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{
BindingTypes,
UNREF,
isFunctionType,
unwrapTSNode,
walkIdentifiers,
} from '@vue/compiler-dom'
import {
DEFAULT_FILENAME,
type SFCDescriptor,
type SFCScriptBlock,
} from './parse'
import type { ParserPlugin } from '@babel/parser'
import { generateCodeFrame } from '@vue/shared'
import type {
ArrayPattern,
CallExpression,
Declaration,
ExportSpecifier,
Identifier,
Node,
ObjectPattern,
Statement,
} from '@babel/types'
import { walk } from 'estree-walker'
import type { RawSourceMap } from 'source-map-js'
import {
normalScriptDefaultVar,
processNormalScript,
} from './script/normalScript'
import { CSS_VARS_HELPER, genCssVarsCode } from './style/cssVars'
import {
type SFCTemplateCompileOptions,
compileTemplate,
} from './compileTemplate'
import { warnOnce } from './warn'
import { transformDestructuredProps } from './script/definePropsDestructure'
import { ScriptCompileContext } from './script/context'
import {
DEFINE_PROPS,
WITH_DEFAULTS,
genRuntimeProps,
processDefineProps,
} from './script/defineProps'
import {
DEFINE_EMITS,
genRuntimeEmits,
processDefineEmits,
} from './script/defineEmits'
import { DEFINE_EXPOSE, processDefineExpose } from './script/defineExpose'
import { DEFINE_OPTIONS, processDefineOptions } from './script/defineOptions'
import { DEFINE_SLOTS, processDefineSlots } from './script/defineSlots'
import { DEFINE_MODEL, processDefineModel } from './script/defineModel'
import { getImportedName, isCallOf, isLiteralNode } from './script/utils'
import { analyzeScriptBindings } from './script/analyzeScriptBindings'
import { isImportUsed } from './script/importUsageCheck'
import { processAwait } from './script/topLevelAwait'
export interface SFCScriptCompileOptions {
/**
* Scope ID for prefixing injected CSS variables.
* This must be consistent with the `id` passed to `compileStyle`.
*/
id: string
/**
* Production mode. Used to determine whether to generate hashed CSS variables
*/
isProd?: boolean
/**
* Enable/disable source map. Defaults to true.
*/
sourceMap?: boolean
/**
* https://babeljs.io/docs/en/babel-parser#plugins
*/
babelParserPlugins?: ParserPlugin[]
/**
* A list of files to parse for global types to be made available for type
* resolving in SFC macros. The list must be fully resolved file system paths.
*/
globalTypeFiles?: string[]
/**
* Compile the template and inline the resulting render function
* directly inside setup().
* - Only affects `<script setup>`
* - This should only be used in production because it prevents the template
* from being hot-reloaded separately from component state.
*/
inlineTemplate?: boolean
/**
* Generate the final component as a variable instead of default export.
* This is useful in e.g. @vitejs/plugin-vue where the script needs to be
* placed inside the main module.
*/
genDefaultAs?: string
/**
* Options for template compilation when inlining. Note these are options that
* would normally be passed to `compiler-sfc`'s own `compileTemplate()`, not
* options passed to `compiler-dom`.
*/
templateOptions?: Partial<SFCTemplateCompileOptions>
/**
* Hoist <script setup> static constants.
* - Only enables when one `<script setup>` exists.
* @default true
*/
hoistStatic?: boolean
/**
* Set to `false` to disable reactive destructure for `defineProps` (pre-3.5
* behavior), or set to `'error'` to throw hard error on props destructures.
* @default true
*/
propsDestructure?: boolean | 'error'
/**
* File system access methods to be used when resolving types
* imported in SFC macros. Defaults to ts.sys in Node.js, can be overwritten
* to use a virtual file system for use in browsers (e.g. in REPLs)
*/
fs?: {
fileExists(file: string): boolean
readFile(file: string): string | undefined
realpath?(file: string): string
}
/**
* Transform Vue SFCs into custom elements.
*/
customElement?: boolean | ((filename: string) => boolean)
}
export interface ImportBinding {
isType: boolean
imported: string
local: string
source: string
isFromSetup: boolean
isUsedInTemplate: boolean
}
const MACROS = [
DEFINE_PROPS,
DEFINE_EMITS,
DEFINE_EXPOSE,
DEFINE_OPTIONS,
DEFINE_SLOTS,
DEFINE_MODEL,
WITH_DEFAULTS,
]
/**
* Compile `<script setup>`
* It requires the whole SFC descriptor because we need to handle and merge
* normal `<script>` + `<script setup>` if both are present.
