Home > Developer > JavaScript

JavaScript implements iframe automatic height adjustment and cross-origin of different primary domain names, javascriptiframe

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

JavaScript implements iframe automatic height adjustment and cross-origin of different primary domain names, javascriptiframe

As we all know, JavaScript has a same-origin policy, that is, different nested iframe of the primary domain name does not allow Js communication.

For example, if I have a website that is embedded with its webpage. Then I can use iframe to reference the address of a third-party website.

However, the iframe height is fixed and cannot be well integrated with a third-party website. For example, if a third-party website uses the waterfall stream plug-in and needs to scroll to load the automatically calculated height, cross-origin is the first question: the iframe primary domain name has different cross-domain methods. If an iframe reference B .com is put in website A.com B .com A, Js in B .com cannot access A.com. Javascript cross-origin must be the same origin, that is, the same primary domain name. Is that swollen?

We can introduce an iframe in B .com and call it "C". This iframe loads a webpage in A.com. In this way, a webpage in the iframe in B .com can communicate with A.com. Next, as long as B communicates with C, C communicates with A to complete B-> A communication. In this way, C is notified when B's height changes, and C notifies A to adjust the iframe height.
Communication between B and C can be achieved through the url address. B .com iframe is set to hidden. C can receive the communication when the src address is changed.

No need to talk about code.

A.com/index.html


B .com/index.html


<Html> 


C proxy File


<Script> var search = window. location. search, getSearchParam = function (search, key) {var mc = search. match (new RegExp (key + "= ([^ \ &] *)"), ret = ""; mc & mc. length & (ret = mc [0]. replace (key + "=", ""); return ret;}, // parameter h = getSearchParam (search, "h"), ifmID = getSearchParam (search, "ifmID"), cbn = getSearchParam (search, "cbn"), // width and height mh = getSearchParam (search, "mh") | h, isFunction = function (fn ) {Return !! Fn &&! Fn. nodeName & fn. constructor! = String & fn. constructor! = RegExp & fn. constructor! = Array & (/function/I ). test (fn + "") ;}; try {if (parent & parent. parent) {ifm = parent.parent.doc ument. getElementById (ifmID); ifm & mh & (ifm. height = mh); fn = parent. parent [cbn]; isFunction (fn) & fn. call (); ifm = null ;}} catch (ex) {console. log (ex) ;}</script>



Articles you may be interested in:

  
    
 
   
  • Summary of several methods for partial refresh using iframe in JavaScript
    • 
 
   
  • Js Method for checking whether iframe is loaded
    • 
 
   
  • Js implementation to prevent iframe
    • 
 
   
  • How to use JavaScript to control homepage redirection in iframe
    • 
 
   
  • How to obtain the longdesc attribute in iframe using JS
    • 
 
   
  • Perfect Method for judging whether iframe is loaded in js
    • 
 
   
  • Real iframe highly adaptive implemented by js (compatible with IE, FF, and Opera)
    • 
 
   
  • How to obtain and operate elements in iframe in JS
    • 
 
   
  • Example of calling js functions on the iframe parent page
    • 
 
   
  • In-depth introduction to js iframe cross-origin access (same main domain/non-main domain)
    •

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:
different types of fonts and names roomba height adjustment different types of domains names names of different email accounts names of different database software image height and width validation in javascript domain names and registration
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