How do I check if there isn’t a class. For example, I know how to check to see if it has the class “test”, but how do I check to see if it doesn’t have the class “test”? if($(this).hasClass(“test”)){ } 9 Answers 9
I have an select box: <select id=”selectBox”> <option value=”0″>Number 0</option> <option value=”1″>Number 1</option> <option value=”2″>Number 2</option> <option value=”3″>Number 3</option> <option value=”4″>Number 4</option> <option value=”5″>Number 5</option> <option value=”6″>Number 6</option> <option value=”7″>Number 7</option> </select> I’d like to set one of the options as “selected” based on it’s selected index. For example, if I am trying to set … Read more
Using jQuery I’m programmatically generating a bunch of div‘s like this: <div class=”mydivclass” id=”myid1″>Some Text1</div> <div class=”mydivclass” id=”myid2″>Some Text2</div> Somewhere else in my code I need to detect if these DIVs exist. The class name for the divs is the same but the ID changes for each div. Any idea how to detect them using … Read more
I want to get a list of names of checkboxes that are selected in a div with certain id. How would I do that using jQuery? E.g., for this div I want to get array [“c_n_0”; “c_n_3”] or a string “c_n_0;c_n_3” <div id=”checkboxes”> <input id=”chkbx_0″ type=”checkbox” name=”c_n_0″ checked=”checked” />Option 1 <input id=”chkbx_1″ type=”checkbox” name=”c_n_1″ />Option … Read more
What is the best way to detect if a jQuery-selector returns an empty object. If you do: alert($(‘#notAnElement’)); you get [object Object], so the way I do it now is: alert($(‘#notAnElement’).get(0)); which will write “undefined”, and so you can do a check for that. But it seems very bad. What other way is there? 8 … Read more
Using jQuery, how do I delete all rows in a table except the first? This is my first attempt at using index selectors. If I understand the examples correctly, the following should work: $(some table selector).remove(“tr:gt(0)”); which I would read as “Wrap some table in a jQuery object, then remove all ‘tr’ elements (rows) where … Read more
In jQuery how do I use a selector to access all but the first of an element? So in the following code only the second and third element would be accessed. I know I can access them manually but there could be any number of elements so thats not possible. Thanks. <div class=”test”></div> <div class=”test”></div> … Read more
Is there a simple selector expression to not select elements with a specific class? <div class=”first-foo” /> <div class=”first-moo” /> <div class=”first-koo” /> <div class=”first-bar second-foo” /> I just want to get the first three divs and tried $(div[class^=”first-“][class!=”first-bar”]) But this receives all as the last div contains more than first-bar. Is there a way … Read more
To select a child node in jQuery one can use children() but also find(). For example: $(this).children(‘.foo’); gives the same result as: $(this).find(‘.foo’); Now, which option is fastest or preferred and why? 7 Answers 7
I’m trying to pass “this” from a clicked span to a jQuery function that can then execute jQuery on that clicked element’s first child. Can’t seem to get it right… <p onclick=”toggleSection($(this));”><span class=”redClass”></span></p> Javascript: function toggleSection(element) { element.toggleClass(“redClass”); } How do I reference the :first-child of element? 11 Answers 11
