         let defined = !1;

crates/swc_ecma_minifier/tests/benches-full/jquery.js

@@ -3042,7 +3042,7 @@
             return this.on(types, selector, data, fn);
         },
         undelegate: function(selector, types, fn) {
-            return 1 === arguments.length ? this.off(selector, "**") : this.off(types, selector || "**", fn);
+            return 1 == arguments.length ? this.off(selector, "**") : this.off(types, selector || "**", fn);
         },
         hover: function(fnOver, fnOut) {
             return this.mouseenter(fnOver).mouseleave(fnOut || fnOver);

crates/swc_ecma_minifier/tests/benches-full/moment.js

@@ -1161,7 +1161,7 @@
         return string;
     }
     proto.add = add, proto.calendar = function(time, formats) {
-        if (1 === arguments.length) {
+        if (1 == arguments.length) {
             if (arguments[0]) {
                 var input, input1, arrayTest, dataTypeTest;
                 if (input = arguments[0], isMoment(input) || isDate(input) || isString(input) || isNumber(input) || (arrayTest = isArray(input1 = input), dataTypeTest = !1, arrayTest && (dataTypeTest = 0 === input1.filter(function(item) {

crates/swc_ecma_minifier/tests/benches-full/victory.js

@@ -947,7 +947,7 @@
                 return (o instanceof Color || (o = color(o)), o) ? (o = o.rgb(), new Rgb(o.r, o.g, o.b, o.opacity)) : new Rgb;
             }
             function rgb(r, g, b, opacity) {
-                return 1 === arguments.length ? rgbConvert(r) : new Rgb(r, g, b, null == opacity ? 1 : opacity);
+                return 1 == arguments.length ? rgbConvert(r) : new Rgb(r, g, b, null == opacity ? 1 : opacity);
             }
             function Rgb(r, g, b, opacity) {
                 this.r = +r, this.g = +g, this.b = +b, this.opacity = +opacity;
@@ -973,7 +973,7 @@
                 return s ? (h = r === max ? (g - b) / s + (g < b) * 6 : g === max ? (b - r) / s + 2 : (r - g) / s + 4, s /= l < 0.5 ? max + min : 2 - max - min, h *= 60) : s = l > 0 && l < 1 ? 0 : h, new Hsl(h, s, l, o.opacity);
             }
             function hsl(h, s, l, opacity) {
-                return 1 === arguments.length ? hslConvert(h) : new Hsl(h, s, l, null == opacity ? 1 : opacity);
+                return 1 == arguments.length ? hslConvert(h) : new Hsl(h, s, l, null == opacity ? 1 : opacity);
             }
             function Hsl(h, s, l, opacity) {
                 this.h = +h, this.s = +s, this.l = +l, this.opacity = +opacity;
@@ -1041,7 +1041,7 @@
             });
             var _define_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("../../../node_modules/d3-color/src/define.js"), _color_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__("../../../node_modules/d3-color/src/color.js"), _math_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__("../../../node_modules/d3-color/src/math.js"), BC_DA = -1.78277 * 0.29227 - 0.1347134789;
             function cubehelix(h, s, l, opacity) {
-                return 1 === arguments.length ? function(o) {
+                return 1 == arguments.length ? function(o) {
                     if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
                     o instanceof _color_js__WEBPACK_IMPORTED_MODULE_1__.Rgb || (o = Object(_color_js__WEBPACK_IMPORTED_MODULE_1__.rgbConvert)(o));
                     var r = o.r / 255, g = o.g / 255, b = o.b / 255, l = (BC_DA * b + -1.7884503806 * r - 3.5172982438 * g) / (BC_DA + -1.7884503806 - 3.5172982438), bl = b - l, k = -((1.97294 * (g - l) - -0.29227 * bl) / 0.90649), s = Math.sqrt(k * k + bl * bl) / (1.97294 * l * (1 - l)), h = s ? Math.atan2(k, bl) * _math_js__WEBPACK_IMPORTED_MODULE_2__.rad2deg - 120 : NaN;
@@ -1130,7 +1130,7 @@
                 return new Lab(l, 0, 0, null == opacity ? 1 : opacity);
             }
             function lab(l, a, b, opacity) {
-                return 1 === arguments.length ? labConvert(l) : new Lab(l, a, b, null == opacity ? 1 : opacity);
+                return 1 == arguments.length ? labConvert(l) : new Lab(l, a, b, null == opacity ? 1 : opacity);
             }
             function Lab(l, a, b, opacity) {
                 this.l = +l, this.a = +a, this.b = +b, this.opacity = +opacity;
@@ -1154,10 +1154,10 @@
                 return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
             }
             function lch(l, c, h, opacity) {
-                return 1 === arguments.length ? hclConvert(l) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
+                return 1 == arguments.length ? hclConvert(l) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
             }
             function hcl(h, c, l, opacity) {
-                return 1 === arguments.length ? hclConvert(h) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
+                return 1 == arguments.length ? hclConvert(h) : new Hcl(h, c, l, null == opacity ? 1 : opacity);
             }
             function Hcl(h, c, l, opacity) {
                 this.h = +h, this.c = +c, this.l = +l, this.opacity = +opacity;
@@ -5640,7 +5640,7 @@
             __webpack_require__.r(__webpack_exports__), __webpack_require__.d(__webpack_exports__, "default", function() {
                 return function newInterval(floori, offseti, count, field) {
                     function interval(date) {
-                        return floori(date = 0 === arguments.length ? new Date : new Date(+date)), date;
+                        return floori(date = 0 == arguments.length ? new Date : new Date(+date)), date;
                     }
                     return interval.floor = function(date) {
                         return floori(date = new Date(+date)), date;

