Friday, April 12, 2024

Preview Image In Angular 7 Before Upload

Preview Image In Angular 7 Before Upload

Hello to all, welcome to In this post, I will tell you, Preview Image In Angular 7 Before Upload.

Angular 7 is just released and it is growing day by day very fastly and famous as single page application. In this post, I am showing image preview before upload and this is very helpful for every Angular developer.

I am doing this without using any external library.

Here is the working image:

Preview Image In Angular 7 Before Upload


Here are the working steps you need to follow:


1. Here are the common basics command for installing Angular 7 application:

$ npm install -g @angular/cli

$ ng new angularpreviewimage // Set Angular7 Application on your pc

cd angularpreviewimage // Go inside project folder

ng serve // Run project

http://localhost:4200/  //Check working Local server


2. Now add below code into your app.component.html file:

<h3>Angular7 Image Preview before Upload:</h3><br/><br/>
<img [src]="url" height="200" *ngIf="url"> <br/><br/>
<input type='file' (change)="onSelectFile($event)">


3. Now add below code into your app.component.ts file:

import {Component} from '@angular/core';
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
export class AppComponent {
  public imagePath;
  url: string;
  onSelectFile(event) { // called each time file input changes
    if ( &&[0]) {
      var reader = new FileReader();
      this.imagePath =;
      reader.readAsDataURL([0]); // read file as data url
      reader.onload = (event) => { // called once readAsDataURL is completed
        this.url = reader.result; //add source to image

This is it, if you have any query related to this post, then please do comment below or ask question.

Thank you,






the authortherichpost
Hello to all. Welcome to Myself Ajay Malhotra and I am freelance full stack developer. I love coding. I know WordPress, Core php, Angularjs, Angular 14, Angular 15, Angular 16, Angular 17, Bootstrap 5, Nodejs, Laravel, Codeigniter, Shopify, Squarespace, jQuery, Google Map Api, Vuejs, Reactjs, Big commerce etc.

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