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