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I am kinda new to js and would appreciate some help to clarify one subject. Basically i want to call some functions that i write like default javascript are called:

//declaring function
const splitAsExample = text => text.split('|')

//calling function
splitAsExample('Yesterday|Today|Tomorrow')

Instead of calling the function as mentioned above, i would like to know if it's possible to make a function that can be called like:

'Yesterday|Today|Tomorrow'.splitAsExample()

//and || or
'Yesterday|Today|Tomorrow'.splitAsExample

I learned js all by myself and didn't manage to find a specific name for this question to search up in google. :) If you can clarify this topic for me it would be great, but if you could give me the name to search it up would be even better!

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  • Add it to the prototype of String String.prototype.splitAsExample Commented Aug 31, 2020 at 10:56
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    'Yesterday|Today|Tomorrow'.splitAsExample() would be possible but you would have to mess with the prototype of the builtin String object: How does JavaScript .prototype work? Commented Aug 31, 2020 at 10:57

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You could add a prototype function to String.

This allows method chaining with a given object.

String.prototype.splitAsExample = function () { return this.split('|'); };

console.log('Yesterday|Today|Tomorrow'.splitAsExample());

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1 Comment

"You could..." - But there's almost always a better way instead of modifying the prototype of a builtin object like String

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