在 Chrome DevTools-Console 的评估中，“push”是什么意思？

Question

When I evaluate one specific variable in Chrome DevTools - Console , this is the result:

(3) [Array(2), Array(2), Array(2), push: ƒ]

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I know the f means, the array contains a function.

What does the word push stand for in this context?

Answer 1

It means that someone has added a custom property to the array. It's not the standard Array.prototype.push , it's something else.

 const arr = [1, 2]; arr.push = () => 'some custom implementation'; console.log(arr);

If the standard .push was there, it wouldn't be showing up in the console.

(Try to avoid this in professional code. It's weird.)