getelementbyid

What does document.all mean? [duplicate]

由 旧城冷巷雨未停 提交于 2019-11-28 00:54:24
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: document.all vs. document.getElementById I'm refactoring some old code written by somebody else. And I came across the following snippet: if (document.all || document.getElementById) { ... } When will the code within the if-statement be executed? Thank you! 回答1: document.all() is a non-standard way of accessing DOM elements. It's been deprecated from a few browsers. It gives you access to all sub elements on

vue.js 'document.getElementById' shorthand

由 有些话、适合烂在心里 提交于 2019-11-27 20:21:32
问题 Does vue.js have a shorthand for document.getElementById('#id') like JQuery's $('#id') ? If so, where is the reference for this in the docs so I can locate other information? 回答1: Theres no shorthand way in vue 2. Jeff's method seems already deprecated in vue 2. Heres another way u can achieve your goal. var app = new Vue({ el:'#app', methods: { showMyDiv() { console.log(this.$refs.myDiv); } } }); <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script> <div id='app'> <div

Getting element by a custom attribute using JavaScript

由 倖福魔咒の 提交于 2019-11-27 20:01:59
I have an XHTML page where each HTML element has a unique custom attribute, like this: <div class="logo" tokenid="14"></div> I need a way to find this element by ID, similar to document.getElementById() , but instead of using a general ID, I want to search for the element using my custom "tokenid" attribute. Something like this: document.getElementByTokenId('14'); Is that possible? If yes - any hint would be greatly appreciated. Thanks. It is not good to use custom attributes in the HTML. If any, you should use HTML5's data attributes . Nevertheless you can write your own function that

javascript: getElementById problem in IE

由 丶灬走出姿态 提交于 2019-11-27 18:07:50
问题 I am trying to attach a click event to a check box using JavaScript. Shown below is the HTML and JS. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> <input type="hidden" name="caution_c" value="0"> <input type="checkbox" id="caution_c" name="caution_c" value="1" tabindex="120"> <script type="text/javascript"> var cb = document.getElementById('caution_c'); cb.onclick

document.getElementById(“someId”) Vs. someId

由 自作多情 提交于 2019-11-27 16:08:05
This question might seem silly, but what's the difference between accessing an element (with id "someId") using document.getElementById("someId") Vs. just typing someId ? eg: document.getElementById("someId").style.top = "12px"; vs someId.style.top = "12px"; Here's a sample code http://jsfiddle.net/pRaTA/ (I found that it doesn't work in firefox) The difference is that while someId works in some browsers, document.getElementById("someId") actually complies with the W3C standard. Martin Algesten Declaring a element DOM id doesn't mean it's available as a global variable in all browsers. The

window.onload seems to trigger before the DOM is loaded (JavaScript)

由 点点圈 提交于 2019-11-27 14:47:29
I am having trouble with the window.onload and document.onload events. Everything I read tells me these will not trigger until the DOM is fully loaded with all its resources, it seems like this isn't happening for me: I tried the following simple page in Chrome 4.1.249.1036 (41514) and IE 8.0.7600.16385 with the same result: both displayed the message "It failed!", indicating that myParagraph is not loaded (and so the DOM seems incomplete). <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

It says that TypeError: document.getElementById(…) is null

由 与世无争的帅哥 提交于 2019-11-27 14:31:42
问题 Althought I pushed a parameter to getElementById I wonder from where is this 'is null' error coming from? TypeError: document.getElementById(...) is null [Break On This Error] document.getElementById(elmId).innerHTML = value; Line 75 In addition to this i wonder why title and time did not show unless I click one of these playlist pictures? 回答1: All these results in null : document.getElementById('volume'); document.getElementById('bytesLoaded'); document.getElementById('startBytes'); document

chaining getElementById

由 假装没事ソ 提交于 2019-11-27 09:27:44
I've been looking for an answer to this question but I could find none so I thought I'd try StackOverflow. In javascript, is this valid: x = document.getElementById('myId'); y = x.getElementById('mySecondId'); I know this can be done with getElementsByTagName but I'm not sure if the object returned by getElementById is able to use the getElementById method. I know that the ID is supposed to be unique per document, but sometimes this is just not the case. Thanks! Nope. ...But you can, though: Element.prototype.getElementById = function(id) { return document.getElementById(id); } Try it on this

getElementsByClassName not working but getElementById is

由 拟墨画扇 提交于 2019-11-27 08:49:17
问题 The following code works (alert pops up): var sound = document.getElementById("music"); sound.addEventListener("play", function () { alert("playing"); }); .... .... <audio controls id="music"> <source src="http://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg"/> </audio> But why does this not work? var sound = document.getElementsByClassName("music"); sound.addEventListener("play", function () { alert("playing"); }); .... .... <audio controls class="music"> <source src="http://upload

Javascript Append Child AFTER Element [duplicate]

由 感情迁移 提交于 2019-11-27 06:43:18
This question already has an answer here: How to insert an element after another element in JavaScript without using a library? 17 answers I would like to append an li element after another li inside a ul element using javascript, This is the code I have so far.. var parentGuest = document.getElementById("one"); var childGuest = document.createElement("li"); childGuest.id = "two"; I am familiar with appendChild, parentGuest.appendChild(childGuest); However this appends the new element inside the other, and not after. How can I append the new element after the existing one? Thanks. <ul> <li id=
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