ECMAScript 6循环在Microsoft Edge中进行

Question

It looks like a problem with ECMAScript 6 loop 'for-of' in Microsoft Edge. In fact, when i loop with a [key, value] pair, Edge return this error : SCRIPT1010: Expected identifier

For example with the code below :

 var myMap = new Map(); myMap.set(0, 'zero'); myMap.set(1, 'one'); for (var [key, value] of myMap.entries()) { console.log(key + ' = ' + value); } 

The part of code is from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#Iterating_Maps_with_for..of

And i use Edge 25.10586.0.0 to test it.

Any idea?

Answer 1

I found that [key, value] pair in the loop return an error in old version of Microsoft Edge (<= 25.10586). It needs to use an array instead like this :

 var myMap = new Map(); myMap.set(0, 'zero'); myMap.set(1, 'one'); for(var pair of myMap.entries()) { console.log(pair[0]+ ', '+ pair[1]); }