dom appendStylesheet.ts

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  export default function appendStylesheet(rules: string[]): HTMLStyleElement {
    const style = document.createElement('style');
 
    document.head.appendChild(style);
 
    Eif (style.sheet instanceof CSSStyleSheet) {
        const { sheet } = style;
 
        rules.forEach((rule, index) => {
            sheet.insertRule(rule, index);
        });
    }
 
    return style;
}