Javascript文件的动态加载
作者 :towaywu
2016-01-28 17:26:24.0
29 浏览
类别 :HTML/CSS/JAVASCRIPT 编程语言
Javascript文件动态加载一直是比较困扰的一件事情,像网络上传的比较常见的做法:
代码名称
function loadjs(fileurl){ var sct = document.createElement("script"); sct.src = fileurl; document.head.appendChild(sct);} 然后我们来测试一下结果:
代码名称
<html> <head> <link rel="stylesheet" type="text/css" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" media="screen" /> </head> <body> <script>
function loadjs(fileurl){ var sct = document.createElement("script"); sct.src = fileurl; document.head.appendChild(sct); } loadjs("http://code.jquery.com/jquery-1.12.0.js"); loadjs("http://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js") loadjs("http://bootboxjs.com/bootbox.js") </script> </body></html>
代码加载完后,会出现下图的错误.
jquery明明是加载在第一个处理,为什么还是报jQuery不存在的对象呢? 因为这样加载,相当于开启了三个线程,只是jquery这个文件先启动线程,而jquery执行完这个线程的时间,超过了后面两个时间. 因此后面执行完的,可能没能找到jquery这个对象.
然这种方式怎么处理呢? 其实文件的加载是有个状态处理的.文件的加载有个onload事件,就是可以监听文件是否加载完成的事件.
因此我们可以考虑这个方法来处理我们想要的结果.我们用直观的方式来处理.改进后的代码如下:
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌R.E.P.O. Best Graphic Settings4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌Assassin's Creed Shadows: Seashell Riddle Solution2 weeks agoByDDDR.E.P.O. How to Fix Audio if You Can't Hear Anyone4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌WWE 2K25: How To Unlock Everything In MyRise1 months agoBy尊渡假赌尊渡假赌尊渡假赌Hot Tools
Dreamweaver Mac version
Visual web development tools
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
SublimeText3 Linux new version
SublimeText3 Linux latest version
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
