textarea

问题 That's it. How can I get the old value of a textarea in order to compare it with a new value?. The current value becomes the old value after triggering an event (say, a keyup event). I have seen some solutions, for example, using cookies to record the old value and the new value, however, such solution doesn't work in my case because of the type of manipulation I want to perform later. Hopefully, there is a suggestion which works better than that. Thanks in advance. UPDATE : After following

问题 I have several textareas and radio buttons that are dynamically generated inside a ko: foreach binding. When a user decides they are done typing their input, they will click a button 'OK' which takes all of the input of the textareas and values of the radio buttons they have chosen and it should trigger an ajax call to the server because the input needs to be stored in a database. Each textarea and radiobutton value is stored separately, so they need to be sent to the server as distinguished

问题 The following code works only if I don't first type in the textarea box. If i type in it, clicking on the div does nothing. Is there any way to fix this in javascript or whatever? Any help is appreciated. <textarea id = "textarea">change this</textarea> <div onclick = "change()">click here<div> <script> function change() { document.getElementById( 'textarea' ).innerHTML = 'new text'; } </script> here is the jsfiddle http://jsfiddle.net/69n24agz/ 回答1: Change innerHTML to value, <textarea id =

问题 any ideas on how to scroll to bottom of a ckeditor editor using javascript / jQuery? I cant find anything. All my search shows is: document.getElementById("ID").contentWindow.scrollTo(0,3); Which gives me an error of contentWindow is undefined. The class of the ckeditor text part appears to be "cke_editable". Any help on scrolling to the bottom of the editor? 回答1: Access the editor and get the editable area via that instead of getting the DOM element directly. Like so: var editor = CKEDITOR

问题 I always use this snippet in my work: <input type="text" onblur="if (this.value=='') { this.value='your email'; }" onfocus="if (this.value == 'your email') { this.value=''; }" value="your email" /> Basically it will show a text box with "your email" as the value, when the clicks the text input box - the value becomes blank.. thus they type their email.. if they don't type an email it will reset back to the "your email". I want to do this or similar with textarea and convert it to jQuery (also

问题 I have a problem: I have a textarea on my page that looks like this: <textarea id='redactor_content' name='redactor_content' style='width: 720px; height: 320px;'>$news[3]</textarea> Where $news[3] is a php variable that I get from MySQL. redactor_content is a WYSIWYG editor where I edit the content of $news[3] . After the content is edited, I want to pass it to mysql to update the table with the following JavaScript: function update_news(n_id) { var title = $('#title').val(); var news_body =

问题 I know how to do this in basic JS: document.getElementById("someTextarea").value += "stuff"; Note the + - I'm adding to the value, not completely changing it. How would I do that using jQuery's val()? 回答1: $('#foo').val($('#foo').val() + 'something'); (Of course you can and should cache the element). Another way (very jQuery style): $('#foo').val(function(){ return this.value + "something"; }); 回答2: $('#someTextarea').val(function(i, v){ return v + 'stuff'; }); 回答3: Since an ID selector will

问题 I know how to do this in basic JS: document.getElementById("someTextarea").value += "stuff"; Note the + - I'm adding to the value, not completely changing it. How would I do that using jQuery's val()? 回答1: $('#foo').val($('#foo').val() + 'something'); (Of course you can and should cache the element). Another way (very jQuery style): $('#foo').val(function(){ return this.value + "something"; }); 回答2: $('#someTextarea').val(function(i, v){ return v + 'stuff'; }); 回答3: Since an ID selector will

问题 This question probably is asked in other framework, not sure if there is one on ExtJs, which I am new to. I wonder whether there is a simple example with a TextArea and a button. When the button is pressed, a fixed string "???" is inserted at the cursor in the TextArea. Thanks in advance. 回答1: You can actually do this straight from the DOM, using textareas selectionStart attribute to find the caret position. So you could do something along the lines of textArea.value = textArea.value