crates/swc_ecma_minifier/tests/benches-full/vue.js

@@ -341,7 +341,7 @@
         var dep = new Dep(), property = Object.getOwnPropertyDescriptor(obj, key);
         if (!property || !1 !== property.configurable) {
             var getter = property && property.get, setter = property && property.set;
-            (!getter || setter) && 2 === arguments.length && (val = obj[key]);
+            (!getter || setter) && 2 == arguments.length && (val = obj[key]);
             var childOb = !shallow && observe(val);
             Object.defineProperty(obj, key, {
                 enumerable: !0,

crates/swc_ecma_minifier/tests/fixture/issues/2257/full/output.js

@@ -3816,7 +3816,7 @@
             var global = __webpack_require__(19514);
             module.exports = function(a, b) {
                 var console1 = global.console;
-                console1 && console1.error && (1 === arguments.length ? console1.error(a) : console1.error(a, b));
+                console1 && console1.error && (1 == arguments.length ? console1.error(a) : console1.error(a, b));
             };
         },
         40969: function(module, __unused_webpack_exports, __webpack_require__) {

crates/swc_ecma_minifier/tests/fixture/issues/d3-color/1/output.js

@@ -3,7 +3,7 @@ import { Color, rgbConvert, Rgb, darker, brighter } from "./color.js";
 import { deg2rad, rad2deg } from "./math.js";
 var BC_DA = -1.78277 * 0.29227 - 0.1347134789;
 export default function cubehelix(h, s, l, opacity) {
-    return 1 === arguments.length ? function(o) {
+    return 1 == arguments.length ? function(o) {
         if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
         o instanceof Rgb || (o = rgbConvert(o));
         var r = o.r / 255, g = o.g / 255, b = o.b / 255, l = (BC_DA * b + -1.7884503806 * r - 3.5172982438 * g) / (BC_DA + -1.7884503806 - 3.5172982438), bl = b - l, k = -((1.97294 * (g - l) - -0.29227 * bl) / 0.90649), s = Math.sqrt(k * k + bl * bl) / (1.97294 * l * (1 - l)), h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;

crates/swc_ecma_minifier/tests/fixture/issues/d3-time-format/3/output.js

@@ -13,7 +13,7 @@
             var locale, bisector = __webpack_require__(24852), src_ticks = __webpack_require__(73002), t0 = new Date(), t1 = new Date();
             function newInterval(floori, offseti, count, field) {
                 function interval(date) {
-                    return floori(date = 0 === arguments.length ? new Date() : new Date(+date)), date;
+                    return floori(date = 0 == arguments.length ? new Date() : new Date(+date)), date;
                 }
                 return interval.floor = function(date) {
                     return floori(date = new Date(+date)), date;

