@stormid/outliner/src/index.js

Hide CSS outline on mouse interactions, show on keyboard interactions

{
    const NO_OUTLINE_CLASSNAME = 'no-outline';
    document.addEventListener('mousedown', () => {
        document.documentElement.classList.add(NO_OUTLINE_CLASSNAME);
    });
    document.addEventListener('keydown', () => {
        document.documentElement.classList.remove(NO_OUTLINE_CLASSNAME);
    });
};