How to include an external CSS file in a script?

Question

css

The situation is as follows:
There is a script on the page, according to the model:

<script>
  ********** = function () {
  *********** = "";
};
</script>

In quotation marks, text \ tags are set to visually change the text. Is it possible to include an external CSS file here? If so, how?
If not, how can I write my own font here?

Answer 1

In JavaScript, create a variable with the string
A and then add this string using document to the page itself

let font = "<link href='стиль.css' rel='stylesheet'>";
document.append(font);

The fact is that you cannot directly connect the font separately, it is possible only if the font inside the CSS is specified.