*/
export function compileScript(
sfc: SFCDescriptor,
options: SFCScriptCompileOptions,
): SFCScriptBlock {
if (!options.id) {
warnOnce(
`compileScript now requires passing the \`id\` option.\n` +
`Upgrade your vite or vue-loader version for compatibility with ` +
`the latest experimental proposals.`,
)
}
const ctx = new ScriptCompileContext(sfc, options)
const { script, scriptSetup, source, filename } = sfc
const hoistStatic = options.hoistStatic !== false && !script
const scopeId = options.id ? options.id.replace(/^data-v-/, '') : ''
const scriptLang = script && script.lang
const scriptSetupLang = scriptSetup && scriptSetup.lang
let refBindings: string[] | undefined
if (!scriptSetup) {
if (!script) {
throw new Error(`[@vue/compiler-sfc] SFC contains no <script> tags.`)
}
// normal <script> only
return processNormalScript(ctx, scopeId)
}
if (script && scriptLang !== scriptSetupLang) {
throw new Error(
`[@vue/compiler-sfc] <script> and <script setup> must have the same ` +
`language type.`,
)
}
if (scriptSetupLang && !ctx.isJS && !ctx.isTS) {
// do not process non js/ts script blocks
return scriptSetup
}
// metadata that needs to be returned
// const ctx.bindingMetadata: BindingMetadata = {}
const scriptBindings: Record<string, BindingTypes> = Object.create(null)
const setupBindings: Record<string, BindingTypes> = Object.create(null)
let defaultExport: Node | undefined
let hasAwait = false
let hasInlinedSsrRenderFn = false
// string offsets
const startOffset = ctx.startOffset!
const endOffset = ctx.endOffset!
const scriptStartOffset = script && script.loc.start.offset
const scriptEndOffset = script && script.loc.end.offset
function hoistNode(node: Statement) {
const start = node.start! + startOffset
let end = node.end! + startOffset
// locate comment
if (node.trailingComments && node.trailingComments.length > 0) {
const lastCommentNode =
node.trailingComments[node.trailingComments.length - 1]
end = lastCommentNode.end! + startOffset
}
// locate the end of whitespace between this statement and the next
while (end <= source.length) {
if (!/\s/.test(source.charAt(end))) {
break
}
end++
}
ctx.s.move(start, end, 0)
}
function registerUserImport(
source: string,
local: string,
imported: string,
isType: boolean,
isFromSetup: boolean,
needTemplateUsageCheck: boolean,
) {
// template usage check is only needed in non-inline mode, so we can skip
// the work if inlineTemplate is true.
let isUsedInTemplate = needTemplateUsageCheck
if (
needTemplateUsageCheck &&
ctx.isTS &&
sfc.template &&
!sfc.template.src &&
!sfc.template.lang
) {
isUsedInTemplate = isImportUsed(local, sfc)
}
ctx.userImports[local] = {
isType,
imported,
local,
source,
isFromSetup,
isUsedInTemplate,
}
}
function checkInvalidScopeReference(node: Node | undefined, method: string) {
if (!node) return
walkIdentifiers(node, id => {
const binding = setupBindings[id.name]
if (binding && binding !== BindingTypes.LITERAL_CONST) {
ctx.error(
`\`${method}()\` in <script setup> cannot reference locally ` +
`declared variables because it will be hoisted outside of the ` +
`setup() function. If your component options require initialization ` +
`in the module scope, use a separate normal <script> to export ` +
`the options instead.`,
id,
)
}
})
}
const scriptAst = ctx.scriptAst
const scriptSetupAst = ctx.scriptSetupAst!
