There's an old trick (that I learned on SO) to catch calling a constructor as a function, i.e. forgetting the new keyword. The following, or something like, it goes in each constructor at the top.  if (!(this instanceof arguments.callee)) {     t...
In strict mode, indirect calls to eval should have this bound to the global object in eval code.     10.4.2: In Edition 5, indirect calls to the eval function use the global environment as both the variable environment and lexical environment for the...
Is there anyway to check if strict mode 'use strict' is enforced , and we want to execute different code for strict mode and other code for non-strict mode.  Looking for function like isStrictMode();//boolean...
I'm using babel-loader in webpack with a custom babel-plugin to transform some thirdparty code into a format that passes through Webpack's bundler without trouble. However, when my code runs through babel's parser (babylon) to build the A...
Can someone give me advice with this. I just started using jslint and I got an error message "strict violation" pointing to the line with "dialog(this)" -   function accessLinkClick(e) {     e.preventDefault();     $('.accessLink&...
I have one very simply question to ask: Is it a good practice to wrap code inside an IIFE whenever I intend on using "use strict" ?    Now, I do understand the usefulness of Scope Closure (answered here and here) or probably better yet, the u...
So I've looked all over Stack Overflow and found similar questions, but couldn't find one that I could apply to mine.  I'm in strict mode, and I have defined a variable (loaded = false), and trying to do an if/else statement based on wher...
The first one works as expected:  var f1 = Object.getOwnPropertyNames(Function)     .forEach(function(element) {          console.log (typeof Function[element]);     });  //  --> number, string, function   The second one outputs an error message:...
I cannot figure it out, why do some browsers allow the next code, and others do not:  'use strict'; (function() {   Number = 1;   toString = 1;   valueOf = 1; })(); console.log(Number); console.log(toString); console.log(valueOf);    Chrome 5...
Why is escape characters not allowed in javascript strict mode?    "use strict";  var y = \010; //Uncaught SyntaxError: Unexpected token ILLEGAL <h1>Check browser console for errors</h1>...

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