/**
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* @license
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* Copyright 2018 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const assert = require('assert')
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const path = require('path')
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const { URL } = require('url')
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function determineAsValue ({ optionsAs, href, file }) {
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assert(href, `The 'href' parameter was not provided.`)
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switch (typeof optionsAs) {
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case 'string': {
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return optionsAs
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}
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case 'function': {
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return optionsAs(href)
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}
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case 'undefined': {
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// If `as` value is not provided in option, dynamically determine the correct
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// value based on the suffix of filename.
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// We only care about the pathname, so just use any domain when constructing the URL.
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// Use file instead of href option because the publicPath part may be malformed.
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// See https://github.com/vuejs/vue-cli/issues/5672
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const url = new URL(file || href, 'https://example.com')
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const extension = path.extname(url.pathname)
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if (extension === '.css') {
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return 'style'
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}
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if (extension === '.woff2') {
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return 'font'
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}
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return 'script'
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}
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default:
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throw new Error(`The 'as' option isn't set to a recognized value: ${optionsAs}`)
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}
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}
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module.exports = determineAsValue
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