crates/swc_ecma_minifier/tests/fixture/issues/moment/1/output.js

@@ -1160,7 +1160,7 @@
         return string;
     }
     proto.add = add, proto.calendar = function(time, formats) {
-        if (1 === arguments.length) {
+        if (1 == arguments.length) {
             if (arguments[0]) {
                 var input, arrayTest, dataTypeTest;
                 (input = arguments[0], isMoment(input) || isDate(input) || isString(input) || isNumber(input) || (arrayTest = isArray(input), dataTypeTest = !1, arrayTest && (dataTypeTest = 0 === input.filter(function(item) {

crates/swc_ecma_minifier/tests/fixture/next/33265/static/chunks/d6e1aeb5-38a8d7ae57119c23/output.js

@@ -7596,7 +7596,7 @@
                         }, this.trigger = function(type) {
                             var callbacks, i, length, args;
                             if (callbacks = listeners[type]) {
-                                if (2 === arguments.length) for(i = 0, length = callbacks.length; i < length; ++i)callbacks[i].call(this, arguments[1]);
+                                if (2 == arguments.length) for(i = 0, length = callbacks.length; i < length; ++i)callbacks[i].call(this, arguments[1]);
                                 else {
                                     for(args = [], i = arguments.length, i = 1; i < arguments.length; ++i)args.push(arguments[i]);
                                     for(i = 0, length = callbacks.length; i < length; ++i)callbacks[i].apply(this, args);
@@ -13341,7 +13341,7 @@
                     }, _proto.trigger = function(type) {
                         var callbacks = this.listeners[type];
                         if (callbacks) {
-                            if (2 === arguments.length) for(var length = callbacks.length, i = 0; i < length; ++i)callbacks[i].call(this, arguments[1]);
+                            if (2 == arguments.length) for(var length = callbacks.length, i = 0; i < length; ++i)callbacks[i].call(this, arguments[1]);
                             else for(var args = Array.prototype.slice.call(arguments, 1), _length = callbacks.length, _i = 0; _i < _length; ++_i)callbacks[_i].apply(this, args);
                         }
                     }, _proto.dispose = function() {

crates/swc_ecma_minifier/tests/fixture/next/33265/static/chunks/pages/index-cb36c1bf7f830e3c/output.js

@@ -2348,7 +2348,7 @@
                 }, _proto.trigger = function(type) {
                     var callbacks = this.listeners[type];
                     if (callbacks) {
-                        if (2 === arguments.length) for(var length = callbacks.length, i = 0; i < length; ++i)callbacks[i].call(this, arguments[1]);
+                        if (2 == arguments.length) for(var length = callbacks.length, i = 0; i < length; ++i)callbacks[i].call(this, arguments[1]);
                         else for(var args = Array.prototype.slice.call(arguments, 1), _length = callbacks.length, _i = 0; _i < _length; ++_i)callbacks[_i].apply(this, args);
                     }
                 }, _proto.dispose = function() {
@@ -3826,7 +3826,7 @@
             var document1 = __webpack_require__(9144), _objCreate = Object.create || function() {
                 function F() {}
                 return function(o) {
-                    if (1 !== arguments.length) throw Error("Object.create shim only accepts one parameter.");
+                    if (1 != arguments.length) throw Error("Object.create shim only accepts one parameter.");
                     return F.prototype = o, new F();
                 };
             }();
@@ -5413,7 +5413,7 @@
                 return this;
             }, Buffer.prototype.toString = function() {
                 var length = this.length;
-                return 0 === length ? "" : 0 === arguments.length ? utf8Slice(this, 0, length) : slowToString.apply(this, arguments);
+                return 0 === length ? "" : 0 == arguments.length ? utf8Slice(this, 0, length) : slowToString.apply(this, arguments);
             }, Buffer.prototype.toLocaleString = Buffer.prototype.toString, Buffer.prototype.equals = function(b) {
                 if (!Buffer.isBuffer(b)) throw TypeError("Argument must be a Buffer");
                 return this === b || 0 === Buffer.compare(this, b);

crates/swc_ecma_minifier/tests/fixture/next/feedback-util-promisify/chunks/pages/_app-72ad41192608e93a/output.js

