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Method: 1. Use it in the event attribute of the tag, the syntax "8748f9ad597df30f67f230c2f414f1a4"; 2. Write it in the script tag pair, the syntax "9eea5c1f09471d93f466f7b678f314f3"; 3. Use the "8f46e005a9c1806906f3c7d0c67a68462cacc6d41bbb37262a98f745aa00fbf0" statement.
The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, Dell G3 computer.
The usage of js is similar to css:
1. Inline
Use "";
<body onload="alert('hello world3')";> </body>## in the label attribute
#2. Embedded
Use script tag directly<script>
alert("hello world2");
</script>
3. Linked
Use dc6ac8f2315a7115d9939bd34c8b8db6Introducing external .js files<script type="text/javascript" src="js学习.js"></script>js file code
alert("hello world 1");[Recommended learning: javascript advanced tutorial】
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