Black and white photo effect?

Question

JavaScript

Hello. Tell me please. I found an article on how to make a photo black and white, but there on Three.js. It’s like I don’t need interactive, can I somehow make the same filter on a regular Canvas, so as not to drag it into the Three.js project? Thank you.

Answer 1

img {
  -webkit-filter: grayscale(100%); /*для safari 6.0 - 9.0 */
  filter: grayscale(100%);
}

Answer 2

CSS: And the same filters can reduce brightness, contrast, etc.