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I was wondering why JavaScript has such a confusing API. It is not consistent across browsers, there is a different way to get the value from each type of form input, and it is unforgiving of mistakes. jQuery has changed my life because its API is so much easier. Why did the creators of JavaScript not set up the API like that in the first place?
The JavaScript API, itself, is consistent between browsers (and is defined by ECMA, though originally developed by Netscape). The difference between browsers is the document object model (DOM). The DOM was developed independently by the different browsers, originally IE and Netscape, but now IE, Mozilla and others. The W3C has joined to try to consolidate the differences and create a common standard. For backward compatibility, the old differences remain. And, yes, jQuery has gone a long way toward making the DOM easier.