@@ -433,7 +433,7 @@
                             return this;
                         }, Buffer.prototype.toString = function() {
                             var e = this.length;
-                            return 0 === e ? "" : 0 === arguments.length ? utf8Slice(this, 0, e) : slowToString.apply(this, arguments);
+                            return 0 === e ? "" : 0 == arguments.length ? utf8Slice(this, 0, e) : slowToString.apply(this, arguments);
                         }, Buffer.prototype.toLocaleString = Buffer.prototype.toString, Buffer.prototype.equals = function(e) {
                             if (!Buffer.isBuffer(e)) throw TypeError("Argument must be a Buffer");
                             return this === e || 0 === Buffer.compare(this, e);

crates/swc_ecma_minifier/tests/fixture/next/react-pdf-renderer/output.js

@@ -15505,7 +15505,7 @@
                         function k(e, t, r, a) {
                             if ("function" != typeof t) {
                                 if (g(t)) return t.test(e);
-                                if (2 === arguments.length) throw new l("expected", [
+                                if (2 == arguments.length) throw new l("expected", [
                                     "Function",
                                     "RegExp"
                                 ], t);
@@ -15580,7 +15580,7 @@
                         }
                         function P(e, t, r, i) {
                             if ("string" == typeof r) {
-                                if (4 === arguments.length) throw new l("error", [
+                                if (4 == arguments.length) throw new l("error", [
                                     "Object",
                                     "Error",
                                     "Function",
@@ -16108,13 +16108,13 @@
                             });
                         }
                         function M(e, t, r, o, l, c) {
-                            if (5 === arguments.length) {
+                            if (5 == arguments.length) {
                                 c = Object.keys(e);
                                 var f = Object.keys(t);
                                 if (c.length !== f.length) return !1;
                             }
                             for(var h = 0; h < c.length; h++)if (!d(t, c[h])) return !1;
-                            if (r && 5 === arguments.length) {
+                            if (r && 5 == arguments.length) {
                                 var y = s(e);
                                 if (0 !== y.length) {
                                     var g = 0;
@@ -18313,7 +18313,7 @@
                         }, f.prototype._error = function(e) {
                             this.strm.msg && (e = this.strm.msg), this.onerror(e, this.err), this.write_in_progress = !1, this.pending_close && this.close();
                         }, f.prototype.init = function(e, r, n, i, a) {
-                            o(4 === arguments.length || 5 === arguments.length, "init(windowBits, level, memLevel, strategy, [dictionary])"), o(e >= 8 && e <= 15, "invalid windowBits"), o(r >= -1 && r <= 9, "invalid compression level"), o(n >= 1 && n <= 9, "invalid memlevel"), o(i === t.Z_FILTERED || i === t.Z_HUFFMAN_ONLY || i === t.Z_RLE || i === t.Z_FIXED || i === t.Z_DEFAULT_STRATEGY, "invalid strategy"), this._init(r, e, n, i, a), this._setDictionary();
+                            o(4 == arguments.length || 5 == arguments.length, "init(windowBits, level, memLevel, strategy, [dictionary])"), o(e >= 8 && e <= 15, "invalid windowBits"), o(r >= -1 && r <= 9, "invalid compression level"), o(n >= 1 && n <= 9, "invalid memlevel"), o(i === t.Z_FILTERED || i === t.Z_HUFFMAN_ONLY || i === t.Z_RLE || i === t.Z_FIXED || i === t.Z_DEFAULT_STRATEGY, "invalid strategy"), this._init(r, e, n, i, a), this._setDictionary();
                         }, f.prototype.params = function() {
                             throw Error("deflateParams Not supported");
                         }, f.prototype.reset = function() {
@@ -20227,7 +20227,7 @@
                             return this;
                         }, u.prototype.toString = function() {
                             var e = this.length;
-                            return 0 === e ? "" : 0 === arguments.length ? b(this, 0, e) : h.apply(this, arguments);
+                            return 0 === e ? "" : 0 == arguments.length ? b(this, 0, e) : h.apply(this, arguments);
                         }, u.prototype.toLocaleString = u.prototype.toString, u.prototype.equals = function(e) {
                             if (!u.isBuffer(e)) throw TypeError("Argument must be a Buffer");
                             return this === e || 0 === u.compare(this, e);
@@ -20596,7 +20596,7 @@
                             return e;
                         }
                         function c() {
-                            if (!this.fired) return (this.target.removeListener(this.type, this.wrapFn), this.fired = !0, 0 === arguments.length) ? this.listener.call(this.target) : this.listener.apply(this.target, arguments);
+                            if (!this.fired) return (this.target.removeListener(this.type, this.wrapFn), this.fired = !0, 0 == arguments.length) ? this.listener.call(this.target) : this.listener.apply(this.target, arguments);
                         }
                         function f(e, t, r) {
                             var n = {
@@ -20699,8 +20699,8 @@
                         }, o.prototype.off = o.prototype.removeListener, o.prototype.removeAllListeners = function(e) {
                             var t, r, n;
                             if (void 0 === (r = this._events)) return this;
-                            if (void 0 === r.removeListener) return 0 === arguments.length ? (this._events = Object.create(null), this._eventsCount = 0) : void 0 !== r[e] && (0 == --this._eventsCount ? this._events = Object.create(null) : delete r[e]), this;
+                            if (void 0 === r.removeListener) return 0 == arguments.length ? (this._events = Object.create(null), this._eventsCount = 0) : void 0 !== r[e] && (0 == --this._eventsCount ? this._events = Object.create(null) : delete r[e]), this;
-                            if (0 === arguments.length) {
+                            if (0 == arguments.length) {
                                 var i, o = Object.keys(r);
                                 for(n = 0; n < o.length; ++n)"removeListener" !== (i = o[n]) && this.removeAllListeners(i);
                                 return this.removeAllListeners("removeListener"), this._events = Object.create(null), this._eventsCount = 0, this;

