htmlcollection

What is the difference between a HTMLCollection and a NodeList in DOM?

由 ╄→гoц情女王★ 提交于 2019-12-08 15:09:38
问题 I tried my Google-fu but I can't seem to find any good answer to that question. Please help. EDIT: Ok so I found this blog post. So they come from different DOM levels, but besides that it doesn't say much... 回答1: As you said, NodeList is defined in DOM-Level-3-Core and HTMLCollection in DOM-Level-2-HTML. Their interfaces are : interface HTMLCollection { readonly attribute unsigned long length; Node item(in unsigned long index); Node namedItem(in DOMString name); }; interface NodeList { Node

HTMLCollection appearing in console with many elements but has length 0

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-08 00:00:32
There are a bunch of span elements on the page that I'm trying to grab that are formatted like so: <div class="ca-evp1 te" style="color:#2952A3"> <span class="te-t">11am </span> <span class="te-s">Antoine Diel</span> </div> So, I decided to select them using getElementsByClassName() and then iterate over this HTMLCollection, which when I view in the developer console shows 32 items but when I check the length property it is 0. var toType = function(obj) { return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase() } var eventToClick = document.getElementsByClassName('te-s'); console

Getting values from an HTMLCollection to a string

由 旧巷老猫 提交于 2019-12-06 13:09:16
I am attempting to grab the selected values of a multi-select dropdown and convert them into a single string for later manipulation. At the moment I have the following code: HTML: <select id="genreList" multiple="multiple" name="addGenre[]" style="width: 150px;font-size: 10pt;"> <option value="Action">Action</option> <option value="Comedy">Comedy</option> <option value="Fantasy">Fantasy</option> <option value="Horror">Horror</option> <option value="Mystery">Mystery</option> <option value="Non-Fiction">Non-Fiction</option> <option value="Period">Period</option> <option value="Romance">Romance<

Can't access the value of HTMLCollection

由 风格不统一 提交于 2019-12-05 19:41:46
test.html <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Untitled Document</title> <script> var eles = document.getElementsByClassName('review'); console.log(eles); console.log(eles.length); console.log(eles[0]); // for(var i=0, max=eles.length) </script> </head> <body> <div class="review"></div> <div class="review"></div> <div class="review"></div> <div class="review"></div> <div class="review"></div> </body> I checked eles represents HTMLCollenction. Here says HTMLCollection also exposes its members directly as

JavaScript HtmlCollection loop never returns second element

由 耗尽温柔 提交于 2019-12-04 06:20:40
问题 i know there are answers on how to access and iterate over a HtmlCollection, but it just doesn't work for me here: I got some elements with the class "tabSheetActive", the amount of these can be 1 or more. I access them with: var activeTabSheets = document.getElementsByClassName('tabSheetActive'); console.log('Active sheets amount: ' + activeTabSheets.length); // outputs 2 Logging the collection outputs the following: [div.tabSheetActive.sheet_512_0, div.tabSheetActive.sheet_512_0] After that

JavaScript HtmlCollection loop never returns second element

由 做~自己de王妃 提交于 2019-12-02 08:42:38
i know there are answers on how to access and iterate over a HtmlCollection, but it just doesn't work for me here: I got some elements with the class "tabSheetActive", the amount of these can be 1 or more. I access them with: var activeTabSheets = document.getElementsByClassName('tabSheetActive'); console.log('Active sheets amount: ' + activeTabSheets.length); // outputs 2 Logging the collection outputs the following: [div.tabSheetActive.sheet_512_0, div.tabSheetActive.sheet_512_0] After that i try to iterate over them and manipulate their classes like this: for (var i = 0; i < activeTabSheets

What is the purpose of calling Array.prototype.slice against a NodeList? [duplicate]

由 眉间皱痕 提交于 2019-11-29 04:35:08
This question already has an answer here: Explanation of [].slice.call in javascript? 7 answers how does Array.prototype.slice.call() work? 13 answers Why doesn't nodelist have forEach? 10 answers I was looking up how to iterate NodeLists and I came across the following bit of code. var nodesArray = Array.prototype.slice.call(nodeList); nodesArray.forEach(function(node) { //... }) What is the purpose of calling Array.prototype.slice against a NodeList? What is the purpose of calling Array.prototype.slice against a NodeList? The Array#slice method "returns a shallow copy of a portion of an

What is the purpose of calling Array.prototype.slice against a NodeList? [duplicate]

由 岁酱吖の 提交于 2019-11-27 18:31:25
问题 This question already has an answer here: Explanation of [].slice.call in javascript? 7 answers how does Array.prototype.slice.call() work? 13 answers Why doesn't nodelist have forEach? 10 answers I was looking up how to iterate NodeLists and I came across the following bit of code. var nodesArray = Array.prototype.slice.call(nodeList); nodesArray.forEach(function(node) { //... }) What is the purpose of calling Array.prototype.slice against a NodeList? 回答1: What is the purpose of calling

Are HTMLCollection and NodeList iterables?

由 佐手、 提交于 2019-11-27 09:24:33
In ES6, an iterable is an object that allows for... of , and has a Symbol.iterator key. Arrays are iterables, as are Sets and Maps. The question is: are HTMLCollection and NodeList iterables? Are they supposed to be? MDN documentation seems to suggest a NodeList is an iterable. for...of loops will loop over NodeList objects correctly, in browsers that support for...of (like Firefox 13 and later) This appears to corroborate Firefox's behaviour. I tested the following code in both Chrome and Firefox, and was surprised to find that Firefox seem to think they are iterables, but Chrome does not. In

Are HTMLCollection and NodeList iterables?

由 与世无争的帅哥 提交于 2019-11-26 14:41:19
问题 In ES6, an iterable is an object that allows for... of , and has a Symbol.iterator key. Arrays are iterables, as are Sets and Maps. The question is: are HTMLCollection and NodeList iterables? Are they supposed to be? MDN documentation seems to suggest a NodeList is an iterable. for...of loops will loop over NodeList objects correctly, in browsers that support for...of (like Firefox 13 and later) This appears to corroborate Firefox's behaviour. I tested the following code in both Chrome and
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