JavaScript Bible, 7th Edition by Danny Goodman

By Danny Goodman

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Validate, Validate, Validate You can save yourself hours of debugging by checking to make sure your HTML is valid. If your markup is flawed, chances are your JavaScript and CSS will not work as expected, because they both depend on HTML elements (tags) and their attributes. The more closely your markup matches the industry-standard specs, the more likely it is that you’ll get consistent results across browsers that are all approaching the holy grail of web standards conformance. You should always proofread your own code, of course, but an automated validation tool helps for large, complicated pages, and for programmers who are still learning all the rules for correct markup.

Doing so facilitates cleaner development, faster downloads, and more modular, re-purposable code that can be much easier to modify than mixtures of technologies cemented together in a single file. js files) The advantages of linking to external JavaScript files become immediately obvious when the same script needs to run on more than one page of a site. If the script were embedded in the HTML markup, each page would be bloated with redundant content, and modifying the script would necessitate repeating the same changes in more than one file.

Word just isn’t the right tool for this job. Nothing’s wrong with using bare-essentials text editors. In Windows, that includes the WordPad program or a more fully featured product such as Visual Studio or the shareware editor called TextPad. For Mac OS X, the bundled TextEdit application is also fine. de/subethaedit). Choosing a browser The other component that is required for learning JavaScript is the browser. You don’t have to be connected to the Internet to test your scripts in the browser.

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