H5 知识点

来源：互联网发布：可以打鼓的软件编辑：程序博客网时间：2024/05/21 18:42

H5新特性video和audio标签

<!DOCTYPE html> <html> <body> <div style="text-align:center;">  <button onclick="playPause()">播放/暂停</button>   <button onclick="makeBig()">大</button>  <button onclick="makeNormal()">中</button>  <button onclick="makeSmall()">小</button>  <br />   <video id="video1" width="420" style="margin-top:15px;">    <source src="/example/html5/mov_bbb.mp4" type="video/mp4" />    <source src="/example/html5/mov_bbb.ogg" type="video/ogg" />    Your browser does not support HTML5 video.  </video></div> <script type="text/javascript">var myVideo=document.getElementById("video1");function playPause(){ if (myVideo.paused)   myVideo.play(); else   myVideo.pause(); } function makeBig(){ myVideo.width=560; } function makeSmall(){ myVideo.width=320; } function makeNormal(){ myVideo.width=420; } </script> </body> </html>

在head中调用script

<html><head><script type="text/javascript">function message(){  alert("该提示框是通过 onload 事件调用的。")}</script></head><body onload="message()"></body></html>

在body中调用script

<html><head></head><body><script type="text/javascript">document.write("该消息在页面加载时输出。")</script></body></html>

调用外部脚本

<html><head></head><body><script src="/js/example_externaljs.js"></script><p>实际的脚本位于名为 "xxx.js" 的外部脚本中。</p></body>

自定义事件

<!DOCTYPE html><html><head><script>function myFunction(){document.getElementById("demo").innerHTML="My First JavaScript Function";}function myFunction2(){  document.getElementById("head1").innerHTML="自定义函数";}</script></head><body><h1 id="head1">My Web Page</h1><p id="demo">A Paragraph.</p><button type="button" onclick="myFunction()">点击这里</button><button type="button" onclick="myFunction2()">点我</button></body></html>

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