As there is only one element with .row class, index () returns the index 0 as it is zero-based. Difference between DOM parentNode and parentElement. (A modification to) Jon Prez Laraudogoitas "Beautiful Supertask" What assumptions of Noether's theorem fail?
javascript - How to get index of element by parent in JQuery - Stack The occasional iteration isn't a big deal (e.g. Not the answer you're looking for? I would prefer to use native js. rev2023.7.24.43543. js document.getElementById("main").getElementsByClassName("test"); Get the first element with a class of 'test', or undefined if there is no matching element: js document.getElementsByClassName("test")[0]; We can also use methods of Array.prototype on any HTMLCollection by passing the HTMLCollection as the method's this value. JavaScript: How to get parent element by selector? Thanks for any advice. Trying some animation effect with css when sub-categories opens and hide.
javascript - Retrieve index of HTML element within parent - Code Review Your optimization failed to meet the requirement: Well, it actually did a little better than I expected in Firefox, but overall it's not terribly fast and slower than some other solutions. See more numbers/statistics. It takes a selector as an argument and returns the first matching ancestor or null if there isn't one. It will throw TypeError if node has no parent (add a check for node.parentNode !== undefined if you care about that case). Yep. Thanks for contributing an answer to Stack Overflow! Get the element with the specified id: document.getElementById("demo"); Try it Yourself Get the element and change its color: const myElement = document.getElementById("demo"); myElement.style.color = "red"; Try it Yourself Or just change its color: document.getElementById("demo").style.color = "red"; Try it Yourself Description Use our color picker to find different RGB, HEX and HSL colors, W3Schools Coding Game! When you say you want to find the count, dont you mean the index?
javascript - Finding DOM node index - Stack Overflow rev2023.7.24.43543.
How to get child-index of html element using javascript Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982023 by individual mozilla.org contributors. The target property on the event object is useful when you need a generic way Can somebody be charged for having another person physically assault someone for them? I guess the childNodes collection is implemented as a linked list in the engine, hence why binary search won't work efficiently. The childNodes list includes text and element nodes-. 593), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. Can a Rogue Inquisitive use their passive Insight with Insightful Fighting? there are no calss on sub-categories (sub-cat-menu is to style and hidden sub-categories), could figure out much as im newbie to javascript. +1. Difference in meaning between "the last 7 days" and the preceding 7 days in the following sentence in the figure". How does hardware RAID handle firmware updates for the underlying drives? For example, check out the following demo.
You dont show us what youve tried for #2, so i cant suggest why it doesnt work. What its like to be on the Python Steering Council (Ep. Airline refuses to issue proper receipt. How feasible is a manned flight to Apophis in 2029 using Artemis or Starship? These elements form hierarchy such as parent to child.
Thanks for contributing an answer to Stack Overflow! It was a CSS class on the element that I was looking for. Array.prototype.findIndex () The findIndex () method returns the index of the first element in an array that satisfies the provided testing function. Does glide ratio improve with increase in scale? All browser compatibility updates at a glance, Frequently asked questions about MDN Plus. However, after viewing the results in Chrome, the results are the opposite of what was expected. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Making statements based on opinion; back them up with references or personal experience. Add event listener on the document and just check whether the current element is present in the children's of the parent element. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Internet Explorer 6, 7 and 8 supported it, but erroneously includes Comment nodes. I have removed the jquery tag. @user1689607, I wasn't aware that jQuery data was THAT slow. Because indexOf is on Array.prototype and parent.children is a NodeList, you have to use call(); It's kind of ugly but it's a one liner and uses functions that any javascript dev should be familiar with anyhow.
Asking for help, clarification, or responding to other answers. What information can you get with only a private IP address? What should I do after I found a coding mistake in my masters thesis? How to determine the index of the element in its parent node? Approach 1: Select an element whose child element is going to be selected. Source: https://stackoverflow.com/a/58845058/3626361 (leave him an Up vote if it helped you). My first attempt was using .parentNode.childNodes but that gives incorrect results due to text nodes. Using feature detection and .previousElementSibling yields a 7x improvement (on Chrome), I have yet to test it on IE8. Web technology reference for developers.
Get the ID of a Parent element on Click using JavaScript var child = document.getElementById ('my_element'); var parent = child.parentNode; var childNodes = parent.childNodes; var count = childNodes.length; var child_index; for (var i = 0; i < count; ++i) { if (child === childNodes [i]) { child_index = i; break; } } Is there a better way to determine the child's index? If your element is
or | , you can use the rowIndex/cellIndex property. And will open. For just elements this can be used to find the index of an element amongst it's sibling elements: function getElIndex (el) { for (var i = 0; el = el.previousElementSibling; i++); return i; } Note that previousElementSibling isn't supported in IE<9. If a window does not have a parent, its parent property is a reference to 592), How the Python team is adapting the language for an AI future (Ep. there are no calss on sub-categories (sub-cat-menu is to style and hidden sub-categories) class:tako-open is only added on sub-categories when click on main-categories as by default sub-categories are hidden. 10. This is what you want probably about 90% of the time, possibly more. Syntax element .children Return Value More Examples How many children does "myDIV" have: let count = document.getElementById("myDIV").children.length; Try it Yourself Change the background of the second child element of "myDIV": const collection = document.getElementById("myDIV").children; collection [1].style.backgroundColor = "yellow"; Always happy to see good code beat jQuery to shit in performance. "/\v[\w]+" cannot match every word in Vim. $ (this).closest ('.col').index () 593), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. how to find index of nested element in jquery? Structure of content on the web. How does hardware RAID handle firmware updates for the underlying drives? Why is this Etruscan letter sometimes transliterated as "ch"? Is it possible to get element's numerical index in its parent node without looping? You can console.log the target property to see which DOM element was clicked While using W3Schools, you agree to have read and accepted our, An Element object, representing the parent element node of a node, or. Is this mold/mildew? 593), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. Find centralized, trusted content and collaborate around the technologies you use most. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Is it possible to get element's numerical index in its parent node without looping? Thanks for any advice. Option #1 here is the only one listed on this page that worked for me. indexOf You can apply indexOf because you now have an Array object. When a window is loaded in an |