style: _callouts.scss simplification (#169)

Jacky Zhao

2022-08-04 ff770927fdbb13e07572b3993686686da4493cc9

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const addCollapsibleCallouts = () => {
    const collapsibleCallouts = document.querySelectorAll("blockquote.callout-collapsible");
    collapsibleCallouts.forEach(el => el.addEventListener('click', event => {
        event.currentTarget.classList.toggle("callout-collapsed");
    }));
}