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Common skills for javascript beginners_javascript skills

WBOYOriginal: 2016-05-16 16:38:011405browse

The examples in this article explain some common techniques used by JavaScript beginners. Share it with everyone for your reference. The details are as follows:

1. Javascript program storage location

In HTML6c04bd5ca3fcae76e30b72ad730ca86d36cc49f0c466276486e50c850b7e4956
HTML93f0f5c25f18dab9d176bd4f6de5d30e9c3bca370b5104690d9ef395f2c5f8d1
*.js file inside

2. Standard format

Put it inside the 6c04bd5ca3fcae76e30b72ad730ca86d36cc49f0c466276486e50c850b7e4956 of HTML. When the browser loads the Body part, it will start executing Javascript

<html>
<head></head>
<body>
<script type="text/javascript">
。。。。。。
</script>
</body>
</html>

is placed between 93f0f5c25f18dab9d176bd4f6de5d30e9c3bca370b5104690d9ef395f2c5f8d1 in HTML, generally used to trigger user events

<html>
<head>
<script type="text/javascript">
。。。。。。
</script>
</head>
<body></body>
</html>

For some shared js methods or other ways to avoid code duplication, you can put the js into the *.js file and introduce it into the html

<html>
<head>
<script src="filepath/*.js"/></script>
</head>
<body>
</body>
</html>

3. Common Events Text Box Focus Events

onblur: lost focus event

onfocus: Get focus event

onchange: Text box text change event

onselect: select text box text event

<input type="text" value="test text!" onfocus="if(value=='test text!') {value=''}" onblur="if(value=='') {value='test text!'}" />
<!-- 初始值为test text! 获得焦点后判断用户无输入将文本框设空 失去焦点时判断为空时设置默认值 -->

I hope this article will be helpful to everyone’s learning of javascript programming.

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