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Program code about the three ways of using js (inline js, internal js, external js)
Program code about the three ways of using js (inline js, internal js, external js)
Oct 09, 2018 pm 02:32 PM
This article mainly introduces to you the example code of the three ways of using js (inline js, internal js, external js). The editor thinks it is quite good. Now I will share it with you. Interested friends can refer to it. , the details are as follows:
1. Inline js: js is not written separately
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>js使用方式1：行內(nèi)js</title> </head> <body> <input type="button" value="點(diǎn)擊有驚喜" onclick="javascript:alert('哈哈哈哈')"> <!--onclick:點(diǎn)擊觸發(fā)一個(gè)事件，alert：彈出一個(gè)對(duì)話框--> </body> </html>
2. Internal js: the program in script can be used on the entire page
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>js使用方式2：內(nèi)部js</title>
<script type="text/javascript">
//聲明一個(gè)函數(shù)(整個(gè)文檔都可以使用)
function surprise() {
alert('恭喜你中了一百萬')/*彈出框*/
}
</script>
</head>
<body>
<input type="button" value="點(diǎn)擊有驚喜" onclick="surprise()"><!--調(diào)用函數(shù)-->
<input type="button" value="點(diǎn)擊" onclick="surprise()">
</body>
</html>3. External js: Many html pages can call the set js page
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>js使用方式3：外部js</title> <!--很多html頁面都可以調(diào)用js4.js頁面--> <script src="../../js/js4.js" type="text/javascript" charset="utf-8"> </script> </head> <body> <input type="button" value="點(diǎn)擊" onclick="test()"> </body> </html>
Summary: The above is the js introduced to you. The example code of the three usage methods (inline js, internal js, external js), I hope it will be helpful to everyone's learning.
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