Home > Developer > JavaScript

Several methods of html-html link JavaScript

Source: Internet
Author: User
Tags cdata script tag
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Put the JavaScript file in the head

The standard approach is to put JavaScript files inside the head tag.

<head>    <scripttype="text/javascript"src="dreamdu.js"></script></head>
    • If the browser does not support JavaScript, the contents of the script tag are ignored and can be avoided <!-- ... //--> (internal references).
    • When JavaScript has any HTML entities, there is no need to use CDATA tags (because the JavaScript code is not directly in the HTML file).
    • JavaScript files must be used js as file suffixes.
Put the JavaScript file in front of the body

To prevent web pages from loading slowly, you can also put non-critical javascript at the bottom of the page, such as the following code.

        <scripttype="text/javascript"src="dreamdu.js"></script>    </body></html>

Usually JavaScript files can be loaded into any part of the Web page using the script tag, but the standard way is to load it inside the head tag.

The contents of a JavaScript file

JavaScript files can contain any JavaScript code, such as in a dreamdu.js file

document.write("www.dreamdu.com");document.write("梦之都");
Benefits of external loading of JavaScript files
    • Avoid <!-- ... //--> the use of hacker technology.
    • Avoid using CDATA.
    • Unified definition of JavaScript code, easy to view, easy to maintain.
    • Make your code more secure, and you can compress and encrypt a single JavaScript file.
    • Browsers can cache JavaScript files and reduce broadband usage (usually only one download at a time when multiple pages are using a single JavaScript file).
Considerations for external loading of JavaScript files
    • Instead of dividing JavaScript into multiple files, multiple files increase the burden on the server and increase the server's HTTP requests.
    • A JavaScript file also increases the HTTP request.
    • Why do some Web sites have a string of numbers behind their JavaScript files? Like what:
<scripttype="text/javascript"src="dreamdu.js?1217128319"></script>

Several methods of html-html link JavaScript

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
javascript array of html elements fleming functions of several variables display value of javascript variable in html date javascript methods ampersand in html link html link force download html link submit form
Related Article
JavaScript solution to the eight Queens Problem method summar...
The difference between single and double quotes in JavaScript...
Http status code: 301, 302 redirection, 302 redirection
The html space symbol nbsp; ensp; emsp; introduces and implem...
Ajax and 302 response code Testing
Ajax and 302 response code test_javascript-js tutorial

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More