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JavaScript


/* Is JavaScript really object-oriented? */

Window.scrollX


window.scrollX is not cross-browser; 66 words added, 1 words removed

Window.scrollY


window.scrollY is not cross-browser; 65 words added

Array.prototype.indexOf()


JavaScript 1.4 is relevant to some, as long as any device or old browser version exists. It's backward Compatibility section! Contain your ego please.

Array.prototype.indexOf()


The "in" operator requires Javascript 1.4, whereas "this[from] !== undefined" works in earlier versions