HTML5 defines a new attribute for iFrames named
srcdoc. This attribute allows
developers to specify an iFrame's content in-line with the iFrame itself. For
<iframe srcdoc="<html><body>Hello, <b>world</b>.</body></html>"></iframe>
This feature only began to see adoption in major browsers in early 2013. Fortunately, most older browsers support similar functionality through script-targeted URLs, i.e.
(Because of limitations on URL length, the actual mechanism that the polyfill implements not quite this direct.)
By including the script at the bottom of the document
<body>, any available
iFrames which declare a
srcdoc attribute attribute) will receive this
"shimmed" behavior. (In browsers that already implement this functionality, no
change will take place.)
The shim also defines a
srcDoc variable in the global scope:
srcDoc.set( iframe [, content] )- sets the content of the provided iFrame element using the
srcdocattribute where available (falling back on a script-targeted URL in non-supporting browsers). The desired content of the iFrame may optionally be specified. If blank, the current value of the element's
srcdocattribute will be referenced for content.
srcDoc.noConflict()- Sets the value of the global
srcDocvariable to its original value. Returns the
srcDocobject defined by this project for re-aliasing.
Tested in the following browsers:
- Microsoft Internet Explorer
- 6, 7, 8, 9, 10
- 4, 5.0, 5.1
- Google Chrome
- 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.0.1312.5 (beta), 25.0.1364.5 (dev)
- 11.1, 11.5, 11.6, 12.10, 12.11 (beta)
- Mozilla FireFox
- 3.0, 3.6, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 (beta)
The following browsers are not supported:
- Opera 10.0
The build process for this project is written with Grunt.js. Please refer to the grunt documentation for details on installing grunt.
The shim's tests are written in QUnit, and can be run by visiting the
test/index.html file in the browser, or by running
grunt test from the
- Allow content length to exceed the limit browsers impose on URLs
- Initial release
Copyright (c) 2012 Mike Pennisi
Licensed under the MIT license.