// 1.1 walk import declarations of <script>
if (scriptAst) {
for (const node of scriptAst.body) {
if (node.type === 'ImportDeclaration') {
// record imports for dedupe
for (const specifier of node.specifiers) {
const imported = getImportedName(specifier)
registerUserImport(
node.source.value,
specifier.local.name,
imported,
node.importKind === 'type' ||
(specifier.type === 'ImportSpecifier' &&
specifier.importKind === 'type'),
false,
!options.inlineTemplate,
)
}
}
}
}
// 1.2 walk import declarations of <script setup>
for (const node of scriptSetupAst.body) {
if (node.type === 'ImportDeclaration') {
// import declarations are moved to top
hoistNode(node)
// dedupe imports
let removed = 0
const removeSpecifier = (i: number) => {
const removeLeft = i > removed
removed++
const current = node.specifiers[i]
const next = node.specifiers[i + 1]
ctx.s.remove(
removeLeft
? node.specifiers[i - 1].end! + startOffset
: current.start! + startOffset,
next && !removeLeft
? next.start! + startOffset
: current.end! + startOffset,
)
}
for (let i = 0; i < node.specifiers.length; i++) {
const specifier = node.specifiers[i]
const local = specifier.local.name
const imported = getImportedName(specifier)
const source = node.source.value
const existing = ctx.userImports[local]
if (source === 'vue' && MACROS.includes(imported)) {
if (local === imported) {
warnOnce(
`\`${imported}\` is a compiler macro and no longer needs to be imported.`,
)
} else {
ctx.error(
`\`${imported}\` is a compiler macro and cannot be aliased to ` +
`a different name.`,
specifier,
)
}
removeSpecifier(i)
} else if (existing) {
if (existing.source === source && existing.imported === imported) {
// already imported in <script setup>, dedupe
removeSpecifier(i)
} else {
ctx.error(
`different imports aliased to same local name.`,
specifier,
)
}
} else {
registerUserImport(
source,
local,
imported,
node.importKind === 'type' ||
(specifier.type === 'ImportSpecifier' &&
specifier.importKind === 'type'),
true,
!options.inlineTemplate,
)
}
}
if (node.specifiers.length && removed === node.specifiers.length) {
ctx.s.remove(node.start! + startOffset, node.end! + startOffset)
}
}
}
// 1.3 resolve possible user import alias of `ref` and `reactive`
const vueImportAliases: Record<string, string> = {}
for (const key in ctx.userImports) {
const { source, imported, local } = ctx.userImports[key]
if (source === 'vue') vueImportAliases[imported] = local
}
// 2.1 process normal <script> body
if (script && scriptAst) {
for (const node of scriptAst.body) {
if (node.type === 'ExportDefaultDeclaration') {
// export default
defaultExport = node
// check if user has manually specified `name` or 'render` option in
// export default
// if has name, skip name inference
// if has render and no template, generate return object instead of
// empty render function (#4980)
let optionProperties
if (defaultExport.declaration.type === 'ObjectExpression') {
optionProperties = defaultExport.declaration.properties
} else if (
defaultExport.declaration.type === 'CallExpression' &&
defaultExport.declaration.arguments[0] &&
defaultExport.declaration.arguments[0].type === 'ObjectExpression'
) {
optionProperties = defaultExport.declaration.arguments[0].properties
}
if (optionProperties) {
for (const p of optionProperties) {
if (
p.type === 'ObjectProperty' &&
p.key.type === 'Identifier' &&
p.key.name === 'name'
) {
ctx.hasDefaultExportName = true
}
if (
(p.type === 'ObjectMethod' || p.type === 'ObjectProperty') &&
p.key.type === 'Identifier' &&
p.key.name === 'render'
) {
// TODO warn when we provide a better way to do it?
ctx.hasDefaultExportRender = true
}
}
}
// export default { ... } --> const __default__ = { ... }
const start = node.start! + scriptStartOffset!
const end = node.declaration.start! + scriptStartOffset!
