Some CSS styling basics
You will encounter some basic knowledge of CSS during your study. This article introduces some basic knowledge of CSS styles.
How many ways are there to introduce the style? What is the difference between link and @import
There are three ways to introduce the style, which are:
External introduction
Mainly used The link tag or @import tag introduces a style file with the suffix .css from the outside. The syntax is:
.css" >
.css);
Write the style in the current tag, the syntax is:
<style>
p {color:red; text-align:center;
}</style>InlineAdd the style within the opening tag of the style you want to add (cannot be added in the closing tag), the syntax is:
I am P tag content
The main difference between link and @import is:
The difference in browser loading order. (Load link first, then load @import)
link has better general compatibility than @import
link supports using JS to control the DOM to change the style; while @import does not support
What are the differences between file paths ../main.css, ./main.css, and main.css
../main.css represents the main.css file in the upper-level directory
./main.css represents the main.css file in the current directory.
main.css represents the main.css file in the current directory, which is equivalent to ./main.css.
What is console.log used for? The
console.log is mainly used for development and debugging, and displays the debugged object in the console of the inspection element. The function is equivalent to: alert() (not very understandable, need to be studied in depth)
text-align: What is justify
It is mainly used to adjust the gap in the middle to align both sides in the layout of large text.
What are px, em and rem? What's the difference? How to use
px as the pixel unit is generally hard-coded and there will be no other interference factors.
em and rem are relative units and are changeable. em is the change in unit size relative to the parent element, and rem is the change in unit size relative to the root node. For example:
<!DOCTYPE html><html style="font-size:15px"> <!--这里是根节点，设置为15px--><head> <title>px.em.rem区别</title></head> <body>我是body内容 <h1>我是标题内容</h1> <div style="font-size:2em;border:red 1px solid"><!--em相对于父级html，html为15px，2em相当于30px--> 我是div内容 <p style="font-size:2em">我是em</p> <!--em相对于父级div,div为30px，2em相当于60px--><p style="font-size:2rem">我是rem</p><!--rem是相对于根节点，根节点为15px，2rem相当于30px--></div></body></html>
This article introduces the basic knowledge of css style. For more related content, please pay attention to the php Chinese website.
Related recommendations:
Some basic questions about JS
##How to modularize require.js with front-end js
An example of a button realized with a picture using CSS
The above is the detailed content of Some CSS styling basics. For more information, please follow other related articles on the PHP Chinese website!
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
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to use bootstrap in vue
Apr 07, 2025 pm 11:33 PM
Using Bootstrap in Vue.js is divided into five steps: Install Bootstrap. Import Bootstrap in main.js. Use the Bootstrap component directly in the template. Optional: Custom style. Optional: Use plug-ins.
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
How to write split lines on bootstrap
Apr 07, 2025 pm 03:12 PM
There are two ways to create a Bootstrap split line: using the tag, which creates a horizontal split line. Use the CSS border property to create custom style split lines.
How to set up the framework for bootstrap
Apr 07, 2025 pm 03:27 PM
To set up the Bootstrap framework, you need to follow these steps: 1. Reference the Bootstrap file via CDN; 2. Download and host the file on your own server; 3. Include the Bootstrap file in HTML; 4. Compile Sass/Less as needed; 5. Import a custom file (optional). Once setup is complete, you can use Bootstrap's grid systems, components, and styles to create responsive websites and applications.
How to insert pictures on bootstrap
Apr 07, 2025 pm 03:30 PM
There are several ways to insert images in Bootstrap: insert images directly, using the HTML img tag. With the Bootstrap image component, you can provide responsive images and more styles. Set the image size, use the img-fluid class to make the image adaptable. Set the border, using the img-bordered class. Set the rounded corners and use the img-rounded class. Set the shadow, use the shadow class. Resize and position the image, using CSS style. Using the background image, use the background-image CSS property.
How to use bootstrap button
Apr 07, 2025 pm 03:09 PM
How to use the Bootstrap button? Introduce Bootstrap CSS to create button elements and add Bootstrap button class to add button text
How to resize bootstrap
Apr 07, 2025 pm 03:18 PM
To adjust the size of elements in Bootstrap, you can use the dimension class, which includes: adjusting width: .col-, .w-, .mw-adjust height: .h-, .min-h-, .max-h-
