onkeyup

How do I prevent a leading space from being entered in a textbox?

由 徘徊边缘 提交于 2021-02-07 10:48:13
问题 I'm using jQuery 2. How do I prevent a space being entered in a textbox if it is a leading space (e.g. at the beginning of the string)? I thought this would do it $(document).on("keyup","#s" ,function(evt){ var firstChar = $("#s").val() if(evt.keyCode == 32 && firstChar){ $("#s").val( $("#s").val().trim() ) console.log(" called ") return false; } }) And basically it does but it is a little sloppy. You can see the space being entered and then removed and I was looking for something slightly

Upgraded to AppCompat v22.1.0 and now onKeyDown and onKeyUp are not triggered when menu key is pressed

由 南楼画角 提交于 2020-01-19 05:19:01
问题 I've just upgraded my app to use the newly released v22.1.0 AppCompat and now onKeyDown and onKeyUp are not triggered when menu key is pressed. The other keys correctly trigger onKeyDown and onKeyUp , but when i press the menu key nothing happens. If I downgrade to v22.0.0 everything returns to work properly. How do I fix it? 回答1: Update 23 August This has been fixed again in the v23.0.0 of appcompat-v7 support library. Update to the last version to see this fixed. Update 19 July

Upgraded to AppCompat v22.1.0 and now onKeyDown and onKeyUp are not triggered when menu key is pressed

由 柔情痞子 提交于 2020-01-19 05:17:12
问题 I've just upgraded my app to use the newly released v22.1.0 AppCompat and now onKeyDown and onKeyUp are not triggered when menu key is pressed. The other keys correctly trigger onKeyDown and onKeyUp , but when i press the menu key nothing happens. If I downgrade to v22.0.0 everything returns to work properly. How do I fix it? 回答1: Update 23 August This has been fixed again in the v23.0.0 of appcompat-v7 support library. Update to the last version to see this fixed. Update 19 July

Javascript : onchange event does not fire when value is changed in onkeyup event [duplicate]

由 孤街浪徒 提交于 2020-01-03 08:38:36
问题 This question already has an answer here : Javascript: “onchange” event does not work with “value” change in “text input” object (1 answer) Closed 6 years ago . I have this simply code : <body> <input type="text" onkeyup="this.value = (new Date()).getSeconds()" onchange="alert(1)" /> </body> I dont't know why the textbox value has changed when i press the key but the onchange event does not fire. How can i fire onchange event ? 回答1: The onchange will fire when you leave the focus from it (if

Javascript : onchange event does not fire when value is changed in onkeyup event [duplicate]

由 空扰寡人 提交于 2020-01-03 08:38:27
问题 This question already has an answer here : Javascript: “onchange” event does not work with “value” change in “text input” object (1 answer) Closed 6 years ago . I have this simply code : <body> <input type="text" onkeyup="this.value = (new Date()).getSeconds()" onchange="alert(1)" /> </body> I dont't know why the textbox value has changed when i press the key but the onchange event does not fire. How can i fire onchange event ? 回答1: The onchange will fire when you leave the focus from it (if

javascript - capture input and convert characters

由 此生再无相见时 提交于 2019-12-30 07:16:46
问题 I want to capture input charcters in text box, convert then according to a table and put them back in text box as user types. <form id='myForm'> Enter phone number:<input type="text" id='idMyText' name="myText" onKeyUp="alphaToNum(this.value)"> </form> <script> // on each keypress in input box, I want to capture key pressed, // determine if key pressed belong to group of identified characters // if, so then convert to specified numeric equivalent and return character // to text box. // This

JavaScript/jQuery: Keypress for keyboard navigation (event.which doesn't work)

由 ≯℡__Kan透↙ 提交于 2019-12-24 23:46:48
问题 When handling key[Up|Down|Press] events, should I use .which or .keyCode? Can I have some example code for handling the three keyboard events in jQuery? Can you do it without jQuery? I want it to work reliably in every browser. Update Strangely, jQuery's event.which normalization wasn't working for my handleKey Press (event) handler: // Add which for key events if ( !event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode) ) { event.which = event.charCode ||

Image change on pressing keyup and keydown

由 只愿长相守 提交于 2019-12-24 06:21:02
问题 I am new to JavaScript and this community. I apologize if this has been asked before, but the threads I found for this topic did not really help me with this specific problem. I would like to achieve the following working: Image 1 is displayed. If you press the left arrow key (keydown) the image should change to image 2. If you stop pressing (keyup), it should change to image 3. If you press the right arrow key it should change to image 4 and on keyup, change to image 5. The code is: <img src

TinyMCE - Adding Event Listeners Issue

由 核能气质少年 提交于 2019-12-24 05:32:24
问题 I'm stuck on understanding how to setup event handlers for my tinymce editors. This post may get long, so my apologies. I'm reading up on this post, which is exactly what I want to do: I may be instantiating my TinyMCE editor instances in a way that is confusing me with extending it's power. On my sites, I mostly have my editors doing the most simple, bare-bones work. And now I'm on a page that I want to reflect onkeyup changes to be displayed in <div id="displayHtml"> (similar to what SOF is

Javascript event doesn't seem to get added to a dynamically generated textbox

由 ◇◆丶佛笑我妖孽 提交于 2019-12-24 03:43:57
问题 I added onkeyup javascript for a dynamically added textbox in javascript... But it doesnt seem to work.... var cell4 = row.insertCell(3); cell4.setAttribute('align','center') var e3 = document.createElement('input'); e3.type = 'text'; e3.name = 'txtqt' + iteration; e3.id = 'txtqt' + iteration; e3.onkeyup = totalAmount(event,this,'tblsample');//Adding this lines doesnt work e3.size = 10; cell4.appendChild(e3); But when i used e3.onkeyup = totalAmount; It worked... Here is my javascript
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