Two ways to pop up a modal box in Angular

This article mainly introduces the two ways of popping up the modal box in Angular. It is very good and has reference value. Friends who need it can refer to it. I hope it can help everyone.

Before starting our blog, we must first install ngx-bootstrap-modal

npm install ngx-bootstrap-modal --save

Otherwise, the effect of our modal box will be ugly and you will want to vomit

1. Pop-up method one (this method comes from https://github.com/cipchk/ngx-bootstrap-modal)

1.alert pop-up box

(1)demo directory

--------app.component.ts

--------app.component.html

--------app.module .ts

--------detail(folder)

------------detail.component.ts

------------detail.component.html

(2)demo code

app.module.ts import the necessary BootstrapModalModule and ModalModule, and then register them

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
//这种模态框只需要导入下面这两个
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
import { DetailComponent } from './detail/detail.component';
@NgModule({
 declarations: [
 AppComponent,
 DetailComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule
 ],
 providers: [],
 entryComponents: [
 DetailComponent
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

app.component.htmlCreate a button that can pop up a modal box

<p>
 </p><p>
 <button>alert模态框</button>
 </p> 

app.component.tsWrite the action showAlert() of this button

import { Component } from '@angular/core';
import { DialogService } from "ngx-bootstrap-modal";
import { DetailComponent } from './detail/detail.component'
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService) {
 } 
 showAlert() {
  this.dialogService.addDialog(DetailComponent, { title: 'Alert title!', message: 'Alert message!!!' });
 }
}

detail.component .html writes the layout of the alert pop-up box

<p>
 </p><p>
  </p><p>
   <button>×</button>
   </p><h4 id="title">{{title}}</h4>
  
  <p>
   这是alert弹框
  </p>
  <p>
   <button>取消</button>
   <button>确定</button>
  </p>
 

detail.component.ts to create the modal box component. We need to create a component, and then ngx-bootstrap-model will help guide the startup
This component needs to be inherited DialogComponent class, contains two parameters:

T The type of external parameter passed to the modal box.

T1 modal box return value type.

Therefore, DialogService should be a constructor parameter of DialogComponent.

import { Component } from '@angular/core';
import { DialogComponent, DialogService } from 'ngx-bootstrap-modal';
export interface AlertModel {
 title: string;
 message: string;
}
@Component({
 selector: 'alert',
 templateUrl: './detail.component.html',
 styleUrls: ['./detail.component.css']
})
export class DetailComponent extends DialogComponent<alertmodel> implements AlertModel {
 title: string;
 message: string;
 constructor(dialogService: DialogService) {
 super(dialogService);
 }
}</alertmodel>

2.confirm pop-up box

(1)demo directory

--------app.component.ts
----- ---app.component.html
--------app.module.ts
--------confirm(folder)
------- -----confirm.component.ts
------------confirm.component.html

(2)demo code

app.module .ts imports the necessary BootstrapModalModule and ModalModule, and then registers them. These are the same as the alert pop-up box, because these are the pop-up methods of method 1

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
//这种模态框只需要导入下面这两个
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
import { DetailComponent } from './detail/detail.component';
@NgModule({
 declarations: [
 AppComponent,
 DetailComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule
 ],
 providers: [],
 entryComponents: [
 DetailComponent
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

app.component.htmlCreate a modal box that can pop up Button

<p>
 </p><p>
 <button>modal模态框</button>
 </p> 

app.component.tsWrite the action of this button showConfirm()

import { Component } from '@angular/core';
import { DialogService } from "ngx-bootstrap-modal";
import { ConfirmComponent } from './confirm/confirm.component'
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService,private modalService: BsModalService) {
 }
 showConfirm() {
  this.dialogService.addDialog(ConfirmComponent, {
   title: 'Confirmation',
   message: 'bla bla'
  })
   .subscribe((isConfirmed) => {
   });
 }
}

confirm.component.htmlWrite the layout of the confirm pop-up box

<p>
 </p><p>
  </p><p>
   <button>×</button>
   </p><h4 id="title">{{title}}</h4>
  
