57 lines
1.4 KiB
TypeScript
57 lines
1.4 KiB
TypeScript
function trim(string: string) {
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return (string || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '')
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}
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/* istanbul ignore next */
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export function hasClass(el: Element, cls: string) {
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if (!el || !cls) return false
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if (cls.indexOf(' ') !== -1) throw new Error('className should not contain space.')
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if (el.classList) {
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return el.classList.contains(cls)
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} else {
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return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1
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}
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}
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/* istanbul ignore next */
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export function addClass(el: Element, cls: string) {
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if (!el) return
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let curClass = el.className
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const classes = (cls || '').split(' ')
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for (let i = 0, j = classes.length; i < j; i++) {
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const clsName = classes[i]
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if (!clsName) continue
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if (el.classList) {
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el.classList.add(clsName)
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} else if (!hasClass(el, clsName)) {
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curClass += ' ' + clsName
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}
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}
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if (!el.classList) {
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el.className = curClass
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}
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}
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/* istanbul ignore next */
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export function removeClass(el: Element, cls: string) {
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if (!el || !cls) return
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const classes = cls.split(' ')
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let curClass = ' ' + el.className + ' '
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for (let i = 0, j = classes.length; i < j; i++) {
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const clsName = classes[i]
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if (!clsName) continue
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if (el.classList) {
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el.classList.remove(clsName)
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} else if (hasClass(el, clsName)) {
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curClass = curClass.replace(' ' + clsName + ' ', ' ')
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}
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}
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if (!el.classList) {
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el.className = trim(curClass)
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}
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}
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