jquery-selectors

问题 $(this).find("input[name=amount]").val($(this).find("input[name=amount]").val().replace('$', '')); Keep getting this error on my developer tools. I just want to replace the character $ with nothing which is '' Thoughts? 回答1: Your error just says that there is no element that matches your selector, so element.val() is returning undefined , which has no replace method. Try debugging it and console.log() at each step. Also, you don't need to search for the element twice. Just store it in a

问题 I want to select an element which was created by the CSS selector :before . I tried it by using $('#element:before') , but that did not work, because it selected the whole element and not only the :before element. Here is the sample code: DEMO In that example, only the string "1. " should be red, not the whole string. Any idea how to do this? 回答1: JQuery cannot set css properties on :before content, since it is not contained in an element. If you want to be able to manipulate the color of the

问题 I need to select the previous element using only a jQuery selector. <li class="collapsable"> <div class="hitarea collapsable-hitarea"></div> <span id="devicelist" class="ankr">Device List</span> <ul id="ultree"> <li type="dev" device="/dev/sdh1" id="dev0" class="litab"> <img height="20px" width="20px" src="../Images/drive.png" class="dicon"> <a class="ankr dn" href="#">'/dev/sdh1'</a> </li> </ul> </li> $(document).on("click","#devicelist,**Here Selector will be used**",this,function(event){

问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: What is the new proper way to use a child selector with a context node in jQuery? From the jQuery docs: Note: The $("> elem", context) selector will be deprecated in a future release. Its usage is thus discouraged in lieu of using alternative selectors. http://api.jquery.com/child-selector/ What would be an alternative selector for this? 回答1: $(context).children('elem') also $("> elem", context) is deprecated,

问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: What is the new proper way to use a child selector with a context node in jQuery? From the jQuery docs: Note: The $("> elem", context) selector will be deprecated in a future release. Its usage is thus discouraged in lieu of using alternative selectors. http://api.jquery.com/child-selector/ What would be an alternative selector for this? 回答1: $(context).children('elem') also $("> elem", context) is deprecated,

问题 I have a form where you can dynamically add new rows via jQuery. It creates the elements fine. However, I have a select box on the new row. When it is created, it is empty. I need to populate it from the first select box of that type (class). Here is the HTML... <select class="cyclePoSelect" name="poNumber[]" style="WIDTH: 100px"> <option value="0" selected="">Select One</option> <option value="VE-13475">VE-13475</option> <option value="VZ-61300">VZ-61300</option> </select> <select class=

问题 I would like to remove all the attributes that attribute name starts with 'data-val' in the fields that has a class 'read-only-state' jQuery("[data-val^='tr']" ) This will give attribute 'data-val' value that starts with 'tr' But i need to remove all the attributes that starts with 'data-val' in the matched elements. How can i do it? 回答1: You can use vanilla javascript's attributes for this: $('.read-only-state').each(function() { // get the native attributes object var attrs = this

问题 How to access the div with specific class that is on the same level of DOM using jQuery? I've tried .closest() but it doesn't find the element. For example: <!-- foreach loop starts { --> <fieldset> <legend>Values</legend> <div class="characteristic-values"> <!-- many divs inside --> </div> <input type="button" class="add-charactersitic-value" value="Add Value" /> </fieldset> <!-- } foreach loop ends --> And JavaScript that tries to access the "charactersitic-values" but without success:

问题 I know there's the possibility, using jQuery, to mix Multiple Selector with Multiple Attribute Selector and, indeed, I used it. For example, this works fine: $('input[type="checkbox"][name^="selected"]:checked', theForm).length In my example, "theForm" is a string containing "#form1" which I use to refer to my form that has the attribute id="form1". Well, that said, the question is: is it possible mixing the above with jQuery filter? Here is a code example: var myVar = $('input[name^="modcc_"

问题 Is there an opposite of .find()? Where $('.myclass').except('#myid'); Would grab all elements with .myclass except the element with #myid. I know I could do $('.myclass[id=myid]') in this example, but seems like it would be helpful in other cases. Thanks EDIT: Thanks for the responses! Looks like I just missed seeing .not() and :not() in the documentation. 回答1: $('.myclass').not('#myid'); http://api.jquery.com/not/ 回答2: Try .not() – it removes any element matching the selector. 回答3: $('