124 lines
3.9 KiB
JavaScript
124 lines
3.9 KiB
JavaScript
const { attrsToQuery } = require('./utils')
|
|
const hotReloadAPIPath = JSON.stringify(require.resolve('vue-hot-reload-api'))
|
|
const nonWhitespaceRE = /\S+/
|
|
|
|
module.exports = function genStyleInjectionCode (
|
|
loaderContext,
|
|
styles,
|
|
id,
|
|
resourcePath,
|
|
stringifyRequest,
|
|
needsHotReload,
|
|
needsExplicitInjection
|
|
) {
|
|
let styleImportsCode = ``
|
|
let styleInjectionCode = ``
|
|
let cssModulesHotReloadCode = ``
|
|
|
|
let hasCSSModules = false
|
|
const cssModuleNames = new Map()
|
|
|
|
function genStyleRequest (style, i) {
|
|
const src = style.src || resourcePath
|
|
const attrsQuery = attrsToQuery(style.attrs, 'css')
|
|
const inheritQuery = `&${loaderContext.resourceQuery.slice(1)}`
|
|
// make sure to only pass id when necessary so that we don't inject
|
|
// duplicate tags when multiple components import the same css file
|
|
const idQuery = style.scoped ? `&id=${id}` : ``
|
|
const query = `?vue&type=style&index=${i}${idQuery}${attrsQuery}${inheritQuery}`
|
|
return stringifyRequest(src + query)
|
|
}
|
|
|
|
function genCSSModulesCode (style, request, i) {
|
|
hasCSSModules = true
|
|
|
|
const moduleName = style.module === true ? '$style' : style.module
|
|
if (cssModuleNames.has(moduleName)) {
|
|
loaderContext.emitError(`CSS module name ${moduleName} is not unique!`)
|
|
}
|
|
cssModuleNames.set(moduleName, true)
|
|
|
|
// `(vue-)style-loader` exports the name-to-hash map directly
|
|
// `css-loader` exports it in `.locals`
|
|
const locals = `(style${i}.locals || style${i})`
|
|
const name = JSON.stringify(moduleName)
|
|
|
|
if (!needsHotReload) {
|
|
styleInjectionCode += `this[${name}] = ${locals}\n`
|
|
} else {
|
|
styleInjectionCode += `
|
|
cssModules[${name}] = ${locals}
|
|
Object.defineProperty(this, ${name}, {
|
|
configurable: true,
|
|
get: function () {
|
|
return cssModules[${name}]
|
|
}
|
|
})
|
|
`
|
|
cssModulesHotReloadCode += `
|
|
module.hot && module.hot.accept([${request}], function () {
|
|
var oldLocals = cssModules[${name}]
|
|
if (oldLocals) {
|
|
var newLocals = require(${request})
|
|
if (JSON.stringify(newLocals) !== JSON.stringify(oldLocals)) {
|
|
cssModules[${name}] = newLocals
|
|
require(${hotReloadAPIPath}).rerender("${id}")
|
|
}
|
|
}
|
|
})
|
|
`
|
|
}
|
|
}
|
|
|
|
// empty styles: with no `src` specified or only contains whitespaces
|
|
const isNotEmptyStyle = style => style.src || nonWhitespaceRE.test(style.content)
|
|
// explicit injection is needed in SSR (for critical CSS collection)
|
|
// or in Shadow Mode (for injection into shadow root)
|
|
// In these modes, vue-style-loader exports objects with the __inject__
|
|
// method; otherwise we simply import the styles.
|
|
if (!needsExplicitInjection) {
|
|
styles.forEach((style, i) => {
|
|
// do not generate requests for empty styles
|
|
if (isNotEmptyStyle(style)) {
|
|
const request = genStyleRequest(style, i)
|
|
styleImportsCode += `import style${i} from ${request}\n`
|
|
if (style.module) genCSSModulesCode(style, request, i)
|
|
}
|
|
})
|
|
} else {
|
|
styles.forEach((style, i) => {
|
|
if (isNotEmptyStyle(style)) {
|
|
const request = genStyleRequest(style, i)
|
|
styleInjectionCode += (
|
|
`var style${i} = require(${request})\n` +
|
|
`if (style${i}.__inject__) style${i}.__inject__(context)\n`
|
|
)
|
|
if (style.module) genCSSModulesCode(style, request, i)
|
|
}
|
|
})
|
|
}
|
|
|
|
if (!needsExplicitInjection && !hasCSSModules) {
|
|
return styleImportsCode
|
|
}
|
|
|
|
return `
|
|
${styleImportsCode}
|
|
${hasCSSModules && needsHotReload ? `var cssModules = {}` : ``}
|
|
${needsHotReload ? `var disposed = false` : ``}
|
|
|
|
function injectStyles (context) {
|
|
${needsHotReload ? `if (disposed) return` : ``}
|
|
${styleInjectionCode}
|
|
}
|
|
|
|
${needsHotReload ? `
|
|
module.hot && module.hot.dispose(function (data) {
|
|
disposed = true
|
|
})
|
|
` : ``}
|
|
|
|
${cssModulesHotReloadCode}
|
|
`.trim()
|
|
}
|