@codegouvfr/react-dsfr/tools/getBaseFontSizePx.js

French State Design System React integration library

import { assert } from "tsafe/assert";
import { isBrowser } from "./isBrowser";
export function getBaseFontSizePx() {
    if (!isBrowser) {
        return 16;
    }
    const htmlElement = document.querySelector("html");
    assert(htmlElement !== null);
    const computedStyle = window.getComputedStyle(htmlElement);
    const fontSize = computedStyle.getPropertyValue("font-size");
    const fontSizeInPixels = parseFloat(fontSize);
    return fontSizeInPixels;
}
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