ctx.s.overwrite(start, end, `const ${normalScriptDefaultVar} = `)
} else if (node.type === 'ExportNamedDeclaration') {
const defaultSpecifier = node.specifiers.find(
s =>
s.exported.type === 'Identifier' && s.exported.name === 'default',
) as ExportSpecifier
if (defaultSpecifier) {
defaultExport = node
// 1. remove specifier
if (node.specifiers.length > 1) {
ctx.s.remove(
defaultSpecifier.start! + scriptStartOffset!,
defaultSpecifier.end! + scriptStartOffset!,
)
} else {
ctx.s.remove(
node.start! + scriptStartOffset!,
node.end! + scriptStartOffset!,
)
}
if (node.source) {
// export { x as default } from './x'
// rewrite to `import { x as __default__ } from './x'` and
// add to top
ctx.s.prepend(
`import { ${defaultSpecifier.local.name} as ${normalScriptDefaultVar} } from '${node.source.value}'\n`,
)
} else {
// export { x as default }
// rewrite to `const __default__ = x` and move to end
ctx.s.appendLeft(
scriptEndOffset!,
`\nconst ${normalScriptDefaultVar} = ${defaultSpecifier.local.name}\n`,
)
}
}
if (node.declaration) {
walkDeclaration(
'script',
node.declaration,
scriptBindings,
vueImportAliases,
hoistStatic,
)
}
} else if (
(node.type === 'VariableDeclaration' ||
node.type === 'FunctionDeclaration' ||
node.type === 'ClassDeclaration' ||
node.type === 'TSEnumDeclaration') &&
!node.declare
) {
walkDeclaration(
'script',
node,
scriptBindings,
vueImportAliases,
hoistStatic,
)
}
}
// <script> after <script setup>
// we need to move the block up so that `const __default__` is
// declared before being used in the actual component definition
if (scriptStartOffset! > startOffset) {
// if content doesn't end with newline, add one
if (!/\n$/.test(script.content.trim())) {
ctx.s.appendLeft(scriptEndOffset!, `\n`)
}
ctx.s.move(scriptStartOffset!, scriptEndOffset!, 0)
}
}
// 2.2 process <script setup> body
for (const node of scriptSetupAst.body) {
if (node.type === 'ExpressionStatement') {
const expr = unwrapTSNode(node.expression)
// process `defineProps` and `defineEmit(s)` calls
if (
processDefineProps(ctx, expr) ||
processDefineEmits(ctx, expr) ||
processDefineOptions(ctx, expr) ||
processDefineSlots(ctx, expr)
) {
ctx.s.remove(node.start! + startOffset, node.end! + startOffset)
} else if (processDefineExpose(ctx, expr)) {
// defineExpose({}) -> expose({})
const callee = (expr as CallExpression).callee
ctx.s.overwrite(
callee.start! + startOffset,
callee.end! + startOffset,
'__expose',
)
} else {
processDefineModel(ctx, expr)
}
}
if (node.type === 'VariableDeclaration' && !node.declare) {
const total = node.declarations.length
let left = total
let lastNonRemoved: number | undefined
for (let i = 0; i < total; i++) {
const decl = node.declarations[i]
const init = decl.init && unwrapTSNode(decl.init)
if (init) {
if (processDefineOptions(ctx, init)) {
ctx.error(
`${DEFINE_OPTIONS}() has no returning value, it cannot be assigned.`,
node,
)
}
// defineProps
const isDefineProps = processDefineProps(ctx, init, decl.id)
if (ctx.propsDestructureRestId) {
setupBindings[ctx.propsDestructureRestId] =
BindingTypes.SETUP_REACTIVE_CONST
}
// defineEmits
const isDefineEmits =
!isDefineProps && processDefineEmits(ctx, init, decl.id)
!isDefineEmits &&
(processDefineSlots(ctx, init, decl.id) ||
processDefineModel(ctx, init, decl.id))
if (
isDefineProps &&
!ctx.propsDestructureRestId &&
ctx.propsDestructureDecl
) {
if (left === 1) {
ctx.s.remove(node.start! + startOffset, node.end! + startOffset)
} else {
let start = decl.start! + startOffset
let end = decl.end! + startOffset
if (i === total - 1) {
// last one, locate the end of the last one that is not removed
// if we arrive at this branch, there must have been a
// non-removed decl before us, so lastNonRemoved is non-null.
