What is JavaScript?
- JavaScript is designed to add interactive behavior to HTML pages.
- JavaScript is a scripting language (the scripting language is a lightweight programming language).
- JavaScript consists of several lines of executable computer code.
- JavaScript is usually embedded directly into an HTML page.
- JavaScript is an explanatory language (that is, code execution is not precompiled).
- All people can use JavaScript without having to purchase a license.
are Ava and JavaScript the same?
Different!
In terms of concept and design, Java and JavaScript are two completely different languages.
Java (developed by Solar Micro systems) is a powerful and more complex programming language, like the same level of C and C + +.
What can JavaScript do?
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JavaScript provides a programming tool for HTML designers
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HTML creators are often not programmers, but JavaScript is a scripting language with a very simple syntax! Almost everyone has the ability to put short snippets of code into their HTML pages.
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JavaScript can put dynamic text in an HTML page
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A piece of JavaScript that resembles this can put a variable piece of text in an HTML page: document.write ("
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JavaScript can respond to events
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JavaScript can be set to be executed when an event occurs, such as when a page is loaded or when a user taps an HTML element.
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JavaScript can read and write HTML elements
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JavaScript can read and change the contents of HTML elements.
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JavaScript can be used to validate data
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JavaScript can be used to validate data before it is committed to the server.
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JavaScript can be used to detect visitors ' browsers
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JavaScript can be used to detect the visitor's browser and load the corresponding page for the browser based on the detected browser.
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JavaScript can be used to create cookies
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JavaScript can be used to store and retrieve information that resides on a visitor's computer.
JavaScript Basic Understanding
