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>
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<span class="Articlelist_txts_time">Feb 27, 2024 pm 06:45 PM</span>
<p class="Articlelist_txts_p">Detailed explanation of jQuery reference method: Quick start guide jQuery is a popular JavaScript library that is widely used in website development. It simplifies JavaScript programming and provides developers with rich functions and features. This article will introduce jQuery's reference method in detail and provide specific code examples to help readers get started quickly. Introducing jQuery First, we need to introduce the jQuery library into the HTML file. It can be introduced through a CDN link or downloaded</p>
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<a href="https://www.php.cn/faq/692694.html" title="How to use PUT request method in jQuery?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/164/170910433346845.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to use PUT request method in jQuery?" />
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<a href="https://www.php.cn/faq/692694.html" title="How to use PUT request method in jQuery?" class="phphistorical_Version2_mids_title">How to use PUT request method in jQuery?</a>
<span class="Articlelist_txts_time">Feb 28, 2024 pm 03:12 PM</span>
<p class="Articlelist_txts_p">How to use PUT request method in jQuery? In jQuery, the method of sending a PUT request is similar to sending other types of requests, but you need to pay attention to some details and parameter settings. PUT requests are typically used to update resources, such as updating data in a database or updating files on the server. The following is a specific code example using the PUT request method in jQuery. First, make sure you include the jQuery library file, then you can send a PUT request via: $.ajax({u</p>
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<a href="https://www.php.cn/faq/691569.html" title="In-depth analysis: jQuery's advantages and disadvantages" class="phphistorical_Version2_mids_img">
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src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/170902549498790.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="In-depth analysis: jQuery's advantages and disadvantages" />
</a>
<a href="https://www.php.cn/faq/691569.html" title="In-depth analysis: jQuery's advantages and disadvantages" class="phphistorical_Version2_mids_title">In-depth analysis: jQuery's advantages and disadvantages</a>
<span class="Articlelist_txts_time">Feb 27, 2024 pm 05:18 PM</span>
<p class="Articlelist_txts_p">jQuery is a fast, small, feature-rich JavaScript library widely used in front-end development. Since its release in 2006, jQuery has become one of the tools of choice for many developers, but in practical applications, it also has some advantages and disadvantages. This article will deeply analyze the advantages and disadvantages of jQuery and illustrate it with specific code examples. Advantages: 1. Concise syntax jQuery's syntax design is concise and clear, which can greatly improve the readability and writing efficiency of the code. for example,</p>
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<a href="https://www.php.cn/faq/692099.html" title="How to remove the height attribute of an element with jQuery?" class="phphistorical_Version2_mids_img">
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</a>
<a href="https://www.php.cn/faq/692099.html" title="How to remove the height attribute of an element with jQuery?" class="phphistorical_Version2_mids_title">How to remove the height attribute of an element with jQuery?</a>
<span class="Articlelist_txts_time">Feb 28, 2024 am 08:39 AM</span>
<p class="Articlelist_txts_p">How to remove the height attribute of an element with jQuery? In front-end development, we often encounter the need to manipulate the height attributes of elements. Sometimes, we may need to dynamically change the height of an element, and sometimes we need to remove the height attribute of an element. This article will introduce how to use jQuery to remove the height attribute of an element and provide specific code examples. Before using jQuery to operate the height attribute, we first need to understand the height attribute in CSS. The height attribute is used to set the height of an element</p>
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<a href="https://www.php.cn/faq/693182.html" title="jQuery Tips: Quickly modify the text of all a tags on the page" class="phphistorical_Version2_mids_img">
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</a>
<a href="https://www.php.cn/faq/693182.html" title="jQuery Tips: Quickly modify the text of all a tags on the page" class="phphistorical_Version2_mids_title">jQuery Tips: Quickly modify the text of all a tags on the page</a>
<span class="Articlelist_txts_time">Feb 28, 2024 pm 09:06 PM</span>
<p class="Articlelist_txts_p">Title: jQuery Tips: Quickly modify the text of all a tags on the page In web development, we often need to modify and operate elements on the page. When using jQuery, sometimes you need to modify the text content of all a tags in the page at once, which can save time and energy. The following will introduce how to use jQuery to quickly modify the text of all a tags on the page, and give specific code examples. First, we need to introduce the jQuery library file and ensure that the following code is introduced into the page: <</p>
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<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/692928.html" title="Use jQuery to modify the text content of all a tags" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/465/014/170911333171493.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Use jQuery to modify the text content of all a tags" />
</a>
<a href="https://www.php.cn/faq/692928.html" title="Use jQuery to modify the text content of all a tags" class="phphistorical_Version2_mids_title">Use jQuery to modify the text content of all a tags</a>
<span class="Articlelist_txts_time">Feb 28, 2024 pm 05:42 PM</span>
<p class="Articlelist_txts_p">Title: Use jQuery to modify the text content of all a tags. jQuery is a popular JavaScript library that is widely used to handle DOM operations. In web development, we often encounter the need to modify the text content of the link tag (a tag) on the page. This article will explain how to use jQuery to achieve this goal, and provide specific code examples. First, we need to introduce the jQuery library into the page. Add the following code in the HTML file:</p>
</div>
<div class="phphistorical_Version2_mids">
<a href="https://www.php.cn/faq/692515.html" title="Understand the role and application scenarios of eq in jQuery" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/170909731284988.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="Understand the role and application scenarios of eq in jQuery" />
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<a href="https://www.php.cn/faq/692515.html" title="Understand the role and application scenarios of eq in jQuery" class="phphistorical_Version2_mids_title">Understand the role and application scenarios of eq in jQuery</a>
<span class="Articlelist_txts_time">Feb 28, 2024 pm 01:15 PM</span>
<p class="Articlelist_txts_p">jQuery is a popular JavaScript library that is widely used to handle DOM manipulation and event handling in web pages. In jQuery, the eq() method is used to select elements at a specified index position. The specific usage and application scenarios are as follows. In jQuery, the eq() method selects the element at a specified index position. Index positions start counting from 0, i.e. the index of the first element is 0, the index of the second element is 1, and so on. The syntax of the eq() method is as follows: $("s</p>
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<a href="https://www.php.cn/faq/693462.html" title="How to tell if a jQuery element has a specific attribute?" class="phphistorical_Version2_mids_img">
<img onerror="this.onerror=''; this.src='/static/imghw/default1.png'"
src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/164/170916859138598.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="How to tell if a jQuery element has a specific attribute?" />
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<a href="https://www.php.cn/faq/693462.html" title="How to tell if a jQuery element has a specific attribute?" class="phphistorical_Version2_mids_title">How to tell if a jQuery element has a specific attribute?</a>
<span class="Articlelist_txts_time">Feb 29, 2024 am 09:03 AM</span>
<p class="Articlelist_txts_p">How to tell if a jQuery element has a specific attribute? When using jQuery to operate DOM elements, you often encounter situations where you need to determine whether an element has a specific attribute. In this case, we can easily implement this function with the help of the methods provided by jQuery. The following will introduce two commonly used methods to determine whether a jQuery element has specific attributes, and attach specific code examples. Method 1: Use the attr() method and typeof operator // to determine whether the element has a specific attribute</p>
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