start = node.declarations[lastNonRemoved!].end! + startOffset
} else {
// not the last one, locate the start of the next
end = node.declarations[i + 1].start! + startOffset
}
ctx.s.remove(start, end)
left--
}
} else if (isDefineEmits) {
ctx.s.overwrite(
startOffset + init.start!,
startOffset + init.end!,
'__emit',
)
} else {
lastNonRemoved = i
}
}
}
}
let isAllLiteral = false
// walk declarations to record declared bindings
if (
(node.type === 'VariableDeclaration' ||
node.type === 'FunctionDeclaration' ||
node.type === 'ClassDeclaration' ||
node.type === 'TSEnumDeclaration') &&
!node.declare
) {
isAllLiteral = walkDeclaration(
'scriptSetup',
node,
setupBindings,
vueImportAliases,
hoistStatic,
!!ctx.propsDestructureDecl,
)
}
// hoist literal constants
if (hoistStatic && isAllLiteral) {
hoistNode(node)
}
// walk statements & named exports / variable declarations for top level
// await
if (
(node.type === 'VariableDeclaration' && !node.declare) ||
node.type.endsWith('Statement')
) {
const scope: Statement[][] = [scriptSetupAst.body]
walk(node, {
enter(child: Node, parent: Node | null) {
if (isFunctionType(child)) {
this.skip()
}
if (child.type === 'BlockStatement') {
scope.push(child.body)
}
if (child.type === 'AwaitExpression') {
hasAwait = true
// if the await expression is an expression statement and
// - is in the root scope
// - or is not the first statement in a nested block scope
// then it needs a semicolon before the generated code.
const currentScope = scope[scope.length - 1]
const needsSemi = currentScope.some((n, i) => {
return (
(scope.length === 1 || i > 0) &&
n.type === 'ExpressionStatement' &&
n.start === child.start
)
})
processAwait(
ctx,
child,
needsSemi,
parent!.type === 'ExpressionStatement',
)
}
},
exit(node: Node) {
if (node.type === 'BlockStatement') scope.pop()
},
})
}
if (
(node.type === 'ExportNamedDeclaration' && node.exportKind !== 'type') ||
node.type === 'ExportAllDeclaration' ||
node.type === 'ExportDefaultDeclaration'
) {
ctx.error(
`<script setup> cannot contain ES module exports. ` +
`If you are using a previous version of <script setup>, please ` +
`consult the updated RFC at https://github.com/vuejs/rfcs/pull/227.`,
node,
)
}
if (ctx.isTS) {
// move all Type declarations to outer scope
if (
node.type.startsWith('TS') ||
(node.type === 'ExportNamedDeclaration' &&
node.exportKind === 'type') ||
(node.type === 'VariableDeclaration' && node.declare)
) {
if (node.type !== 'TSEnumDeclaration') {
hoistNode(node)
}
}
}
}
// 3 props destructure transform
if (ctx.propsDestructureDecl) {
transformDestructuredProps(ctx, vueImportAliases)
}
// 4. check macro args to make sure it doesn't reference setup scope
// variables
checkInvalidScopeReference(ctx.propsRuntimeDecl, DEFINE_PROPS)
checkInvalidScopeReference(ctx.propsRuntimeDefaults, DEFINE_PROPS)
checkInvalidScopeReference(ctx.propsDestructureDecl, DEFINE_PROPS)
checkInvalidScopeReference(ctx.emitsRuntimeDecl, DEFINE_EMITS)
checkInvalidScopeReference(ctx.optionsRuntimeDecl, DEFINE_OPTIONS)
for (const { runtimeOptionNodes } of Object.values(ctx.modelDecls)) {
for (const node of runtimeOptionNodes) {
checkInvalidScopeReference(node, DEFINE_MODEL)
}
}
// 5. remove non-script content
if (script) {
if (startOffset < scriptStartOffset!) {
// <script setup> before <script>
ctx.s.remove(0, startOffset)
ctx.s.remove(endOffset, scriptStartOffset!)
ctx.s.remove(scriptEndOffset!, source.length)
} else {
// <script> before <script setup>
ctx.s.remove(0, scriptStartOffset!)
