Created
December 30, 2017 19:11
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Proper way to preserve "this"?
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| class ExampleClass{ | |
| constructor(a){ | |
| this.a = a; | |
| } | |
| someMethod(){ | |
| const outerThis = this; | |
| someOtherMethod(function(b){ | |
| outerThis.a = b; | |
| }); | |
| } | |
| } |
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it is valid, and has been done this way before arrow functions were invented. arrow functions don't bind a this accessor, and therefore an outer this would not be shadowed.
someOtherMethod(b=>this.a=b); // they are often used as delegates .. in fact you can, and possibly should use them anywhere you wouldn't use object binding