Taku
54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
const { noop } = require('../lib/utils')
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const computedPropDef = {
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enumerable: true,
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configurable: true,
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get: noop,
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set: noop,
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}
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exports.defineComputed = function (target, key, userDef) {
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if (typeof userDef === 'function') {
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computedPropDef.get = userDef
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computedPropDef.set = noop
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} else {
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computedPropDef.get = userDef.get || noop
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computedPropDef.set = userDef.set || noop
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}
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Object.defineProperty(target, key, computedPropDef)
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}
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function cached (fn) {
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const cache = Object.create(null)
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return function cachedFn (str) {
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const hit = cache[str]
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return hit || (cache[str] = fn(str))
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}
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}
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const camelizeRE = /-(\w)/g
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const camelize = cached(function (str) {
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return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : '' })
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})
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const capitalize = cached(function (str) {
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return str.charAt(0).toUpperCase() + str.slice(1)
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})
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const hasOwnProperty = Object.prototype.hasOwnProperty
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function hasOwn (obj, key) {
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return hasOwnProperty.call(obj, key)
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}
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exports.resolveAsset = function (assets, id) {
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if (typeof id !== 'string') return
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if (hasOwn(assets, id)) return assets[id]
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const camelCaseId = camelize(id)
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if (hasOwn(assets, camelCaseId)) return assets[camelCaseId]
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const pascalCaseId = capitalize(camelCaseId)
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if (hasOwn(assets, pascalCaseId)) return assets[pascalCaseId]
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}
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