ctx.s.remove(scriptEndOffset!, startOffset)
ctx.s.remove(endOffset, source.length)
}
} else {
// only <script setup>
ctx.s.remove(0, startOffset)
ctx.s.remove(endOffset, source.length)
}
// 6. analyze binding metadata
// `defineProps` & `defineModel` also register props bindings
if (scriptAst) {
Object.assign(ctx.bindingMetadata, analyzeScriptBindings(scriptAst.body))
}
for (const [key, { isType, imported, source }] of Object.entries(
ctx.userImports,
)) {
if (isType) continue
ctx.bindingMetadata[key] =
imported === '*' ||
(imported === 'default' && source.endsWith('.vue')) ||
source === 'vue'
? BindingTypes.SETUP_CONST
: BindingTypes.SETUP_MAYBE_REF
}
for (const key in scriptBindings) {
ctx.bindingMetadata[key] = scriptBindings[key]
}
for (const key in setupBindings) {
ctx.bindingMetadata[key] = setupBindings[key]
}
// known ref bindings
if (refBindings) {
for (const key of refBindings) {
ctx.bindingMetadata[key] = BindingTypes.SETUP_REF
}
}
// 7. inject `useCssVars` calls
if (
sfc.cssVars.length &&
// no need to do this when targeting SSR
!options.templateOptions?.ssr
) {
ctx.helperImports.add(CSS_VARS_HELPER)
ctx.helperImports.add('unref')
ctx.s.prependLeft(
startOffset,
`\n${genCssVarsCode(
sfc.cssVars,
ctx.bindingMetadata,
scopeId,
!!options.isProd,
)}\n`,
)
}
// 8. finalize setup() argument signature
let args = `__props`
if (ctx.propsTypeDecl) {
// mark as any and only cast on assignment
// since the user defined complex types may be incompatible with the
// inferred type from generated runtime declarations
args += `: any`
}
// inject user assignment of props
// we use a default __props so that template expressions referencing props
// can use it directly
if (ctx.propsDecl) {
if (ctx.propsDestructureRestId) {
ctx.s.overwrite(
startOffset + ctx.propsCall!.start!,
startOffset + ctx.propsCall!.end!,
`${ctx.helper(`createPropsRestProxy`)}(__props, ${JSON.stringify(
Object.keys(ctx.propsDestructuredBindings),
)})`,
)
ctx.s.overwrite(
startOffset + ctx.propsDestructureDecl!.start!,
startOffset + ctx.propsDestructureDecl!.end!,
ctx.propsDestructureRestId,
)
} else if (!ctx.propsDestructureDecl) {
ctx.s.overwrite(
startOffset + ctx.propsCall!.start!,
startOffset + ctx.propsCall!.end!,
'__props',
)
}
}
// inject temp variables for async context preservation
if (hasAwait) {
const any = ctx.isTS ? `: any` : ``
ctx.s.prependLeft(startOffset, `\nlet __temp${any}, __restore${any}\n`)
}
const destructureElements =
ctx.hasDefineExposeCall || !options.inlineTemplate
? [`expose: __expose`]
: []
if (ctx.emitDecl) {
destructureElements.push(`emit: __emit`)
}
if (destructureElements.length) {
args += `, { ${destructureElements.join(', ')} }`
}
// 9. generate return statement
let returned
if (
!options.inlineTemplate ||
(!sfc.template && ctx.hasDefaultExportRender)
) {
// non-inline mode, or has manual render in normal <script>
// return bindings from script and script setup
const allBindings: Record<string, any> = {
...scriptBindings,
...setupBindings,
}
for (const key in ctx.userImports) {
if (
!ctx.userImports[key].isType &&
ctx.userImports[key].isUsedInTemplate
) {
allBindings[key] = true
}
}
returned = `{ `
for (const key in allBindings) {
if (
allBindings[key] === true &&
ctx.userImports[key].source !== 'vue' &&
!ctx.userImports[key].source.endsWith('.vue')
) {
// generate getter for import bindings
// skip vue imports since we know they will never change
returned += `get ${key}() { return ${key} }, `
} else if (ctx.bindingMetadata[key] === BindingTypes.SETUP_LET) {
// local let binding, also add setter
const setArg = key === 'v' ? `_v` : `v`
returned +=
`get ${key}() { return ${key} }, ` +
`set ${key}(${setArg}) { ${key} = ${setArg} }, `
} else {
returned += `${key}, `
}
}
