diff --git a/cli/options.js b/cli/options.js
index e10ae1e..f6377e0 100644
--- a/cli/options.js
+++ b/cli/options.js
@@ -16,6 +16,7 @@ function options(args) {
'videos',
'inlinemin',
'preserve-comments',
+ 'iesafe',
],
string: [ // options
'encoding',
diff --git a/docs/usage.txt b/docs/usage.txt
index b8ffa8d..b4f74f5 100644
--- a/docs/usage.txt
+++ b/docs/usage.txt
@@ -10,6 +10,7 @@
-n, --nocompress don't compress CSS or HTML - useful for debugging
-i, --noimages don't encode images - keeps files size small, but more requests
-m, --inlinemin inline minified files
+ --iesafe safe JS compression for older IE 6/7/8
--videos encode videos (and their poster image) - disabled by default
--nosvg don't compress SVG (through SVGO)
--skip-absolute-urls don't inline links with absolute URLs
diff --git a/lib/defaults.js b/lib/defaults.js
index ea69389..d98dfd0 100644
--- a/lib/defaults.js
+++ b/lib/defaults.js
@@ -7,5 +7,6 @@ module.exports = function () {
nosvg: false, // by default, DO compress SVG with SVGO
skipAbsoluteUrls: false,
preserveComments: false,
+ iesafe: false,
};
};
diff --git a/lib/javascript.js b/lib/javascript.js
index 415dce8..01e1166 100644
--- a/lib/javascript.js
+++ b/lib/javascript.js
@@ -4,6 +4,8 @@ var debug = require('debug')('inliner');
var UglifyJS = require('uglify-js');
function uglify(source) {
+ var notIESafe = !this.options.iesafe;
+
this.emit('progress', 'compressing javascript');
source = source.trim();
@@ -20,6 +22,13 @@ function uglify(source) {
try {
result = UglifyJS.minify(source, {
fromString: true,
+ // must set screw_ie8 for each option group
+ // https://github.com/mishoo/UglifyJS2/issues/1204#issuecomment-234714094
+ // jscs:disable requireCamelCaseOrUpperCaseIdentifiers
+ compress: { screw_ie8: notIESafe },
+ mangle: { screw_ie8: notIESafe },
+ output: { screw_ie8: notIESafe },
+ // jscs:enable requireCamelCaseOrUpperCaseIdentifiers
}).code;
} catch (e) {
// failed to uglify, just return it plain
diff --git a/test/fixtures/script-ie.js b/test/fixtures/script-ie.js
new file mode 100644
index 0000000..db5187b
--- /dev/null
+++ b/test/fixtures/script-ie.js
@@ -0,0 +1,5 @@
+function doit() {
+ var foo = {default:'bar'};
+ // default is a reserved word which breaks parsing in IE<=8
+ return foo.default;
+}
diff --git a/test/fixtures/script-iesafe.opts.json b/test/fixtures/script-iesafe.opts.json
new file mode 100644
index 0000000..ca174fd
--- /dev/null
+++ b/test/fixtures/script-iesafe.opts.json
@@ -0,0 +1,3 @@
+{
+ "iesafe": true
+}
diff --git a/test/fixtures/script-iesafe.result.html b/test/fixtures/script-iesafe.result.html
new file mode 100644
index 0000000..296e230
--- /dev/null
+++ b/test/fixtures/script-iesafe.result.html
@@ -0,0 +1 @@
+ iesafe
diff --git a/test/fixtures/script-iesafe.src.html b/test/fixtures/script-iesafe.src.html
new file mode 100644
index 0000000..8f35437
--- /dev/null
+++ b/test/fixtures/script-iesafe.src.html
@@ -0,0 +1,10 @@
+
+
+
+
+ iesafe
+
+
+
+
+
diff --git a/test/fixtures/script-ieunsafe.result.html b/test/fixtures/script-ieunsafe.result.html
new file mode 100644
index 0000000..c27bc66
--- /dev/null
+++ b/test/fixtures/script-ieunsafe.result.html
@@ -0,0 +1 @@
+ ieunsafe
diff --git a/test/fixtures/script-ieunsafe.src.html b/test/fixtures/script-ieunsafe.src.html
new file mode 100644
index 0000000..580e6d8
--- /dev/null
+++ b/test/fixtures/script-ieunsafe.src.html
@@ -0,0 +1,10 @@
+
+
+
+
+ ieunsafe
+
+
+
+
+