Web Front-end
JS Tutorial
Teach you how to use the AngularJS framework to achieve control verification effects with one line of JS code_AngularJS
Teach you how to use the AngularJS framework to achieve control verification effects with one line of JS code_AngularJS
As shown in the picture above, we need to implement the following verification functions:
Controls are all must-lose controls
Both need to control the maximum length
When opening the page for the first time, the control cannot be displayed in an error state
After the input content is cleared, the required input control needs to be displayed in an error state
Only when all inputs are legal can the publish button become available
Through AngularJS, we can easily implement these requirements with only 1 line of JS code. The UI style used here is Bootstrap. Let’s start with the sample code:
HTML.
<!DOCTYPE html>
<html lang="zh-cn" ng-app="ftitApp">
<head>
<meta charset="utf-8" />
<title>Demo</title>
<link href="/Content/bootstrap.css" rel="stylesheet"/>
<script src="/Scripts/angular.js"></script>
</head>
<body>
<div class="container body-content">
<!-- 主要内容区域 -->
<div class="row main-content">
<div class="col-md-9">
<!-- 联系我们表单区域 -->
<form action="/Contact/Create" method="post" role="form" name="createContactForm" ng-controller="ContactCreateController">
<!-- UserName 您的称呼 -->
<div class="form-group has-feedback" ng-class="{'has-success' : !createContactForm.UserName.$pristine && createContactForm.UserName.$valid, 'has-error' : !createContactForm.UserName.$pristine && createContactForm.UserName.$invalid }">
<label for="UserName">您的称呼*</label>
<input type="text" class="form-control" ng-model="userName" name="UserName" autofocus="" required ng-maxlength=30>
<div ng-show="!createContactForm.UserName.$pristine && createContactForm.UserName.$valid">
<span class="glyphicon glyphicon-ok form-control-feedback"></span>
</div>
<div ng-show="!createContactForm.UserName.$pristine && createContactForm.UserName.$invalid">
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
</div>
<!-- UserMail 邮箱地址 -->
<div class="form-group has-feedback" ng-class="{'has-success' : !createContactForm.UserMail.$pristine && createContactForm.UserMail.$valid, 'has-error' : !createContactForm.UserMail.$pristine && createContactForm.UserMail.$invalid }">
<label for="UserMail">邮箱地址*</label>
<input type="email" class="form-control" ng-model="userMail" name="UserMail" required ng-maxlength=30>
<div ng-show="!createContactForm.UserMail.$pristine && createContactForm.UserMail.$valid">
<span class="glyphicon glyphicon-ok form-control-feedback"></span>
</div>
<div ng-show="!createContactForm.UserMail.$pristine && createContactForm.UserMail.$invalid">
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
</div>
<!-- Subject 主题 -->
<div class="form-group has-feedback" ng-class="{'has-success' : !createContactForm.Subject.$pristine && createContactForm.Subject.$valid, 'has-error' : !createContactForm.Subject.$pristine && createContactForm.Subject.$invalid }">
<label for="Subject">主题*</label>
<input type="text" class="form-control" ng-model="subject" name="Subject" required ng-maxlength=100>
<div ng-show="!createContactForm.Subject.$pristine && createContactForm.Subject.$valid">
<span class="glyphicon glyphicon-ok form-control-feedback"></span>
</div>
<div ng-show="!createContactForm.Subject.$pristine && createContactForm.Subject.$invalid">
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
</div>
<!-- Content 内容 -->
<div class="form-group has-feedback" ng-class="{'has-success' : !createContactForm.Content.$pristine && createContactForm.Content.$valid, 'has-error' : !createContactForm.Content.$pristine && createContactForm.Content.$invalid }">
<label for="Content">内容*</label>
<textarea cols="4" rows="5" class="form-control" ng-model="content" name="Content" required ng-maxlength=1000></textarea>
<div ng-show="!createContactForm.Content.$pristine && createContactForm.Content.$valid">
<span class="glyphicon glyphicon-ok form-control-feedback"></span>
</div>
<div ng-show="!createContactForm.Content.$pristine && createContactForm.Content.$invalid">
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
</div>
<!-- 提交按钮 -->
<div class="form-group">
<div ng-show="createContactForm.$valid">
<input type="image" src="/Content/images/comment_publish_button.png" onsubmit="submit();" value="发布" ng-disabled='!createContactForm.$valid' />
</div>
<div ng-show="!createContactForm.$valid">
<img src="/Content/images/invalid_publish_button.png" />
</div>
</div>
</form>
</div>
</div>
</div>
<script src="/Scripts/ftit/ContactCreateController.js"></script>
</body>
</html>JS code (really only one line)
ContractCreateController.js
var ftitAppModule = angular.module('ftitApp', []);That’s it. Let’s explain a few key points:
ng-class: This tag is used to control the value of class. For example, ng-class="{'has-success' : !createContactForm.Content.$pristine} means that if the value of !createContactForm.Content.$pristine is true, the value of class is has-success.