returned = returned.replace(/, $/, '') + ` }`
} else {
// inline mode
if (sfc.template && !sfc.template.src) {
if (options.templateOptions && options.templateOptions.ssr) {
hasInlinedSsrRenderFn = true
}
// inline render function mode - we are going to compile the template and
// inline it right here
const { code, ast, preamble, tips, errors } = compileTemplate({
filename,
ast: sfc.template.ast,
source: sfc.template.content,
inMap: sfc.template.map,
...options.templateOptions,
id: scopeId,
scoped: sfc.styles.some(s => s.scoped),
isProd: options.isProd,
ssrCssVars: sfc.cssVars,
compilerOptions: {
...(options.templateOptions &&
options.templateOptions.compilerOptions),
inline: true,
isTS: ctx.isTS,
bindingMetadata: ctx.bindingMetadata,
},
})
if (tips.length) {
tips.forEach(warnOnce)
}
const err = errors[0]
if (typeof err === 'string') {
throw new Error(err)
} else if (err) {
if (err.loc) {
err.message +=
`\n\n` +
sfc.filename +
'\n' +
generateCodeFrame(
source,
err.loc.start.offset,
err.loc.end.offset,
) +
`\n`
}
throw err
}
if (preamble) {
ctx.s.prepend(preamble)
}
// avoid duplicated unref import
// as this may get injected by the render function preamble OR the
// css vars codegen
if (ast && ast.helpers.has(UNREF)) {
ctx.helperImports.delete('unref')
}
returned = code
} else {
returned = `() => {}`
}
}
if (!options.inlineTemplate && !__TEST__) {
// in non-inline mode, the `__isScriptSetup: true` flag is used by
// componentPublicInstance proxy to allow properties that start with $ or _
ctx.s.appendRight(
endOffset,
`\nconst __returned__ = ${returned}\n` +
`Object.defineProperty(__returned__, '__isScriptSetup', { enumerable: false, value: true })\n` +
`return __returned__` +
`\n}\n\n`,
)
} else {
ctx.s.appendRight(endOffset, `\nreturn ${returned}\n}\n\n`)
}
// 10. finalize default export
const genDefaultAs = options.genDefaultAs
? `const ${options.genDefaultAs} =`
: `export default`
let runtimeOptions = ``
if (!ctx.hasDefaultExportName && filename && filename !== DEFAULT_FILENAME) {
const match = filename.match(/([^/\\]+)\.\w+$/)
if (match) {
runtimeOptions += `\n __name: '${match[1]}',`
}
}
if (hasInlinedSsrRenderFn) {
runtimeOptions += `\n __ssrInlineRender: true,`
}
const propsDecl = genRuntimeProps(ctx)
if (propsDecl) runtimeOptions += `\n props: ${propsDecl},`
const emitsDecl = genRuntimeEmits(ctx)
if (emitsDecl) runtimeOptions += `\n emits: ${emitsDecl},`
let definedOptions = ''
if (ctx.optionsRuntimeDecl) {
definedOptions = scriptSetup.content
.slice(ctx.optionsRuntimeDecl.start!, ctx.optionsRuntimeDecl.end!)
.trim()
}
// <script setup> components are closed by default. If the user did not
// explicitly call `defineExpose`, call expose() with no args.
const exposeCall =
ctx.hasDefineExposeCall || options.inlineTemplate ? `` : ` __expose();\n`
// wrap setup code with function.
if (ctx.isTS) {
// for TS, make sure the exported type is still valid type with
// correct props information
// we have to use object spread for types to be merged properly
// user's TS setting should compile it down to proper targets
// export default defineComponent({ ...__default__, ... })
const def =
(defaultExport ? `\n ...${normalScriptDefaultVar},` : ``) +
(definedOptions ? `\n ...${definedOptions},` : '')
ctx.s.prependLeft(
startOffset,
`\n${genDefaultAs} /*@__PURE__*/${ctx.helper(
`defineComponent`,
)}({${def}${runtimeOptions}\n ${
hasAwait ? `async ` : ``
}setup(${args}) {\n${exposeCall}`,
)
ctx.s.appendRight(endOffset, `})`)
} else {
if (defaultExport || definedOptions) {
// without TS, can't rely on rest spread, so we use Object.assign
// export default Object.assign(__default__, { ... })
ctx.s.prependLeft(
startOffset,
`\n${genDefaultAs} /*@__PURE__*/Object.assign(${
