@vue/component-compiler-utils 
Lower level utilities for compiling Vue single file components
This package contains lower level utilities that you can use if you are writing a plugin / transform for a bundler or module system that compiles Vue single file components into JavaScript. It is used in vue-loader version 15 and above.
The API surface is intentionally minimal - the goal is to reuse as much as possible while being as flexible as possible.
Why isn't vue-template-compiler a peerDependency?
Since this package is more often used as a low-level utility, it is usually a transitive dependency in an actual Vue project. It is therefore the responsibility of the higher-level package (e.g. vue-loader) to inject vue-template-compiler via options when calling the parse and compileTemplate methods.
Not listing it as a peer depedency also allows tooling authors to use a non-default template compiler instead of vue-template-compiler without having to include it just to fullfil the peer dep requirement.
API
parse(ParseOptions): SFCDescriptor
Parse raw single file component source into a descriptor with source maps. The actual compiler (vue-template-compiler) must be passed in via the compiler option so that the specific version used can be determined by the end user.
interface ParseOptions {
source: string
filename?: string
compiler: VueTemplateCompiler
// https://github.com/vuejs/vue/tree/dev/packages/vue-template-compiler#compilerparsecomponentfile-options
// default: { pad: 'line' }
compilerParseOptions?: VueTemplateCompilerParseOptions
sourceRoot?: string
needMap?: boolean
}
interface SFCDescriptor {
template: SFCBlock | null
script: SFCBlock | null
styles: SFCBlock[]
customBlocks: SFCCustomBlock[]
}
interface SFCCustomBlock {
type: string
content: string
attrs: { [key: string]: string | true }
start: number
end: number
map?: RawSourceMap
}
interface SFCBlock extends SFCCustomBlock {
lang?: string
src?: string
scoped?: boolean
module?: string | boolean
}compileTemplate(TemplateCompileOptions): TemplateCompileResults
Takes raw template source and compile it into JavaScript code. The actual compiler (vue-template-compiler) must be passed in via the compiler option so that the specific version used can be determined by the end user.
It can also optionally perform pre-processing for any templating engine supported by consolidate.
interface TemplateCompileOptions {
source: string
filename: string
compiler: VueTemplateCompiler
// https://github.com/vuejs/vue/tree/dev/packages/vue-template-compiler#compilercompiletemplate-options
// default: {}
compilerOptions?: VueTemplateCompilerOptions
// Template preprocessor
preprocessLang?: string
preprocessOptions?: any
// Transform asset urls found in the template into `require()` calls
// This is off by default. If set to true, the default value is
// {
// audio: 'src',
// video: ['src', 'poster'],
// source: 'src',
// img: 'src',
// image: ['xlink:href', 'href'],
// use: ['xlink:href', 'href']
// }
transformAssetUrls?: AssetURLOptions | boolean
// For vue-template-es2015-compiler, which is a fork of Buble
transpileOptions?: any
isProduction?: boolean // default: false
isFunctional?: boolean // default: false
optimizeSSR?: boolean // default: false
// Whether prettify compiled render function or not (development only)
// default: true
prettify?: boolean
}
interface TemplateCompileResult {
ast: Object | undefined
code: string
source: string
tips: string[]
errors: string[]
}
interface AssetURLOptions {
[name: string]: string | string[]
}Handling the Output
The resulting JavaScript code will look like this:
var render = function (h) { /* ... */}
var staticRenderFns = [function (h) { /* ... */}, function (h) { /* ... */}]It does NOT assume any module system. It is your responsibility to handle the exports, if needed.
compileStyle(StyleCompileOptions)
Take input raw CSS and applies scoped CSS transform. It does NOT handle pre-processors. If the component doesn't use scoped CSS then this step can be skipped.
interface StyleCompileOptions {
source: string
filename: string
id: string
map?: any
scoped?: boolean
trim?: boolean
preprocessLang?: string
preprocessOptions?: any
postcssOptions?: any
postcssPlugins?: any[]
}
interface StyleCompileResults {
code: string
map: any | void
rawResult: LazyResult | void // raw lazy result from PostCSS
errors: string[]
}compileStyleAsync(StyleCompileOptions)
Same as compileStyle(StyleCompileOptions) but it returns a Promise resolving to StyleCompileResults. It can be used with async postcss plugins.