Sometimes you need to modify your HTML to work around differences in browsers and operating systems. And sometimes you need to do something that HTML just doesn't do ...
JavaScript can run on any device that has a JavaScript Runtime Environment (JRE). The heart of the JRE is the JS Engine — a piece of software (not hardware) that interprets and executes JavaScript.
easy to explain, and each part plays a well-defined role. A typical real program grows organically. New pieces of functionality are added as new needs come up. Structuring—and preserving structure—is ...
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