Created
January 13, 2015 14:39
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ES6: Iterating over a NodeList
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| var elements = document.querySelectorAll("div"), | |
| callback = (el) => { console.log(el); }; | |
| // Spread operator | |
| [...elements].forEach(callback); | |
| // Array.from() | |
| Array.from(elements).forEach(callback); | |
| // for...of statement | |
| for (var div of elements) callback(div); |
Unfortunately Chrome (46 at the time of this writing) doesn't support for...of iteration on NodeLists.
In chrome 51 you can just do elements.forEach(callback)
Array.from(elements, callback)
You also can add custom iterator
elements[Symbol.iterator]();
elements.forEach(callback)
[].forEach.call(elements, callback)
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Unsurprisingly,
for...ofis approximately twice as fast as the two other approaches.