There is a focus() method in jQuery that can set the focus of an object. In versions below 1.7, this method will not report an error regardless of whether the object is disabled (but when it is disabled, the code for setting the focus is invalid). But in version 1.7, if the object is in the disabled state, when the focus() method is called, an exception will be reported directly:
Error: Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus.
means: Invisible or unavailable elements cannot gain focus. (Special mention: IE9 is very cool and can automatically recognize this situation. It will not report an error under IE9, but versions below IE9 will all hang.)
Test< /title><br> <script src="jquery-1.7.min.js" type="text/javascript"></script><br> <!--<script src="jquery- 1.4.4.min.js" type="text/javascript"></script>--><br> <script type="text/javascript"><br> function fnTest(){<br> //try{<br> $("#txt").focus();<br> //}catch(e){}<br> } <br> </script><br> < /head><br> <body><br> <div><br> <input type="text" disabled="disabled" id="txt"/><br> <input type=" text" id="txt2"/><br> <input type="button" value="Test" onclick="fnTest()"/><br> </div><br> </ body><br></html><br>
</div>
<br>Although it is only a small change, it can easily cause big problems, especially your js code. After focus(), there are other When you have a lot to do :)
<p><strong><font style="COLOR: #ff0000">Suggestion: <br></font></strong>If you must use the highest version of jQuery, the easiest way is to add a try/catch when writing xxx.focus(). Become try{xxx.focus();}catch(e){}</p></div><div class="nphpQianMsg"><div class="clear"></div></div><div class="nphpQianSheng"><span>Statement：</span><div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn</div></div></div><div class="nphpSytBox"><span>Previous article：<a class="dBlack" title="How to batch set attributes readonly and disabled in jquery_jquery" href="https://m.php.cn/faq/14281.html">How to batch set attributes readonly and disabled in jquery_jquery</a></span><span>Next article：<a class="dBlack" title="How to batch set attributes readonly and disabled in jquery_jquery" href="https://m.php.cn/faq/14283.html">How to batch set attributes readonly and disabled in jquery_jquery</a></span></div><div class="nphpSytBox2"><div class="nphpZbktTitle"><h2>Related articles</h2><em><a href="https://m.php.cn/article.html" class="bBlack"><i>See more</i><b></b></a></em><div class="clear"></div></div><ins class="adsbygoogle"
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