Bootstrap 4 如何将bootstrap 4成功和错误类与Angular 5 ngClass一起使用
我在我的代码中有一些问题,我正在试图理解其原因以及它的来源。所以在这里,我在我的输入验证器中添加了is valid和is invalid类,我也尝试使用has success和has error类,但我猜它对bootstrap4不起作用。这是我的component.html`Bootstrap 4 如何将bootstrap 4成功和错误类与Angular 5 ngClass一起使用,bootstrap-4,angular5,angular-reactive-forms,Bootstrap 4,Angular5,Angular Reactive Forms,我在我的代码中有一些问题,我正在试图理解其原因以及它的来源。所以在这里,我在我的输入验证器中添加了is valid和is invalid类,我也尝试使用has success和has error类,但我猜它对bootstrap4不起作用。这是我的component.html` <h1 class="page-header">Register Page</h1> <!-- Registration Form --> <form [formGroup]='
<h1 class="page-header">Register Page</h1>
<!-- Registration Form -->
<form [formGroup]='form' (submit)='onRegisterSubmit()' >
<div class="form-group">
<label for="username">Username</label>
<div [ngClass]="{'is-invalid': (form.controls['username'].errors && form.controls['username'].dirty), 'is-valid': !form.controls['username'].errors}">
<input type="text" name="username" formControlName="username" class="form-control" autocomplete="off" placeholder="*Username">
<ul class="help-block">
<li *ngIf="form.controls['username'].errors?.required && form.controls['username'].dirty">This field is required</li>
<li *ngIf="form.controls['username'].errors?.minlength && form.controls['username'].dirty || form.controls['username'].errors?.maxlength && form.controls['username'].dirty ">Minimum characters: 3, Maximum characters: 15</li>
<li *ngIf="form.controls['username'].errors?.validateUsername && form.controls['username'].dirty">Username must not have any special characters</li>
</ul>
</div>
</div>
<div class="form-group">
<label for="email">E-mail</label>
<div [ngClass]="{'is-invalid': (form.controls['email'].errors && form.controls['email'].dirty), 'is-valid': !form.controls['email'].errors}">
<input type="text" name="email" class="form-control" formControlName="email" autocomplete="off" placeholder="*E-mail">
<ul class="help-block">
<li *ngIf="form.controls['email'].errors?.minlength && form.controls['email'].dirty || form.controls['email'].errors?.maxlength && form.controls['email'].dirty ">Minimum characters: 5, Maximum characters: 30</li>
<li *ngIf="form.controls['email'].errors?.required && form.controls['email'].dirty">This field is required</li>
<li *ngIf="form.controls['email'].errors?.validateEmail && form.controls['email'].dirty">This must be a valid email</li>
</ul>
</div>
</div>
<div class="form-group">
<label for="password">Password</label>
<div [ngClass]="{'is-invalid': (form.controls['password'].errors && form.controls['password'].dirty), 'is-valid': !form.controls['password'].errors}">
<input type="password" name="password" formControlName="password" class="form-control" autocomplete="off" placeholder="*Password">
<ul class="help-block">
<li *ngIf="form.controls['password'].errors?.required && form.controls['password'].dirty">This field is required</li>
<li *ngIf="form.controls['password'].errors?.minlength && form.controls['password'].dirty || form.controls['password'].errors?.maxlength && form.controls['password'].dirty ">Minimum characters: 8, Maximum characters: 35</li>
<li *ngIf="form.controls['password'].errors?.validatePassword && form.controls['password'].dirty">Must have at least one uppercase, lowercase, special character, and number</li>
</ul>
</div>
</div>
<div class="form-group">
<label for="confirm">Confirm Password</label>
<div [ngClass]="{'is-invalid': (form.controls['confirm'].errors && form.controls['confirm'].dirty) || (form.errors?.matchingPasswords && form.controls['confirm'].dirty), 'is-valid': !form.controls['confirm'].errors && !form.errors?.matchingPasswords}">
<input type="password" name="confirm" class="form-control" formControlName="confirm" autocomplete="off" placeholder="*Confirm Password">
<ul class="help-block">
<li *ngIf="form.controls['confirm'].errors?.required && form.controls['confirm'].dirty">This field is required</li>
<li *ngIf="form.errors?.matchingPasswords && form.controls['confirm'].dirty">Password do not match!</li>
</ul>
</div>
</div>
<input [disabled]="!form.valid" type="submit" class="btn btn-primary" value="Submit">
</form>
注册页面
用户名
- 此字段为必填字段
- 最小字符数:3个,最大字符数:15个
