Examples of CSS and JS implementing animation effects during web page loading-CSS Tutorial-php.cn

Home

Web Front-end

CSS Tutorial

Examples of CSS and JS implementing animation effects during web page loading

黄舟

Oct 28, 2017 am 09:34 AM

css javascript

The example in this article shares the specific code of JS to achieve the effect of web page loading for your reference. The specific content is as follows

Required materials:

A loading animated gif image

Basic logic:

Modal box mask + loading.gif animation,
hidden modal box by default
When the page starts sending Ajax request data, the modal box is displayed
The request is completed, and the modal box is hidden

Let’s create a new web application through Django to practice it simply

Practice

1. Create a new Django project, create application app01, configure routing and static, omitted. Place the gif animation in the static folder with the following structure:

#2. define a function in the view, which returns the page test.html:

def test(request):
 return render(request, &#39;test.html&#39;)

Copy after login

3.test.html page is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <!-- 导入css样式 -->
 <link rel="stylesheet" href="/static/css/loading.css" rel="external nofollow" >
 <!-- 导入jquery 和 js文件 -->
 <script src="/static/plugins/jquery-3.2.1.js"></script>
 <script src="/static/js/loading.js"></script>
</head>
<body>

<h1>你好啊，朋友！</h1>
<hr>

<p id="content">
 <p>正在请求服务器数据....</p>
</p>

<!-- 模态框部分 -->
<p class="loading hide">
 <p class="gif"></p>
</p>

</body>
</html>

Copy after login

4.CSS style is as follows:

/* 模态框样式 */
.loading {
 position: fixed;
 top: 0;
 bottom: 0;
 right: 0;
 left: 0;
 background-color: black;
 opacity: 0.4;
 z-index: 1000;
}

/* 动图样式 */
.loading .gif {
 height: 32px;
 width: 32px;
 background: url(&#39;/static/img/loading.gif&#39;);
 position: fixed;
 left: 50%;
 top: 50%;
 margin-left: -16px;
 margin-top: -16px;
 z-index: 1001;
}

Copy after login

Description:

Passed Set position: fixed, and set the top, bottom, left and right to 0, so that the modal box covers the entire page;
Set the gif dynamic image as the background and center it to show the loading effect;
By setting the z-index value, the gif image is suspended above the modal box;
background-color: black; is to make it look obvious, specifically It can be set to white when used;

5.JS file is as follows:

$(function () {
 //准备请求数据，显示模态框
 $(&#39;p.loading&#39;).show();

 $.ajax({
  url: "/ajax_handler.html/",
  type: &#39;GET&#39;,
  data: {},
  success: function (response) {
   var content = response.content;
   $(&#39;#content&#39;).html(content);

   //请求完成，隐藏模态框
   $(&#39;p.loading&#39;).hide();
  },
  error: function () {
   $(&#39;#content&#39;).html(&#39;server error...&#39;);

   //请求完成，隐藏模态框
   $(&#39;p.loading&#39;).hide();
  }
 })
});

Copy after login

Instructions:

After the page is loaded, start sending Ajax requests, Request data from the server-side ajax_handler view, then display the modal box
After the request is completed, regardless of success or failure, hide the modal box

6.ajax_handler view is as follows, it simulates network delay and returns some String:

from django.http import JsonResponse
from django.utils.safestring import mark_safe # 取消字符串转义

def ajax_handler(request):
 # 模拟网络延迟
 import time
 time.sleep(3)

 msg = &#39;&#39;&#39; XXX &#39;&#39;&#39; # 这里你可以随便放入一些字符串

 return JsonResponse({"content": mark_safe(msg)})

Copy after login

The effect is as follows:

The above is the detailed content of Examples of CSS and JS implementing animation effects during web page loading. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website

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

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

Assassin's Creed Shadows: Seashell Riddle Solution

1 months ago By DDD

What's New in Windows 11 KB5054979 & How to Fix Update Issues

3 weeks ago By DDD

Where to find the Crane Control Keycard in Atomfall

1 months ago By DDD

How to fix KB5055523 fails to install in Windows 11?

2 weeks ago By DDD

InZoi: How To Apply To School And University

3 weeks ago By DDD

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

Where is the login entrance for gmail email?

7751

Java Tutorial

1643

CakePHP Tutorial

1398

Laravel Tutorial

1293

PHP Tutorial

1234

Related knowledge

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-

See all articles