JavaScript prototype lifecycle

Question

If I want to add the isEmpty method for all JavaScript arrays, I would use the following code

Array.prototype.isEmpty = function() {
  return this.length == 0;
}

Suppose this code is in the file foo.js. If I want isEmpty to be available on all pages of a website, would I need to include foo.js in all HTML files? In other words, should prototypes get "reset" when the user goes to another page?

Thanks Don

Answer 1

Yes, you need to include your code when loading each page.

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Answer 2

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Answer 3

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