onfocus | 易学教程

Is it possible to write onFocus/lostFocus handler for a DIV using JS or jQuery?

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I have a div and when the user clicks the div a function should be called. And when the user clicks something else (anything other than this div) another function should be called. So basically i need to have onFocus() and lostFocus() function calls associated with this DIV. Is it available in JavaScript or even in jQuery? Thanks. Here i created a Working demo of what you want http://jsfiddle.net/kPbfL/1/ You need to add tabindex attribute to div : Markup: <div id="mydiv" tabindex="-1"></div> Javascript $("#mydiv").focusin(function() { $("#mydiv").css("background","red"); }); $("#mydiv")

jQuery onchange/onfocus select box to display an image?

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I need some help finding a jQuery plugin which will allow me to display an image preview from a select list of images - onfocus/onchange.. Example: <select name="image" id="image" class="inputbox" size="1"> <option value=""> - Select Image - </option> <option value="image1.jpg">image1.jpg</option> <option value="image2.jpg">image2.jpg</option> <option value="image3.jpg">image3.jpg</option> </select> <div id="imagePreview"> displays image here </div> Has anyone come across something like this? I've tried searching for it to no avail.. Thank you! I'm not sure you need a plugin to deal with this:

react-navigation: Detect when screen, tabbar is activated / appear / focus / blur

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问题 Perviously when I wanted to make some actions when screen is opened I put them inside componentDidMount. For example I can fetch some data. like this. componentDidMount() { this.updateData(); } But with react-navigation componentDidMount occurs only one time when user open screen first time, and if later user open this page again it will not trigger componentDidMount. What is proper way to detect when page(screen) is activated and do actions? 回答1: With react-navigation , you can do that.

MFC on screen keyboard when focusing editable control

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问题 I want to do a thing conceptually simple as this: For every control that accepts keyboard input(CEdit, CCombobox with Editable text, etc.), when the control is focused and enabled, make the On Screen Keyboard appear. Preferably with accessibility support (I've done some reading about Microsoft User Interface Automation) rather than calling directly the osk.exe utility. A thing very like the touchscreen smartphones when the user puts the focus on an editable control. UPDATE: If there is a

Is it possible to write onFocus/lostFocus handler for a DIV using JS or jQuery?

阅读更多关于 Is it possible to write onFocus/lostFocus handler for a DIV using JS or jQuery?

问题 I have a div and when the user clicks the div a function should be called. And when the user clicks something else (anything other than this div) another function should be called. So basically i need to have onFocus() and lostFocus() function calls associated with this DIV. Is it available in JavaScript or even in jQuery? Thanks. 回答1: Here i created a Working demo of what you want http://jsfiddle.net/kPbfL/1/ You need to add tabindex attribute to div : Markup: <div id="mydiv" tabindex="-1"><

Set cursor at a length of 14 onfocus of a textbox

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Hai Guys, I want to set cursor at a position of length 14 on a textbox which will not have a value.. Iknow initially cursor will be at 0 i want it to be at 14 IE use different approach at setting cursor position than Firefox,Opera and Chrome. It's better to make a helper function, which will do it for you. I use this one for own needs. function setCursor(node,pos){ node = (typeof node == "string" || node instanceof String) ? document.getElementById(node) : node; if(!node){ return false; }else if(node.createTextRange){ var textRange = node.createTextRange(); textRange.collapse(true); textRange

jQuery onchange/onfocus select box to display an image?

阅读更多关于 jQuery onchange/onfocus select box to display an image?

问题 I need some help finding a jQuery plugin which will allow me to display an image preview from a select list of images - onfocus/onchange.. Example: <select name="image" id="image" class="inputbox" size="1"> <option value=""> - Select Image - </option> <option value="image1.jpg">image1.jpg</option> <option value="image2.jpg">image2.jpg</option> <option value="image3.jpg">image3.jpg</option> </select> <div id="imagePreview"> displays image here </div> Has anyone come across something like this?

Set cursor at a length of 14 onfocus of a textbox

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问题 Hai Guys, I want to set cursor at a position of length 14 on a textbox which will not have a value.. Iknow initially cursor will be at 0 i want it to be at 14 回答1: IE use different approach at setting cursor position than Firefox,Opera and Chrome. It's better to make a helper function, which will do it for you. I use this one for own needs. function setCursor(node,pos){ node = (typeof node == "string" || node instanceof String) ? document.getElementById(node) : node; if(!node){ return false;