search
HomeWeb Front-endJS TutorialJavaScript method to get the next node of dom
JavaScript method to get the next node of domMay 05, 2018 am 11:34 AM
javascriptjsNext

This article mainly introduces the method of obtaining the next node of dom using javascript to achieve the accumulation of numbers by clicking the add and subtract button on the page. Friends who need it can refer to the following

Use javascript to write a method of adding and subtracting by clicking on the page. Buttons realize the accumulation of numbers.

Simple html is probably like this. Just understand and don’t care about these details

<input type="button" value="+" onclick="jia(this)" />
<label class="num">0</label>
<input type="button" value="-" onclick="jian(this)" />

It looks like this

javascript code is as follows

<script type="text/javascript">
function jia(a)
{
var nextnode = a.nextElementSibling;//获取下一个节点

alert(nextnode.innerHTML);
var a = parseInt(nextnode.innerHTML)
a += 1;
nextnode.innerHTML = a;
}
function jian(a) {
var previousnode = a.previousElementSibling;
var a = parseInt(previousnode.innerHTML)
a -= 1;
a = a > 0 ? a : 0;
previousnode.innerHTML = a;
}
</script>


Explain:

function jian(a) and

function jia(a) is the currently clicked object. Add this to the method connected to the onclick event;

- nextElementSibling gets the next node of the current node (gets the next sibling node)
- previousElementSibling gets the previous node of the current node

Note: IE will skip the space document nodes (such as line feed characters) generated between nodes, but Mozilla will not do this - FF will treat layout elements such as space breaks and line feeds as node reads, so in IE The next node element that can be read using nextSibling in FF needs to be written like this: nextElementSibling.

The above explanation means using nextElementSibling and previousElementSibling to obtain the next sibling node and the previous sibling node. You can remove line breaks, spaces, etc., and directly find our label element. But the following two

nextSibling
previousSibling also refer to the next sibling node and the previous sibling node, but they are easy to use in IE
------------ --------Keyword explanation

parseInt conversion function.

a = a > 0 ? a : 0;----ternary expression.

Related recommendations:

JavaScript to get HTTP information in the navigation bar example sharing

JavaScript to get cookies and delete cookies detailed explanation

The above is the detailed content of JavaScript method to get the next node of dom. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
es6数组怎么去掉重复并且重新排序es6数组怎么去掉重复并且重新排序May 05, 2022 pm 07:08 PM

去掉重复并排序的方法:1、使用“Array.from(new Set(arr))”或者“[…new Set(arr)]”语句,去掉数组中的重复元素,返回去重后的新数组;2、利用sort()对去重数组进行排序,语法“去重数组.sort()”。

JavaScript的Symbol类型、隐藏属性及全局注册表详解JavaScript的Symbol类型、隐藏属性及全局注册表详解Jun 02, 2022 am 11:50 AM

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于Symbol类型、隐藏属性及全局注册表的相关问题,包括了Symbol类型的描述、Symbol不会隐式转字符串等问题,下面一起来看一下,希望对大家有帮助。

原来利用纯CSS也能实现文字轮播与图片轮播!原来利用纯CSS也能实现文字轮播与图片轮播!Jun 10, 2022 pm 01:00 PM

怎么制作文字轮播与图片轮播?大家第一想到的是不是利用js,其实利用纯CSS也能实现文字轮播与图片轮播,下面来看看实现方法,希望对大家有所帮助!

JavaScript对象的构造函数和new操作符(实例详解)JavaScript对象的构造函数和new操作符(实例详解)May 10, 2022 pm 06:16 PM

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于对象的构造函数和new操作符,构造函数是所有对象的成员方法中,最早被调用的那个,下面一起来看一下吧,希望对大家有帮助。

JavaScript面向对象详细解析之属性描述符JavaScript面向对象详细解析之属性描述符May 27, 2022 pm 05:29 PM

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于面向对象的相关问题,包括了属性描述符、数据描述符、存取描述符等等内容,下面一起来看一下,希望对大家有帮助。

javascript怎么移除元素点击事件javascript怎么移除元素点击事件Apr 11, 2022 pm 04:51 PM

方法:1、利用“点击元素对象.unbind("click");”方法,该方法可以移除被选元素的事件处理程序;2、利用“点击元素对象.off("click");”方法,该方法可以移除通过on()方法添加的事件处理程序。

整理总结JavaScript常见的BOM操作整理总结JavaScript常见的BOM操作Jun 01, 2022 am 11:43 AM

本篇文章给大家带来了关于JavaScript的相关知识,其中主要介绍了关于BOM操作的相关问题,包括了window对象的常见事件、JavaScript执行机制等等相关内容,下面一起来看一下,希望对大家有帮助。

20+道必知必会的Vue面试题(附答案解析)20+道必知必会的Vue面试题(附答案解析)Apr 06, 2021 am 09:41 AM

本篇文章整理了20+Vue面试题分享给大家,同时附上答案解析。有一定的参考价值,有需要的朋友可以参考一下,希望对大家有所帮助。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)