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HTML5 Realization of page screenshot page generated pictures (graphic)

Source: Internet
Author: User
Tags domain server
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Html2canvas the functionality of the page by getting style information for the DOM and elements of the page and rendering it into a canvas picture.

Because each browser renders the page differently, the resulting picture is not the same.

Environmental Requirements : JQuery
compatibility : Firefox 3.5+, Chrome, Opera, IE9

Official homepage : http://html2canvas.hertzen.com/

Test the resulting picture effect some elements of the style are not fully displayed

1 <HTML>2     <Head>3         <Metaname= "Layout"content= "Main">4         <Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" />  5         <Scripttype= "Text/javascript"src= "Http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></Script>6         <Scripttype= "Text/javascript"src= "Http://html2canvas.hertzen.com/build/html2canvas.js"></Script>7          8         <Scripttype= "Text/javascript" >9 $ (document). Ready (function(){Ten                 $(". example1"). On ("Click", function(event) { One Event.preventdefault (); A Html2canvas (document.body, { - Allowtaint:true, - tainttest:false, the onrendered:function(canvas) { - canvas.id= "MyCanvas"; -                             //document.body.appendChild (canvas); -                             //generate base64 picture data +                             varDataurl=Canvas.todataurl (); -                             varnewimg=Document.createelement ("img"); + newimg.src=Dataurl; A Document.body.appendChild (newimg); at                         } -                     }); -                 });  -               -         }); -           in         </Script> -     </Head> to     <Body> +           - hello! the         <Divclass=""style= "Background-color: #abc;"> * Computer Heaven Test HTML5 page $             <BR>jsjtt.comPanax Notoginseng         </Div> -           the         <TextAreaID= "TextArea"Col= " the"rows= "Ten" ></TextArea> +         <inputclass= "Example1"type= "button"value= "button"> A The build interface is as follows: the     </Body> + </HTML>

Describes a problem that occurs during the test if you call Todataurl on a page that references a cross-domain picture file

Securityerror:the operation is insecure.

Workaround: Set the header on a cross-domain server to allow cross-domain requests

Access-control-allow-origin: *  access-control-allow-credentials:true

Original address: Computer Paradise---HTML5 implementation page screenshot page generated image http://www.jsjtt.com/webkaifa/html5/2013-10-29/42.html

HTML5 Realization of page screenshot page generated pictures (graphic)

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:
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