33 lines
718 B
Markdown
33 lines
718 B
Markdown
---
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title: bindAll
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tags: object,function,intermediate
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---
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Binds methods of an object to the object itself, overwriting the existing method.
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- Use `Array.prototype.forEach()` to iterate over the given `fns`.
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- Return a function for each one, using `Function.prototype.apply()` to apply the given context (`obj`) to `fn`.
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```js
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const bindAll = (obj, ...fns) =>
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fns.forEach(
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fn => (
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(f = obj[fn]),
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(obj[fn] = function() {
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return f.apply(obj);
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})
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)
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);
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```
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```js
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var view = {
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label: 'docs',
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click: function() {
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console.log('clicked ' + this.label);
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}
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};
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bindAll(view, 'click');
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document.body.addEventListener('click', view.click); // Log 'clicked docs' when clicked.
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```
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