Detect for...of Loop Support in JavaScript

Question

Is this possible? Example:

var parts = [1,2,3,4,5];
for (part of parts) {
    console.debug(part);
}

I want to detect if doing this is possible.

Also, http://kangax.github.io/es5-compat-table/es6/. [Source](https://github.com/kangax/es5-compat-table/blob/1b978c9403b281e3c6bbdbcee2b6f1eda561cd07/es6/index.html#L409-L417). — Jonathan Lonowski, Aug 17 '13 at 01:41
If you hover over the (C) icon in the table @JonathanLonowski links to, it shows the source of his test for that feature. — Heretic Monkey, Aug 17 '13 at 01:48

score 9 · Accepted Answer · answered Aug 17 '13 at 01:47

You can always try-catch such stuff. But you need eval as well, as some javascript engines will bail with a SyntaxError early.

try {
  eval("for (var i of []);");
  console.log("yep");
} catch(ex) {
  console.log("nope");
}

Tested in Firefox ("yep") and Chrome ("nope").

1 Answers1