在平时的工作中有时候会碰到需要获取元素当前样式的问题，查了一下可以用getComputedStyle这个方法来获取元素计算后的样式（有些我们在css里面没有写的，浏览器默认的样式也可以获得）
getComputedStyle的使用
getComputedStyle接收两个参数，第一个参数是一个元素，第二个参数是一个可选的伪元素。
getComputedStyle方法返回一个包含所有样式的对象，可以通过length方法获取这个对象的长度。
获取元素某个css属性的值
获取元素css属性值的方法有两种，一种是通过getComputedStyle方法返回的对象调用getPropertyValue方法，这个方法接收一个属性名作为参数，返回属性值。(这个方法的参数不必采用驼峰的写法，如想要获取背景颜色，直接传入"background-color"即可)
另外一种方法是直接使用getComputedStyle方法返回的对象的索引。
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <style> div{ background: red; width: 300px; height: 300px; } </style></head><body><div id="box" style="width: 100px"></div></body><script> var box = document.getElementById("box"); var styleList = window.getComputedStyle(box); console.log(styleList.length); //262 (chrome下) console.log(styleList.width); //100px console.log(styleList.height); //300px console.log(styleList.backgroundColor); //rgb(255, 0, 0) console.log(styleList.getPropertyValue("background-color")); //rgb(255, 0, 0)</script></html> 参考：https://css-tricks.com/get-value-of-css-rotation-through-javascript/
获取元素CSS值之getComputedStyle方法熟悉-张鑫旭
Explain the importance of using consistent coding style for HTML tags and attributes.May 01, 2025 am 12:01 AMA consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.
How to implement multi-project carousel in Bootstrap 4?Apr 30, 2025 pm 03:24 PMSolution to implement multi-project carousel in Bootstrap4 Implementing multi-project carousel in Bootstrap4 is not an easy task. Although Bootstrap...
How does deepseek official website achieve the effect of penetrating mouse scroll event?Apr 30, 2025 pm 03:21 PMHow to achieve the effect of mouse scrolling event penetration? When we browse the web, we often encounter some special interaction designs. For example, on deepseek official website, �...
How to modify the playback control style of HTML videoApr 30, 2025 pm 03:18 PMThe default playback control style of HTML video cannot be modified directly through CSS. 1. Create custom controls using JavaScript. 2. Beautify these controls through CSS. 3. Consider compatibility, user experience and performance, using libraries such as Video.js or Plyr can simplify the process.
What problems will be caused by using native select on your phone?Apr 30, 2025 pm 03:15 PMPotential problems with using native select on mobile phones When developing mobile applications, we often encounter the need for selecting boxes. Normally, developers...
What are the disadvantages of using native select on your phone?Apr 30, 2025 pm 03:12 PMWhat are the disadvantages of using native select on your phone? When developing applications on mobile devices, it is very important to choose the right UI components. Many developers...
How to optimize collision handling of third-person roaming in a room using Three.js and Octree?Apr 30, 2025 pm 03:09 PMUse Three.js and Octree to optimize collision handling of third-person roaming in the room. Use Octree in Three.js to implement third-person roaming in the room and add collisions...
What problems will you encounter when using native select on your phone?Apr 30, 2025 pm 03:06 PMIssues with native select on mobile phones When developing applications on mobile devices, we often encounter scenarios where users need to make choices. Although native sel...
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
SublimeText3 English version
Recommended: Win version, supports code prompts!
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.