crates/swc_ecma_minifier/tests/fixture/next/wrap-contracts/output.js

@@ -9096,7 +9096,7 @@
                 return this;
             }, Buffer.prototype.toString = function() {
                 const length = this.length;
-                return 0 === length ? '' : 0 === arguments.length ? utf8Slice(this, 0, length) : slowToString.apply(this, arguments);
+                return 0 === length ? '' : 0 == arguments.length ? utf8Slice(this, 0, length) : slowToString.apply(this, arguments);
             }, Buffer.prototype.toLocaleString = Buffer.prototype.toString, Buffer.prototype.equals = function(b) {
                 if (!Buffer.isBuffer(b)) throw TypeError('Argument must be a Buffer');
                 return this === b || 0 === Buffer.compare(this, b);
@@ -11604,7 +11604,7 @@
                 return target;
             }
             function onceWrapper() {
-                if (!this.fired) return (this.target.removeListener(this.type, this.wrapFn), this.fired = !0, 0 === arguments.length) ? this.listener.call(this.target) : this.listener.apply(this.target, arguments);
+                if (!this.fired) return (this.target.removeListener(this.type, this.wrapFn), this.fired = !0, 0 == arguments.length) ? this.listener.call(this.target) : this.listener.apply(this.target, arguments);
             }
             function _onceWrap(target, type, listener) {
                 var state = {
@@ -11727,8 +11727,8 @@
             }, EventEmitter.prototype.off = EventEmitter.prototype.removeListener, EventEmitter.prototype.removeAllListeners = function(type) {
                 var listeners, events, i;
                 if (void 0 === (events = this._events)) return this;
-                if (void 0 === events.removeListener) return 0 === arguments.length ? (this._events = Object.create(null), this._eventsCount = 0) : void 0 !== events[type] && (0 == --this._eventsCount ? this._events = Object.create(null) : delete events[type]), this;
+                if (void 0 === events.removeListener) return 0 == arguments.length ? (this._events = Object.create(null), this._eventsCount = 0) : void 0 !== events[type] && (0 == --this._eventsCount ? this._events = Object.create(null) : delete events[type]), this;
-                if (0 === arguments.length) {
+                if (0 == arguments.length) {
                     var key, keys = Object.keys(events);
                     for(i = 0; i < keys.length; ++i)'removeListener' !== (key = keys[i]) && this.removeAllListeners(key);
                     return this.removeAllListeners('removeListener'), this._events = Object.create(null), this._eventsCount = 0, this;