ng-show: Controls whether to display the control.
createContactForm.$valid: After all verifications are passed, the value is true, otherwise it is false
createContactForm.Content.$valid: Identifies whether the Content control passes verification, if passed it is true, otherwise it is false
createContactForm.Content.$pristine: identifies whether the Content control has never been entered. True if never entered, false otherwise
For more detailed technical issues, please check the AngularJS technical documentation.
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
AI Hentai Generator
Generate AI Hentai for free.
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
The latest 5 angularjs tutorials in 2022, from entry to mastery
Jun 15, 2017 pm 05:50 PM
Javascript is a very unique language. It is unique in terms of the organization of the code, the programming paradigm of the code, and the object-oriented theory. The issue of whether Javascript is an object-oriented language that has been debated for a long time has obviously been There is an answer. However, even though Javascript has been dominant for twenty years, if you want to understand popular frameworks such as jQuery, Angularjs, and even React, just watch the "Black Horse Cloud Classroom JavaScript Advanced Framework Design Video Tutorial".
Use PHP and AngularJS to build a responsive website to provide a high-quality user experience
Jun 27, 2023 pm 07:37 PM
In today's information age, websites have become an important tool for people to obtain information and communicate. A responsive website can adapt to various devices and provide users with a high-quality experience, which has become a hot spot in modern website development. This article will introduce how to use PHP and AngularJS to build a responsive website to provide a high-quality user experience. Introduction to PHP PHP is an open source server-side programming language ideal for web development. PHP has many advantages, such as easy to learn, cross-platform, rich tool library, development efficiency
Build web applications using PHP and AngularJS
May 27, 2023 pm 08:10 PM
With the continuous development of the Internet, Web applications have become an important part of enterprise information construction and a necessary means of modernization work. In order to make web applications easy to develop, maintain and expand, developers need to choose a technical framework and programming language that suits their development needs. PHP and AngularJS are two very popular web development technologies. They are server-side and client-side solutions respectively. Their combined use can greatly improve the development efficiency and user experience of web applications. Advantages of PHPPHP
Use PHP and AngularJS to develop an online file management platform to facilitate file management
Jun 27, 2023 pm 01:34 PM
With the popularity of the Internet, more and more people are using the network to transfer and share files. However, due to various reasons, using traditional methods such as FTP for file management cannot meet the needs of modern users. Therefore, establishing an easy-to-use, efficient, and secure online file management platform has become a trend. The online file management platform introduced in this article is based on PHP and AngularJS. It can easily perform file upload, download, edit, delete and other operations, and provides a series of powerful functions, such as file sharing, search,
How to use PHP and AngularJS for front-end development
May 11, 2023 pm 05:18 PM
With the popularity and development of the Internet, front-end development has become more and more important. As front-end developers, we need to understand and master various development tools and technologies. Among them, PHP and AngularJS are two very useful and popular tools. In this article, we will explain how to use these two tools for front-end development. 1. Introduction to PHP PHP is a popular open source server-side scripting language. It is suitable for web development and can run on web servers and various operating systems. The advantages of PHP are simplicity, speed and convenience
How to use AngularJS in PHP programming?
Jun 12, 2023 am 09:40 AM
With the popularity of web applications, the front-end framework AngularJS has become increasingly popular. AngularJS is a JavaScript framework developed by Google that helps you build web applications with dynamic web application capabilities. On the other hand, for backend programming, PHP is a very popular programming language. If you are using PHP for server-side programming, then using PHP with AngularJS will bring more dynamic effects to your website.
Build a single-page web application using Flask and AngularJS
Jun 17, 2023 am 08:49 AM
With the rapid development of Web technology, Single Page Web Application (SinglePage Application, SPA) has become an increasingly popular Web application model. Compared with traditional multi-page web applications, the biggest advantage of SPA is that the user experience is smoother, and the computing pressure on the server is also greatly reduced. In this article, we will introduce how to build a simple SPA using Flask and AngularJS. Flask is a lightweight Py
Introduction to the basics of AngularJS
Apr 21, 2018 am 10:37 AM
The content of this article is about the basic introduction to AngularJS. It has certain reference value. Now I share it with you. Friends in need can refer to it.
