Chrome浏览器中的for-of循环

Question

Firefox browser console is returning the expected answer. But when I run the below code in Chrome console it is returning back Unexpected token [ . Version of my Chrome browser is 44, while map and for...of methods are compatible from version 38. Why does the Chrome console cause an error?

var map = new Map();
map.set(3, "Fizz");
map.set(5, "Buzz");
for (var [key, value] of map.entries()) {
    if (6 % key == 0) console.log(key);
}

Answer 1

Use ScratchJS , Google Chrome does not seem to support all ECMA6. You are right for...of should be supported and it is indeed supported. What is not supported is the unpacking of values. Check the compatibility table at the index destructuring, assignement , only Chrome 49 seems to have partial support for it.

If you try to remove the unpacking it will work.

 var map = new Map();
 map.set(3, "Fizz");
 map.set(5, "Buzz");
 for (var value of map.entries()) {
    console.log(value[0]);
 }