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Discussion on: "Let me wait-for-it and call you back", said wait-for-it.js

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ivan_jrmc profile image
Ivan Jeremic • • Edited

Can you explain this JavaScript to me in your source code?

cb = observeNodes[selector].pop();
cb();
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I never saw that you can call something that is eighter a variable or a function, why not

const cb = observeNodes[selector].pop();
cb();
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Also is this library usable for React? Or only Vanilla JS?

Thanks

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cstayyab profile image
Muhammad Tayyab Sheikh • • Edited

A reference to function is being stored in observerNode[selector] and pop is being used to get that reference and store into cb (callback) hence when you call cb it actually calls that function. And yes it is a very valid syntax in JavaScript.

I have only tested it fir Vanilla JS