Message from JavaScript discussions

May 2017

— Or, it did not work, actually... the vm doesn't apply strict mode properly so i will try again in a REPL

—

Language:

js

Source:

'use strict';
(function(a) {
  console.log(arguments);
})(1, 2);

(function(a) {
  'use strict';
  console.log(arguments);
})(1, 2);

Result:

{ '0': 1, '1': 2 }
{ '0': 1, '1': 2 }

— Hmm, I thought arguments wasn't available in strict

— I am specifically checking if variable declarations without var or other prefix throw an error, which they should in strict mode

— Ah

— That's a good way

— In the browser VM this code does not run in strict mode

"use strict";
function myFunc () {
    b = 456;
}
myFunc();

— What about with use strict inside the function?

— No effect

— Which browser?

— Chrome

— That's weird