onload-event

Images onload in one function

由 核能气质少年 提交于 2021-01-01 06:42:47
问题 I'm trying to learn JavaScript, making my first game. How I can make all images onload in one function and later draw it in the canvas making my code shorter? How can I put a lot of images in an array and later us it in a function. This is my third day of learning JavaScript. Thanks in advance. var cvs = document.getElementById('canvas'); var ctx = cvs.getContext('2d'); //load images var bird = new Image(); var bg = new Image(); var fg = new Image(); var pipeNorth = new Image(); var pipeSouth

onLoadEnd not firing in react native

由 早过忘川 提交于 2020-05-27 05:53:49
问题 I am trying to display GIF from the giphy api on react native. Gifs take time to display on screen so I want to display a spinner on the midtime. The onLoadEnd event seem to be never fired on the Image tag, so the spinner actually runs endlessly because I can never update loading in my state. What am I doing wrong here ? import React, { Component } from 'react'; import { View, Text, ScrollView, Image} from 'react-native'; import axios from 'axios'; import QuoteDetail from './quote_detail'

body onload and window.onload at the same time

由 落花浮王杯 提交于 2020-03-04 15:36:59
问题 Can I use body onload and window.onload at the same time? I've tried it using this code <body onload = "alertFirst()"> </body> <script> window.onload = alertSec; </script> But it didn't work. I just need someone to confirm it to me. Many thanks 回答1: If one or more of the scripts you want to use has the event handler in the BODY HTML tag, you can still move it to into javascript code. See the example below: Script #1: <script language="javascript"> function start(){ ...code for script #1... }

Dynamic Script in IFrame not triggering window.onload

由 ⅰ亾dé卋堺 提交于 2020-02-08 02:59:07
问题 I am dynamically creating an IFrame then adding a script tag to it with code that should execute when the frame loads, however it is never executed. $stage.html("<iframe src='javascript:;' id='frame'></iframe>"); $frame = $("#frame"); frame = $frame[0].contentDocument ? $frame[0].contentDocument : $frame[0].contentWindow.document; script= frame.createElement('script'), head = frame.getElementsByTagName("head")[0]; script.innerHTML = "window.onload = function() { alert('loaded'); }"; head

Why doesn't 'load' event handler bound to an <applet> get called?

由 老子叫甜甜 提交于 2020-01-17 12:41:26
问题 I want a callback that is executed after an <applet> element is loaded: // Create element var $applet = $("<applet></applet>"); // Attach handler $applet.load(function() { alert('applet loaded'); }); // Set attributes $applet.attr({ style: 'position:absolute;left:-1px', name: 'TiddlySaver', code: 'TiddlySaver.class', archive: 'TiddlySaver.jar', width:'1', height:'1', }); Why is the 'load' event handler not executed for an <applet> element? If I change the <applet> to an <img> element (with

Why doesn't 'load' event handler bound to an <applet> get called?

由 柔情痞子 提交于 2020-01-17 12:41:09
问题 I want a callback that is executed after an <applet> element is loaded: // Create element var $applet = $("<applet></applet>"); // Attach handler $applet.load(function() { alert('applet loaded'); }); // Set attributes $applet.attr({ style: 'position:absolute;left:-1px', name: 'TiddlySaver', code: 'TiddlySaver.class', archive: 'TiddlySaver.jar', width:'1', height:'1', }); Why is the 'load' event handler not executed for an <applet> element? If I change the <applet> to an <img> element (with

How to fire event handlers after AJAX content has loaded in JQuery

由 半世苍凉 提交于 2020-01-15 12:44:45
问题 I'm trying to use an AJAX request to load some information into a table using JQuery. I can load the content easily but I am having problems adding event handlers to apply style on the loaded content. I am applying a striping widget to the table. However when my AJAX request comes back and my information is appended to the table body it does not have the style applied. The JQuery tutorial mentions using the load event to handle this, but I can't get it to work. Any help would be appreciated.

Page On load event in JSF

由 ⅰ亾dé卋堺 提交于 2020-01-06 08:13:47
问题 I am trying to assign values to my dropdown during page load. I followed the way which is given in this link. Invoke JSF managed bean action on page load As per the link, i have tried using both the annotation and constructor type. but its an exception for me, SEVERE: An exception occurred javax.faces.FacesException: java.lang.reflect.InvocationTargetException Caused by: java.lang.reflect.InvocationTargetException Caused by: javax.el.ELException: Detected cyclic reference to managedBean

Page On load event in JSF

由 ∥☆過路亽．° 提交于 2020-01-06 08:12:13
问题 I am trying to assign values to my dropdown during page load. I followed the way which is given in this link. Invoke JSF managed bean action on page load As per the link, i have tried using both the annotation and constructor type. but its an exception for me, SEVERE: An exception occurred javax.faces.FacesException: java.lang.reflect.InvocationTargetException Caused by: java.lang.reflect.InvocationTargetException Caused by: javax.el.ELException: Detected cyclic reference to managedBean

How to run a function when CSS stylesheet finishes loading

由 别等时光非礼了梦想. 提交于 2020-01-06 05:43:04
问题 How do I run a function when a stylesheet finishes loading? Here is my code.. var d = document, css = d.head.appendChild(d.createElement('link')) css.rel = 'stylesheet'; css.type = 'text/css'; css.href = "https://unpkg.com/tachyons@4.10.0/css/tachyons.css" 回答1: According to MDN's <link>: The External Resource Link element, You can determine when a style sheet has been loaded by watching for a load event to fire on it; similarly, you can detect if an error has occurred while processing a style
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