用户名不能有任何特殊字符
电子邮件
- 最小字符数:5个,最大字符数:30个
- 此字段为必填字段
这必须是一封有效的电子邮件
密码
- 此字段为必填字段
- 最小字符数:8个,最大字符数:35个
- 必须至少有一个大写、小写、特殊字符和数字
确认密码
- 此字段为必填字段
密码不匹配李>
这是我的组件`
import { Component, OnInit, group } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
@Component({
selector: 'app-register',
templateUrl: './register.component.html',
styleUrls: ['./register.component.css']
})
export class RegisterComponent implements OnInit {
form:FormGroup;
constructor(private formBuilder:FormBuilder) {
this.createForm();
}
createForm(){
this.form=this.formBuilder.group({
email:['',Validators.compose([
Validators.required,
Validators.minLength(5),
Validators.maxLength(30),
this.validateEmail
])],
username:['',Validators.compose([
Validators.required,
Validators.minLength(3),
Validators.maxLength(15),
this.validateUsername
])],
password:['',Validators.compose([
Validators.required,
Validators.minLength(8),
Validators.maxLength(35),
this.validatePassword
])],
confirm:['',Validators.required]
},{validator:this.matchingPasswords('password','confirm')});
}
validateEmail(controls){
const regExp = new RegExp(
/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
);
if(regExp.test(controls.value)){
return null;
}else{
return {'validateEmail':true};
}
}
validateUsername(controls){
const regExp = new RegExp(/^[a-zA-z0-9]+$/);
if(regExp.test(controls.value)){
return null;
}else{
return {'validateUsername':true};
}
}
validatePassword(controls){
const regExp = new RegExp(/^(?=.*?[a-z])(?=.*?[A-Z])(?=.*?[\d])(?=.*?[\W]).{8,35}$/);
if(regExp.test(controls.value)){
return null;
}else{
return {'validatePassword':true};
}
}
matchingPasswords(password,confirm){
return (group:FormGroup)=>{
if(group.controls[password].value === group.controls[confirm].value){
return null;
}else{
return {'matchingPasswords':true};
}
}
}
onRegisterSubmit(){
console.log("submitted");
}
ngOnInit() {
}
}
从'@angular/core'导入{Component,OnInit,group};
从“@angular/forms”导入{FormBuilder、FormGroup、Validators};
@组成部分({
选择器:“应用程序寄存器”,
templateUrl:“./register.component.html”,
样式URL:['./register.component.css']
})
导出类RegisterComponent实现OnInit{
表格:表格组;
构造函数(专用formBuilder:formBuilder){
这个.createForm();
}
createForm(){
this.form=this.formBuilder.group({
电子邮件:['',Validators.compose([
需要验证器,
验证器。最小长度(5),
验证器。最大长度(30),
这是一封电子邮件
])],
用户名:['',Validators.compose([
需要验证器,
验证器。最小长度(3),
验证程序。最大长度(15),
这个.validateUsername
])],
密码:['',Validators.compose([
需要验证器,
验证器。最小长度(8),
验证器。最大长度(35),
这是一个密码
])],
确认:['',验证器。必需]
},{validator:this.matchingPasswords('password','confirm')});
}
validateEmail(控件){
const regExp=新regExp(
/^([^()\[\]\\,;:\s@“]+(\.[^()\[\]\,;:\s@“]+)*)(“+”)(\[[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}]));([a-zA-Z-0-9]++.[a-zA-Z]{2,)$/
);
if(regExp.test(controls.value)){
返回null;
}否则{
返回{'validateEmail':true};
}
}
validateUsername(控件){
const regExp=新的regExp(/^[a-zA-z0-9]+$/);
if(regExp.test(controls.value)){
返回null;
}否则{
返回{'validateUsername':true};
}
}
validatePassword(控件){
常量regExp=newregexp(/^(?=.[a-z])(?=.[a-z])(?=..[\d])(?=.[\W]){8,35}$/;
if(regExp.test(controls.value)){
返回null;
}否则{
返回{'validatePassword':true};
}
}
匹配密码(密码,确认){
返回(组:FormGroup)=>{
if(group.controls[password].value==group.controls[confirm].value){
返回null;
}否则{
返回{'matchingPasswords':true};
}
}
}
onRegisterSubmit(){
控制台日志(“已提交”);
}
恩戈尼尼特(){
}
}
我需要的是,当用户在输入中键入某些内容时,它会将类更改为success或error。我该怎么做 我知道您的问题很久以前就提出了,但这是通过反应式表单技术和bootstrap 4显示验证来验证表单控件输入字段的最佳方法。首先,您需要为表单编写一些代码:在html部分:
<form [formGroup]="myForm">
<div class="form-group">
<label for="name">first Name: </label>
<input type="text" class="form-control" formControlName="firstName" id="name">
<div *ngIf="firstName.touched && firstName.invalid" class="alert alert-danger">
<div *ngIf="firstName.errors.required">filling name is required!</div>
</div>
</div>
</form>
现在您可以看到验证正在工作。现在,要为输入字段指定样式以显示无效输入周围的红色边框,只需转到组件的css文件并将此类添加到css文件:
/// invalid
.form-control.ng-touched.ng-invalid{border:2px solid red;}
///valid
.form-control.ng-touched.ng-invalid{border:2px solid green;}
使用这种技术不需要使用ng类
/// invalid
.form-control.ng-touched.ng-invalid{border:2px solid red;}
///valid
.form-control.ng-touched.ng-invalid{border:2px solid green;}