How to rewrite or change the js default function. For example. Substr is a predefined function in javascript. I want to change it to return some other result.
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1yes, you can. have you tried anything? – Nina Scholz Feb 29 '20 at 09:53
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Add part of the code that you have written and you the function that you want to override – Vala Khosravi Feb 29 '20 at 10:06
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Can you share what you have tried so far? This helps others to help you better. – Utsav Patel Feb 29 '20 at 10:16
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Does this answer your question? [Override function in JavaScript](https://stackoverflow.com/questions/11542192/override-function-in-javascript) – Utsav Patel Feb 29 '20 at 10:19
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1`String.prototype.substr = () => {console.log('i am overridden')}` – glinda93 Feb 29 '20 at 13:56
1 Answers
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Sounds like you are talking about prototypes:
String.prototype.show = function() {
alert(this);
};
"Hello!".show(); // Hello!
Reece Casey
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