{ "type": "Script", "span": { "start": 0, "end": 26, "ctxt": 0 }, "body": [ { "type": "ExpressionStatement", "span": { "start": 0, "end": 13, "ctxt": 0 }, "expression": { "type": "StringLiteral", "span": { "start": 0, "end": 12, "ctxt": 0 }, "value": "use strict", "hasEscape": false, "kind": { "type": "normal", "containsQuote": true } } }, { "type": "ExpressionStatement", "span": { "start": 14, "end": 26, "ctxt": 0 }, "expression": { "type": "UnaryExpression", "span": { "start": 14, "end": 25, "ctxt": 0 }, "operator": "delete", "argument": { "type": "MemberExpression", "span": { "start": 21, "end": 25, "ctxt": 0 }, "object": { "type": "Identifier", "span": { "start": 21, "end": 22, "ctxt": 0 }, "value": "a", "optional": false }, "property": { "type": "Computed", "span": { "start": 22, "end": 25, "ctxt": 0 }, "expression": { "type": "Identifier", "span": { "start": 23, "end": 24, "ctxt": 0 }, "value": "b", "optional": false } } } } } ], "interpreter": null }