Detailed explanation of how to use css and javascript (techniques)

As two important technologies in modern web design, CSS and JavaScript can make websites more beautiful and interactive. This article will introduce how to master the use of these two technologies and help readers improve their web design capabilities.

1. CSS skills

CSS (Cascading Style Sheet) is a language used to control the style of HTML files. Generally speaking, CSS has three main functions:

1. Designing page styles.
2. Define web page structure.
3. Change the behavior of elements in the web page.

Here are some CSS tips that can be applied to your web design:

1. Using the box model

The Box-sizing property can Help us better understand and use the box model. The CSS box model means that each element in an HTML document is wrapped in a box. The model includes four parts: content, padding, borders, and margins. Using the box model helps you have more control over the layout and style of your web pages.

2. Streamline the code

Writing beautiful code is not just about looking good, but more importantly, it can improve the page speed of the website. Using a code compressor can make your code easier to maintain, reduce code size, and improve code readability, so that it can be better applied to website design and development.

3. Using CSS Frameworks

CSS frameworks are prepared for developing "themed" style websites, which usually have predefined areas and grid systems. They use consistent CSS and JavaScript code to improve page consistency and usability, making it easy to optimize your website.

4. Scroll Effect

CSS scroll effect is very popular. The scrolling effect is a dynamic effect that can create a wonderful UI interface through a "third party". For example, a variety of "transition animations" can make the website more vivid. To add scrolling effects to your website design, you can use CSS Transition and CSS Animation traits.

5. Background style

Background style can help the website design to be more beautiful. A custom background with a gradient color can make the website more dynamic, while a background with a colored background pattern can make the website more visually impactful.

2. JavaScript skills

JavaScript is a programming language commonly used to add interactivity to web pages. Here are some JavaScript tips you can apply to your website design:

1. Simplify the code

Writing concise JavaScript code is crucial. JavaScript code can be optimized by removing duplicate code and repeated access to SQL statements. Simplifying JavaScript code can help website designers focus on this area of ​​the development program and improve development efficiency.

2. Determine run time

Calculating code run time helps in proper optimization. The console.time() and console.timeEnd() functions in the JavaScript standard library can calculate code execution time. Using these functions, you can find the most time-consuming sections of code and optimize them.

3. Event Listening

Events are one of the most important concepts in JavaScript. Through events, JavaScript can respond to user operation events, such as keyboard keys, mouse clicks, window resizing, etc. In order to make your code more modular, concise and flexible, you can use event listeners, which can simplify JavaScript code and improve the readability and maintainability of the program.

4. Debug interface

Use the Debug interface to analyze JavaScript program errors. Using the Debug interface can more effectively eliminate errors and debug code. Using a debugger can help better diagnose JavaScript applications.

5. JS Framework

A JavaScript framework is a predetermined collection of classes and functions to make writing web applications easier and more efficient. They are libraries that provide various functions and classes for the most common programming tasks. JavaScript frameworks usually include jQuery, Vue, React, etc.

In short, mastering the use of CSS and JavaScript technologies is an indispensable part of web design. They can help you improve the beauty, interactivity and page speed of your website. I hope the tips provided above will be helpful to everyone in learning CSS and JavaScript in website design.

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