jQuery檢查瀏覽器版本

使用jQuery在幾行代碼中檢查您的瀏覽器版本，您可以為諸如Firefox，IE，Safari，Chrome等不同瀏覽器的代碼優化代碼。 jQuery functions jquery.browser（） and jquery.browser.version（）為我們做所有的辛勤工作！ 這是您的做法。 //示例：輸出有關當前瀏覽器的所有版本信息

jQuery<span>.each(jQuery.browser, function(i<span>, val</span>) {
</span>  <span>$("
</span><span>" + i + " : " + val + "")
</span>			<span>.appendTo( document.body );
</span><span>});
</span>

<span>Example outputs: 
</span>
	 <span>Internet Explorer: 6.0, 7.0, 8.0
</span>	 <span>Mozilla/Firefox/Flock/Camino: 1.7.12, 1.8.1.3, 1.9
</span>	 <span>Opera: 10.06, 11.01
</span>	 <span>Safari/Webkit: 312.8, 418.9
</span>
 

<span>//Example: Alerts “Do stuff for firefox 3” only for firefox 3 browsers.
</span>
<span>var ua = $.browser;
</span><span>if ( ua.mozilla && ua.version.slice(0,3) == "1.9" ) {
</span>	<span>alert( "Do stuff for firefox 3" );
</span><span>}
</span>
<span>//Example: Set a CSS property to specific browser.
</span>
<span>if ( $.browser.msie ) {
</span>	<span>$("#div ul li").css( "display","inline" );
</span><span>} else {
</span>	<span>$("#div ul li").css( "display","inline-table" );
</span><span>}
</span>


<span>Frequently Asked <span>Questions</span> (FAQs) about jQuery and Browser Version Detection
</span>


<span>How can I use jQuery to detect the browser version? jQuery provides a property called $.browser which can be used to detect the browser version. <span>However</span>, it’s important to note that this property was removed in jQuery 1.9 and is available only through the jQuery Migrate plugin. <span>Here’s</span> a simple example of how you can use it:if ($.browser.msie && $.browser.version This code will load jQuery version 3.5.1.  Can I use multiple versions of jQuery on the same page? Yes, you can use multiple versions of jQuery on the same page by using the $.noConflict method. This method releases the control of the `= variable, allowing you to use it with another library or another version of jQuery. Here’s an example:var jq1 = $.noConflict(true);In this code, jq1 is a new alias for the first loaded jQuery, and the `= variable is free to be used with another version.  How can I use jQuery to detect the browser type? You can use the $.browser property to detect the browser type. This property contains flags for the browser, and it is available through the jQuery Migrate plugin. Here’s an example:if ($.browser.chrome) { // actions to take if the browser is Chrome}This code checks if the browser is Chrome.  How can I use jQuery to detect mobile browsers? You can use the navigator.userAgent property in combination with a regular expression to detect mobile browsers. Here’s an example:if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) { // actions to take if the browser is a mobile browser}This code checks if the browser is a mobile browser.  How can I use jQuery to detect if JavaScript is enabled? You can use the <noscript> HTML tag to provide an alternative content for users who have JavaScript disabled. However, if you want to perform a check using jQuery, you can add a class to the  tag using JavaScript, and then check for this class using jQuery. Here’s an example:<script>document.body.className = '';</script>if ($('body').hasClass('no-js')) { // actions to take if JavaScript is disabled}This code checks if JavaScript is enabled. If it is, the no-js class will be removed by the script, and the jQuery check will return false. If JavaScript is disabled, the no-js class will remain, and the jQuery check will return true.  
</noscript></span>

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