How to resize image to fit on a small HTML5 canvas without loosing image quality?

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This is my code. I want to be able to draw image on the canvas without loosing the quality of the image.

const canvas = document.getElementById("canvas");
const context = canvas.getContext("2d");
canvas.width = 360px;
canvas.height = 360px;
const img = new Image();
img.src = "some-image.jpg" // image size is 3840*2594px

var scale = Math.min(
        canvas.width / img.width,
        canvas.height / img.height
      );
      // get the top left position of the image
      var x = canvas.width / 2 - (img.width / 2) * scale;
      var y = canvas.height / 2 - (img.height / 2) * scale;

context.drawImage(img, x, y, img.width * scale, img.height * scale);

103 thoughts on “How to resize image to fit on a small HTML5 canvas without loosing image quality?”

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