event-handling

问题 I need to figure out which character was typed into a text field from within the handler that is called by jQuery's keydown function. key.which gives me only the keycode, but I need to figure out which ASCII character key represents. How do I do this? 回答1: For character input, it is suggested you use keypress() , which will report the actual ASCII code for the character pressed. It automatically takes care of letter case, and ignores non-character presses. In either case, you can use

问题 I am learning to use react.js and have some issues to use the event handlers. The final question would be: Is it possible to use server side rendering and send event handlers to the client automaticly? Here is my example: I have an index.jsx which I render server side and send to the client var React = require("react"); var DefaultLayout = require("./layout/default"); var LikeButton = React.createClass({ getInitialState: function() { return {liked: false}; }, handleClick: function(event) {

问题 In order to add events we could use this simple 1st solution : function AddEvent(html_element, event_name, event_function) { if(html_element.attachEvent) //Internet Explorer html_element.attachEvent("on" + event_name, function() {event_function.call(html_element);}); else if(html_element.addEventListener) //Firefox & company html_element.addEventListener(event_name, event_function, false); //don't need the 'call' trick because in FF everything already works in the right way } or this 2nd

问题 In order to add events we could use this simple 1st solution : function AddEvent(html_element, event_name, event_function) { if(html_element.attachEvent) //Internet Explorer html_element.attachEvent("on" + event_name, function() {event_function.call(html_element);}); else if(html_element.addEventListener) //Firefox & company html_element.addEventListener(event_name, event_function, false); //don't need the 'call' trick because in FF everything already works in the right way } or this 2nd

问题 How can I write the JavaScript callback code that will be executed on any changes in the URL anchor? For example from http://example.com#a to http://example.com#b 回答1: Google Custom Search Engines use a timer to check the hash against a previous value, whilst the child iframe on a seperate domain updates the parent's location hash to contain the size of the iframe document's body. When the timer catches the change, the parent can resize the iframe to match that of the body so that scrollbars

问题 How can I write the JavaScript callback code that will be executed on any changes in the URL anchor? For example from http://example.com#a to http://example.com#b 回答1: Google Custom Search Engines use a timer to check the hash against a previous value, whilst the child iframe on a seperate domain updates the parent's location hash to contain the size of the iframe document's body. When the timer catches the change, the parent can resize the iframe to match that of the body so that scrollbars

问题 I have a Word userform with 60+ controls of varying types. I would like to evaluate the form every time a control_change event is triggered and change the enabled state of the form's submit button. However, I really don't want to write and maintain 60 on change event handlers. 回答1: You can create an event-sink class that will contain the event-handling code for all of your controls of a particular type. For example, create the a class called TextBoxEventHandler as follows: Private WithEvents

问题 I have a Word userform with 60+ controls of varying types. I would like to evaluate the form every time a control_change event is triggered and change the enabled state of the form's submit button. However, I really don't want to write and maintain 60 on change event handlers. 回答1: You can create an event-sink class that will contain the event-handling code for all of your controls of a particular type. For example, create the a class called TextBoxEventHandler as follows: Private WithEvents

问题 This question already has answers here : Adding event listeners to dynamically added elements using jQuery [duplicate] (4 answers) Closed 5 years ago . It's very easy to event-handle when dealing with items the document has from the get go: $(document).ready(function() { $('.element-in-question').on("event", function (event) { //do what you need to do during the event }); }); My problem is how would I best deal with dynamic elements. For example, let's say I dynamically load notifications,

问题 I have been trying to find out more about mouse events such as onmouseover , onmouseout and onmousemove but there is not much info. It seems these event handlers by default have a single argument, the event its self. element.onmouseover = mouseoverFunction function mouseoverFunction( event ) { // Do stuff here } However I want to be able to pass other arguments to into the function. function mouseoverFunction( event, moreArgs ) { // Do stuff here } How do I pass the event argument and