ng g c component/steps

import { Component, OnInit} from '@angular/core';@Component({ selector: 'app-steps', templateUrl: './steps.component.html', styleUrls: ['./steps.component.css']})export class StepsComponent implements OnInit { constructor() { } ngOnInit() { }}

<div class="steps"> <ul class="lineUl">  <li *ngFor="let item of stepsData; let i=index" [ngClass]="{'liWidth': i+1 == stepsData.length}">   <div class="stepsIcon">    <div class="radioSelect radioSelectDisabled" [ngClass]="{'radioSelectDisabled': i+1>active}"></div>    <div *ngIf="i+1 != stepsData.length" class="line" [ngClass]="{'lineDefaule': i+2>active}">     <span *ngIf="!!item.tips">{{item.tips}}</span>    </div>   </div>  </li> </ul> <ul class="text">  <li *ngFor="let item of stepsData; let i=index">    <div class="title" *ngIf="!!item.title">{{item.title}}</div>    <div class="description" *ngIf="!!item.description">{{item.description}}</div>  </li> </ul></div>

import { Component, OnInit, Input } from '@angular/core';//引入Input@Component({ selector: 'app-steps', templateUrl: './steps.component.html', styleUrls: ['./steps.component.css']})export class StepsComponent implements OnInit { @Input() stepsData:any; @Input() active:string; constructor() { } ngOnInit() {  console.log(!!!this.active)  if(!!!this.active){   this.active="1";  } }}

.steps ul{  display: flex;}li{  width: 100%;  text-align: center;}.lineUl{  padding: 0px 10%;  margin-bottom: 5px;}.liWidth{  width: 20px;}.stepsIcon{  display: flex;}.radioSelect { box-sizing: border-box; display: inline-block; border-radius: 100%; border: 1px solid #26a2ff; position: relative; width: 20px; height: 20px; vertical-align: middle; background-color: #26a2ff;}.radioSelect::after { border: 2px solid transparent; border-left: 0; border-top: 0; content: ' '; top: 3px; left: 6px; position: absolute; width: 4px; height: 8px; border-color: #fff; -webkit-transform: rotate(45deg) scale(1); transform: rotate(45deg) scale(1); -webkit-transition: -webkit-transform 0.2s; transition: -webkit-transform 0.2s; transition: transform 0.2s; transition: transform 0.2s, -webkit-transform 0.2s;}.radioSelectDisabled {  background-color: #d9d9d9;  border-color: #ccc;}.line{  display: block;  flex: 1;  height: 16px;  border-bottom: 1px solid#26a2ff;  margin-top: -5px;  font-size: 12px;  color: #26a2ff;}.lineDefaule{  border-bottom: 1px solid#d9d9d9;}.title{  font-size: 14px;}.description{  font-size: 12px;}

<app-steps [stepsData]="stepsData" [active]='3'></app-steps>

 public stepsData:any = [  {   title:'步驟1',   description:'描述文件'  },  {   title:'步驟2',   description:'描述文件'  },  {   title:'步驟3',   description:'描述文件',   tips:'待開獎'  },  {   title:'步驟4',   description:'描述文件'  } ];//stepsData:步驟條參數//active：設置當前激活步驟，默認為1