Angular is used to call a function that captures a specific div and then waits for the capture to be completed before

Question

Angular is used to call a function that captures a specific div and then waits for the capture to be completed before

I'm facing a challenge where I need to handle the capturing of a div using a method called capture() within another method. Take a look at the code snippet below:

theimage; // declaring the variable


callcapture() {

  // perform certain actions

  this.capture(); // Invoking the capture method here 

  // More actions follow, but they should not execute until "this.capture() has finished"

}


capture() {
  const element = document.getElementById("capture") as HTMLCanvasElement;
  html2canvas(element).then((canvas) => {
    this.theimage = canvas.toDataURL();
  });
}

Any suggestions on how I can achieve this?

javascript angular typescript

Answer 1

Answer №1

Have you thought about utilizing Angular's @ViewChild for this task? It's often not recommended to rely on native JS methods such as getElementById, getElementsByClassName, etc. within an Angular project.

    <canvas #myCanvas></canvas>

    @ViewChild('myCanvas', {static: false}) canvasElem: ElementRef;

You can then interact with it like so:

const context = this.canvasElem.nativeElement.getContext("2d");
const base64:string = this.canvasElem.nativeElement.toDataURL();

Answer 2

Have you thought about utilizing Angular's @ViewChild for this task? It's often not recommended to rely on native JS methods such as getElementById, getElementsByClassName, etc. within an Angular project.

    <canvas #myCanvas></canvas>

    @ViewChild('myCanvas', {static: false}) canvasElem: ElementRef;

You can then interact with it like so:

const context = this.canvasElem.nativeElement.getContext("2d");
const base64:string = this.canvasElem.nativeElement.toDataURL();

Answer 3

Answer №2

To ensure that the element has been successfully captured, you can return the promise and utilize another then statement:

executeCapture() {
  // perform necessary actions
  this.capture().then(() => {
    // Carry out additional tasks ONLY after "this.capture() has completed"
  });
}

capture() {
  const targetElement = document.getElementById("capture") as HTMLCanvasElement;
  return html2canvas(targetElement).then((canvas) => {
    this.snapshot = canvas.toDataURL();
  });
}

Answer 4

To ensure that the element has been successfully captured, you can return the promise and utilize another then statement:

executeCapture() {
  // perform necessary actions
  this.capture().then(() => {
    // Carry out additional tasks ONLY after "this.capture() has completed"
  });
}

capture() {
  const targetElement = document.getElementById("capture") as HTMLCanvasElement;
  return html2canvas(targetElement).then((canvas) => {
    this.snapshot = canvas.toDataURL();
  });
}

Angular is used to call a function that captures a specific div and then waits for the capture to be completed before

Answer №1

Answer №2

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