How to force a canvas refresh in javascript?

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by daisha , in category: Javascript , 3 months ago

How to force a canvas refresh in javascript?

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1 answer

by tressie.damore , 3 months ago

@daisha 

You can force a canvas refresh in JavaScript by redrawing the content on the canvas. Here is an example code snippet:

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const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');

function refreshCanvas() {
  // Clear the canvas
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  
  // Redraw the content on the canvas
  // Add your drawing commands here
  
  // Request a new frame
  requestAnimationFrame(refreshCanvas);
}

// Call the refreshCanvas function to start the refreshing process
refreshCanvas();


In this code snippet, the refreshCanvas function first clears the canvas using the clearRect method. Then, you can redraw the content on the canvas within this function as needed. The function then requests a new frame using requestAnimationFrame to continually refresh the canvas. By calling the refreshCanvas function, you can start the process of refreshing the canvas.