Escape \u200b (zero Width Space) And Other Illegal Javascript Characters
I have a set of JavaScript objects I bootstrap to a backend template to initialise my Backbone.js collections on page load. It looks something like this (as Twig template):
Solution 1:
If the character only appears inside strings, either escaped as \u200b or as literals, you should be fine. They're only illegal as identifiers. And even as identifiers, you could still use them as object property names, if you use subscript notation (obj["aaa\u200b"] = "foo"); at least in Chrome, but I'm not sure how safe/compatible that is.
Look at a few example that seem to work:
var escaped = "aaa \u200b bbb";
var unescaped = "bbb ccc";
console.log(escaped.charCodeAt(4));
console.log(unescaped.charCodeAt(4));
var obj = {};
obj[escaped] = "foo";
obj[unescaped] = "bar";
console.log(obj[escaped]);
console.log(obj[unescaped]);
console.log(obj["aaa \u200b bbb"]);
console.log(obj["bbb ccc"]);
http://codepen.io/anon/pen/JqjEK
You might also be interested on this Q/A I wrote a while ago: No visible cause for "Unexpected token ILLEGAL"
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