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ngx-capture

v0.14.0

Published

Screen capture library for Angular

Downloads

27,360

Readme

NGX-CAPTURE

npm version

Screen capture library for Angular. Define a zone and it will capture it and return a string containing a base64 PNG.

Or download the result file.

Stackblitz Example

Angular 8 > npm install [email protected]

Angular 9 > npm install [email protected]

Angular 10+ > npm install ngx-capture

💪 If you like this library, you can buy me a coffee here!

Example

Install

npm install ngx-capture
import { NgModule } from '@angular/core';
import { NgxCaptureModule } from 'ngx-capture';

@NgModule({
  ...
  imports: [
    ...
    NgxCaptureModule,
  ],
})
export class AppModule {}

Define the screen capture area with a variable (eg. #screen):

<div #screen>
  <h1>Hey!</h1>
  <p>some content</p>
</div>

The is 4 ways to use this library

For a full element capture, use the service:

Each time you call the service, it will capture the whole content of the HTML element marked #screen

import { NgxCaptureService } from 'ngx-capture';
...
@ViewChild('screen', { static: true }) screen: any;

...
this.captureService.getImage(this.screen.nativeElement, true)
.pipe(
  tap(img => {
    console.log(img);
  })
).subscribe();

For the entire BODY

This will capture the full page

this.captureService
  .getImage(document.body, true)
  .pipe(
    tap((img) => {
      console.log(img);
    })
  )
  .subscribe();

To access crop options, use the component

This will allow you to click and drag to select the area you want to capture.

ex: https://ngx-capture-example-component.stackblitz.io

import { Component } from '@angular/core';

@Component({
  selector: 'app',
  template: `
    ...
    <ngx-capture [target]="screen" (resultImage)="saveImage($event)"></ngx-capture>
  `,
})
export class AppComponent {
  saveImage(img: string) {
    console.log(img);
  }
}

Using crop options freely

This way, you can set a specific area to capture.

this.captureService
  .getImage(this.screen.nativeElement, false, {
    x: 50,
    y: 150,
    width: 50,
    height: 50,
  })
  .pipe(tap((img) => (this.img = img)))
  .subscribe();

Download the result directly

Once you have the image as a string, you can pass it to the downloadImage method to download it.

this.captureService
  .getImage(document.body, true)
  .pipe(
    tap((img) => {
      console.log(img);
    }),
    tap((img) => this.captureService.downloadImage(img))
  )
  .subscribe();