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19 lines
457 B
JavaScript
19 lines
457 B
JavaScript
function updateClass(oldVnode, vnode) {
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var cur, name, elm = vnode.elm,
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oldClass = oldVnode.data.class || {},
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klass = vnode.data.class || {};
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for (name in oldClass) {
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if (!klass[name]) {
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elm.classList.remove(name);
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}
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}
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for (name in klass) {
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cur = klass[name];
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if (cur !== oldClass[name]) {
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elm.classList[cur ? 'add' : 'remove'](name);
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}
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}
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}
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module.exports = {create: updateClass, update: updateClass};
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