51 lines
1.3 KiB
JavaScript
51 lines
1.3 KiB
JavaScript
var nestRE = /^(attrs|props|on|nativeOn|class|style|hook)$/
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module.exports = function mergeJSXProps (objs) {
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return objs.reduce(function (a, b) {
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var aa, bb, key, nestedKey, temp
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for (key in b) {
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aa = a[key]
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bb = b[key]
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if (aa && nestRE.test(key)) {
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// normalize class
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if (key === 'class') {
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if (typeof aa === 'string') {
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temp = aa
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a[key] = aa = {}
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aa[temp] = true
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}
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if (typeof bb === 'string') {
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temp = bb
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b[key] = bb = {}
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bb[temp] = true
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}
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}
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if (key === 'on' || key === 'nativeOn' || key === 'hook') {
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// merge functions
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for (nestedKey in bb) {
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aa[nestedKey] = mergeFn(aa[nestedKey], bb[nestedKey])
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}
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} else if (Array.isArray(aa)) {
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a[key] = aa.concat(bb)
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} else if (Array.isArray(bb)) {
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a[key] = [aa].concat(bb)
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} else {
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for (nestedKey in bb) {
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aa[nestedKey] = bb[nestedKey]
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}
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}
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} else {
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a[key] = b[key]
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}
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}
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return a
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}, {})
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}
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function mergeFn (a, b) {
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return function () {
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a && a.apply(this, arguments)
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b && b.apply(this, arguments)
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}
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}
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