Override CSS prefers-color-scheme

setTheme.js

function setTheme(theme) {
    Array.from(document.styleSheets).map(e => {
        try {
            return Array.from(e.cssRules)
        } catch (e) {
            return []
        }
    }).flat().map(e => {
        if (e.constructor != CSSMediaRule) return;
        if (e.originalConditionText) e.conditionText = e.originalConditionText;
        else e.originalConditionText = e.conditionText
        if (theme == "system") return
        let match = e.conditionText.match(/prefers-color-scheme:\s*(light|dark)/i)
        if (!match) return;
        e.conditionText = e.conditionText.replace(match[0], (match[1].toLowerCase() == theme ? 'min' : 'max') + '-width: 0')
    })
}