René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Object destructuring assignment does not work for variables initialized previously","articleBody":"\u003c!-- Love javascript-obfuscator? Please consider supporting our collective:\r\n👉  https://opencollective.com/javascript-obfuscator/donate --\u003e\r\n\r\n\u003c!--- Provide a general summary of the issue in the Title above --\u003e\r\n\r\n## Expected Behavior\r\nVariable assignment without declaration when using object destructuring should work.\r\n\r\nAccording to [destructuring assignment in MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment#Object_destructuring)\r\n\r\n\u003e {a, b} = {a: 1, b: 2} is not valid stand-alone syntax, as the {a, b} on the left-hand side is considered a block and not an object literal.\r\n\u003e \r\n\u003e However, ({a, b} = {a: 1, b: 2}) is valid, as is var {a, b} = {a: 1, b: 2}\r\n\r\n\u003c!--- If you're describing a bug, tell us what should happen --\u003e\r\n\u003c!--- If you're suggesting a change/improvement, tell us how it should work --\u003e\r\n\r\n## Current Behavior\r\nCurrently the variable name on left-hand side part of the statement is not being changed by the obfuscator while the initial variable declaration is.\r\n\r\nThis is the obfuscator output for the function below:\r\n```\r\nfunctiontest(_0x4bb6ab){\r\n\tlet_0x44c2ed=undefined;if(!![]){\r\n\t\t({\r\n\t\t\ta // \u003c- notice how a is not obfuscated\r\n\t\t}=_0x4bb6ab);\r\n\t}console[_0x1b95('0x0')](_0x44c2ed);\r\n}\r\n```\r\n\u003c!--- If describing a bug, tell us what happens instead of the expected behavior --\u003e\r\n\u003c!--- If suggesting a change/improvement, explain the difference from current behavior --\u003e\r\n\r\n## Steps to Reproduce (for bugs)\r\n\u003c!--- Provide a link to a live example, or an unambiguous set of steps to --\u003e\r\n\u003c!--- reproduce this bug. Include code to reproduce, if relevant --\u003e\r\n1. Simply run the obfuscator for the code example given below\r\n2.\r\n3.\r\n4.\r\n\r\n## Your Environment\r\n\u003c!--- Include as many relevant details about the environment you experienced the bug in --\u003e\r\n* Obfuscator version used: 0.18.1\r\n* Node version used: 8.2.1 (although it does matter)\r\n\r\n# Stack trace\r\n\u003c!--- Include stack trace --\u003e\r\n\r\n## Minimal working example that will help to reproduce issue\r\n\u003c!--- Include code --\u003e\r\n```\r\nfunction test(obj) {\r\n    let a = undefined;\r\n    if(true){\r\n        ({a} = obj);\r\n    }\r\n    console.log(a);\r\n    // this should print 1, running the same example after the obfuscation prints undefined\r\n}\r\n\r\ntest({a: 1});\r\n```\r\n","author":{"url":"https://github.com/skiritsis","@type":"Person","name":"skiritsis"},"datePublished":"2018-12-13T12:00:19.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/361/javascript-obfuscator/issues/361"}