  <p>
   这是confirm弹框
  </p>
  <p>
   <button>取消</button>
   <button>确定</button>
  </p>
 

confirm.component. ts creates modal box component

import { Component } from '@angular/core';
import { DialogComponent, DialogService } from 'ngx-bootstrap-modal';
export interface ConfirmModel {
 title:string;
 message:any;
}
@Component({
 selector: 'confirm',
 templateUrl: './confirm.component.html',
 styleUrls: ['./confirm.component.css']
})
export class ConfirmComponent extends DialogComponent<confirmmodel> implements ConfirmModel {
 title: string;
 message: any;
 constructor(dialogService: DialogService) {
 super(dialogService);
 }
 confirm() {
 // on click on confirm button we set dialog result as true,
 // ten we can get dialog result from caller code
 this.close(true);
 }
 cancel() {
 this.close(false);
 }
}</confirmmodel>

3. Built-in pop-up box

(1)demo directory

--------app.component.ts

--------app.component.html
--------app.module.ts

(2)demo code

The built-in pop-up box also includes three forms of alert confirm prompt, all with some built-in styles

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { BootstrapModalModule } from 'ngx-bootstrap-modal';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
@NgModule({
 declarations: [
 AppComponent
 ],
 imports: [
 BrowserModule,
 BootstrapModalModule,
 ModalModule.forRoot()
 ],
 providers: [],
 bootstrap: [AppComponent]
})
export class AppModule { }

app.component.html is very simple, just one button

<p>
 </p><p>
 <button>内置</button>
 </p> 

app.component.ts is very simple, you don’t even need to write the layout of the component, just pass in some parameters such as icon, size, etc.

import { Component } from '@angular/core';
import { DialogService, BuiltInOptions } from "ngx-bootstrap-modal";
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 constructor(public dialogService: DialogService) {
 }
 show(){
  this.dialogService.show(<builtinoptions>{
   content: '保存成功',
   icon: 'success',
   size: 'sm',
   showCancelButton: false
  })
 }
}</builtinoptions>

2. Pop-up method 2 (this method comes from https://valor-software.com/ngx-bootstrap/#/modals)

Still the same as the previous method, install ngx-bootstrap-modal first, and then import the bootstrap style sheet

1.demo directory

--------app.component.ts
--------app.component.html
------- -app.module.ts

2.demo code

app.module.ts imports the corresponding modules and registers them

//app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { ModalModule } from 'ngx-bootstrap/modal';
import { AppComponent } from './app.component';
@NgModule({
 declarations: [
 AppComponent
 ],
 imports: [
 BrowserModule,
 ModalModule.forRoot()
 ],
 providers: [],
 entryComponents: [
 ],
 bootstrap: [AppComponent]
})
export class AppModule { }

app.component.ts

import { Component,TemplateRef } from '@angular/core';
import { BsModalService } from 'ngx-bootstrap/modal';
import { BsModalRef } from 'ngx-bootstrap/modal/modal-options.class';
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
})
export class AppComponent {
 title = 'app';
 public modalRef: BsModalRef;
 constructor(private modalService: BsModalService) {
 }
 showSecond(template: TemplateRef<any>){//传入的是一个组件
  this.modalRef = this.modalService.show(template,{class: 'modal-lg'});//在这里通过BsModalService里面的show方法把它显示出来
 };
}</any>

app.component.html

<p>
 </p><p>
 <button>第二种弹出方式</button>
 </p> 

<!--第二种弹出方法的组件-->
<template>
 <p>
 </p>
<h4 id="第二种模态框">第二种模态框</h4>
 <button>
  <span>×</span>
 </button>
 
 <p>
 </p>
<p><span>第二种模态框弹出方式</span></p>
 
 <p>
  <button>确定</button>
  <button>取消</button>
 </p>
</template>

3. Final effect

We write all the bullet boxes above together, and then the effect is like this

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How to solve the problem that the BootStrap modal box is not vertically centered

bootstrap modal box nesting, tabindex attribute, How to remove shadow

Detailed explanation of bootstrap3-dialog-master modal box usage

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