[SOLVED] Is it possible to dynamically change font to a custom typeface with javascript?

Is it possible to dynamically change font to a custom typeface with javascript?

I have been looking around, but seem not to find an answer to it!

I have been trying like so:

document.body.style.fontFamily = "src(url(./webfonts/Compagnon-Bold.woff)";

and so:

document.body.style.fontFamily = "Script";

But with no result. It is also in CSS already:

 @font-face {
  font-family: 'Script';
  src: url(./webfonts/Compagnon-Bold.woff);
  }

Solution

You can use the new FontFace API for this if you support modern browsers:

Here, in this demo the default font is Roboto and when we click on the button the font for the body is changed to Sriracha font.

document.querySelector("button").addEventListener("click", function() {
  var myfont = new FontFace('Sriracha', 'url(https://fonts.gstatic.com/s/sriracha/v4/0nkrC9D4IuYBgWcI9NbfTwE.woff2) format("woff2")');
  myfont.load().then(function(loadedFont) {
    document.fonts.add(loadedFont);
    document.body.style.fontFamily = 'Sriracha';
  }).catch(function(error) {
    // error occurred
  });
});

@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');
body {
  font-family: 'Roboto', sans-serif;
}

<button>Change Font</button>
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