Browser Sniffing¶
| Status: | Draft |
|---|---|
| Version: | 1.0 |
| Authors: | Peter Higgins, Ben Lowery |
Contents
You should try to use capability detection (http://dev.opera.com/articles/view/using-capability-detection/) when possible. When that is not an option, Dojo provides a number of is variables for browser detection, defined at runtime based on the users current browser.
- dojo.isIE
- dojo.isMozilla
- dojo.isFF
- dojo.isOpera
- dojo.isSafari
- dojo.isKhtml
- dojo.isAIR - true if running within the Adobe AIR enviroment
- dojo.isQuirks - is the browser in Quirks-Mode
- dojo.isBrowser (not typically needed when only targeting browsers)
For Dojo 1.3, the following were added:
- dojo.isWebKit
- dojo.isChrome
Each variable is only defined if the specified browser is being used. For example, if you’re using Internet Explorer, only dojo.isIE is defined; all the other variables are undefined. The variable holds the browser version number as a Number, so you can easily perform version checks. Additionally, since undefined always evaluates as false in if statements, you can use code like this to check for a certain browser version:
1 2 3 4 5 6 7 8 9 10 11 | if(dojo.isIE <= 6){ // only IE6 and below
...
}
if(dojo.isFF < 3){ // only Firefox 2.x and lower
...
}
if(dojo.isIE == 7){ // only IE7
...
}
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