crates/swc_ecma_minifier/tests/projects/output/jquery-1.9.1.js

@@ -614,7 +614,7 @@
             return this;
         },
         removeClass: function(value) {
-            var classes, elem, cur, clazz, j, i = 0, len = this.length, proceed = 0 === arguments.length || "string" == typeof value && value;
+            var classes, elem, cur, clazz, j, i = 0, len = this.length, proceed = 0 == arguments.length || "string" == typeof value && value;
             if (jQuery.isFunction(value)) return this.each(function(j) {
                 jQuery(this).removeClass(value.call(this, j, this.className));
             });
@@ -1099,7 +1099,7 @@
             return this.on(types, selector, data, fn);
         },
         undelegate: function(selector, types, fn) {
-            return 1 === arguments.length ? this.off(selector, "**") : this.off(types, selector || "**", fn);
+            return 1 == arguments.length ? this.off(selector, "**") : this.off(types, selector || "**", fn);
         },
         trigger: function(type, data) {
             return this.each(function() {

crates/swc_ecma_minifier/tests/projects/output/jquery.mobile-1.4.2.js

@@ -392,7 +392,7 @@
         },
         option: function(key, value) {
             var parts, curOption, i, options = key;
-            if (0 === arguments.length) return $2.widget.extend({}, this.options);
+            if (0 == arguments.length) return $2.widget.extend({}, this.options);
             if ("string" == typeof key) {
                 if (options = {}, key = (parts = key.split(".")).shift(), parts.length) {
                     for(i = 0, curOption = options[key] = $2.widget.extend({}, this.options[key]); i < parts.length - 1; i++)curOption[parts[i]] = curOption[parts[i]] || {}, curOption = curOption[parts[i]];

crates/swc_ecma_minifier/tests/projects/output/underscore-1.5.2.js

@@ -506,9 +506,8 @@
         "\u2029": "u2029"
     }, escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g;
     _.template = function(text, data, settings) {
-        settings = _.defaults({}, settings, _.templateSettings);
         var render, matcher = RegExp([
-            (settings.escape || noMatch).source,
+            ((settings = _.defaults({}, settings, _.templateSettings)).escape || noMatch).source,
             (settings.interpolate || noMatch).source,
             (settings.evaluate || noMatch).source
         ].join("|") + "|$", "g"), index = 0, source = "__p+='";

crates/swc_ecma_utils/src/lib.rs

@@ -1067,13 +1067,31 @@ pub trait ExprExt {
     fn get_type(&self) -> Value<Type> {
         let expr = self.as_expr();
 
-        match *expr {
+        match expr {
             Expr::Assign(AssignExpr {
                 ref right,
                 op: op!("="),
                 ..
             }) => right.get_type(),
 
+            Expr::Member(MemberExpr {
+                obj,
+                prop:
+                    MemberProp::Ident(Ident {
+                        sym: js_word!("length"),
+                        ..
+                    }),
+                ..
+            }) => match &**obj {
+                Expr::Array(ArrayLit { .. })
+                | Expr::Lit(Lit::Str(..))
+                | Expr::Ident(Ident {
+                    sym: js_word!("arguments"),
+                    ..
+                }) => Known(Type::Num),
+                _ => Unknown,
+            },
+
             Expr::Seq(SeqExpr { ref exprs, .. }) => exprs
                 .last()
                 .expect("sequence expression should not be empty")