function addClass(el, className) { if (hasClass(el, className)) { return } let newClass = el.className.split(' ') newClass.push(className) el.className = newClass.join(' ') } function hasClass(el, className) { let reg = new RegExp('(^|\\s)' + className + '(\\s|$)') return reg.test(el.className) }
js给元素添加样式[addClass][hasClass]
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转载自www.cnblogs.com/ladybug7/p/12310644.html
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