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62 lines
1.4 KiB
62 lines
1.4 KiB
/* @flow */
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/**
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* Add class with compatibility for SVG since classList is not supported on
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* SVG elements in IE
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*/
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export function addClass(el, cls) {
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/* istanbul ignore if */
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if (!cls || !(cls = cls.trim())) {
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return;
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}
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/* istanbul ignore else */
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if (el.classList) {
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if (cls.indexOf(' ') > -1) {
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cls.split(/\s+/).forEach(c => el.classList.add(c));
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} else {
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el.classList.add(cls);
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}
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} else {
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const cur = ` ${el.getAttribute('class') || ''} `;
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if (cur.indexOf(' ' + cls + ' ') < 0) {
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el.setAttribute('class', (cur + cls).trim());
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}
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}
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}
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/**
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* Remove class with compatibility for SVG since classList is not supported on
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* SVG elements in IE
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*/
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export function removeClass(el, cls) {
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/* istanbul ignore if */
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if (!cls || !(cls = cls.trim())) {
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return;
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}
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/* istanbul ignore else */
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if (el.classList) {
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if (cls.indexOf(' ') > -1) {
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cls.split(/\s+/).forEach(c => el.classList.remove(c));
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} else {
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el.classList.remove(cls);
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}
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if (!el.classList.length) {
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el.removeAttribute('class');
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}
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} else {
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let cur = ` ${el.getAttribute('class') || ''} `;
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const tar = ' ' + cls + ' ';
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while (cur.indexOf(tar) >= 0) {
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cur = cur.replace(tar, ' ');
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}
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cur = cur.trim();
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if (cur) {
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el.setAttribute('class', cur);
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} else {
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el.removeAttribute('class');
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}
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}
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}
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