defaultExport ? `${normalScriptDefaultVar}, ` : ''
}${definedOptions ? `${definedOptions}, ` : ''}{${runtimeOptions}\n ` +
`${hasAwait ? `async ` : ``}setup(${args}) {\n${exposeCall}`,
)
ctx.s.appendRight(endOffset, `})`)
} else {
ctx.s.prependLeft(
startOffset,
`\n${genDefaultAs} {${runtimeOptions}\n ` +
`${hasAwait ? `async ` : ``}setup(${args}) {\n${exposeCall}`,
)
ctx.s.appendRight(endOffset, `}`)
}
}
// 11. finalize Vue helper imports
if (ctx.helperImports.size > 0) {
const runtimeModuleName =
options.templateOptions?.compilerOptions?.runtimeModuleName
const importSrc = runtimeModuleName
? JSON.stringify(runtimeModuleName)
: `'vue'`
ctx.s.prepend(
`import { ${[...ctx.helperImports]
.map(h => `${h} as _${h}`)
.join(', ')} } from ${importSrc}\n`,
)
}
return {
...scriptSetup,
bindings: ctx.bindingMetadata,
imports: ctx.userImports,
content: ctx.s.toString(),
map:
options.sourceMap !== false
? (ctx.s.generateMap({
source: filename,
hires: true,
includeContent: true,
}) as unknown as RawSourceMap)
: undefined,
scriptAst: scriptAst?.body,
scriptSetupAst: scriptSetupAst?.body,
deps: ctx.deps ? [...ctx.deps] : undefined,
}
}
function registerBinding(
bindings: Record<string, BindingTypes>,
node: Identifier,
type: BindingTypes,
) {
bindings[node.name] = type
}
function walkDeclaration(
from: 'script' | 'scriptSetup',
node: Declaration,
bindings: Record<string, BindingTypes>,
userImportAliases: Record<string, string>,
hoistStatic: boolean,
isPropsDestructureEnabled = false,
): boolean {
let isAllLiteral = false
if (node.type === 'VariableDeclaration') {
const isConst = node.kind === 'const'
isAllLiteral =
isConst &&
node.declarations.every(
decl => decl.id.type === 'Identifier' && isStaticNode(decl.init!),
)
// export const foo = ...
for (const { id, init: _init } of node.declarations) {
const init = _init && unwrapTSNode(_init)
const isConstMacroCall =
isConst &&
isCallOf(
init,
c =>
c === DEFINE_PROPS ||
c === DEFINE_EMITS ||
c === WITH_DEFAULTS ||
c === DEFINE_SLOTS,
)
if (id.type === 'Identifier') {
let bindingType
const userReactiveBinding = userImportAliases['reactive']
if (
(hoistStatic || from === 'script') &&
(isAllLiteral || (isConst && isStaticNode(init!)))
) {
bindingType = BindingTypes.LITERAL_CONST
} else if (isCallOf(init, userReactiveBinding)) {
// treat reactive() calls as let since it's meant to be mutable
bindingType = isConst
? BindingTypes.SETUP_REACTIVE_CONST
: BindingTypes.SETUP_LET
} else if (
// if a declaration is a const literal, we can mark it so that
// the generated render fn code doesn't need to unref() it
isConstMacroCall ||
(isConst && canNeverBeRef(init!, userReactiveBinding))
) {
bindingType = isCallOf(init, DEFINE_PROPS)
? BindingTypes.SETUP_REACTIVE_CONST
: BindingTypes.SETUP_CONST
} else if (isConst) {
if (
isCallOf(
init,
m =>
m === userImportAliases['ref'] ||
m === userImportAliases['computed'] ||
m === userImportAliases['shallowRef'] ||
m === userImportAliases['customRef'] ||
m === userImportAliases['toRef'] ||
m === DEFINE_MODEL,
)
) {
bindingType = BindingTypes.SETUP_REF
} else {
bindingType = BindingTypes.SETUP_MAYBE_REF
}
} else {
bindingType = BindingTypes.SETUP_LET
}
registerBinding(bindings, id, bindingType)
} else {
if (isCallOf(init, DEFINE_PROPS) && isPropsDestructureEnabled) {
continue
}
if (id.type === 'ObjectPattern') {
walkObjectPattern(id, bindings, isConst, isConstMacroCall)
} else if (id.type === 'ArrayPattern') {
walkArrayPattern(id, bindings, isConst, isConstMacroCall)
}
}
}
} else if (node.type === 'TSEnumDeclaration') {
isAllLiteral = node.members.every(
member => !member.initializer || isStaticNode(member.initializer),
)
bindings[node.id!.name] = isAllLiteral
? BindingTypes.LITERAL_CONST
: BindingTypes.SETUP_CONST
} else if (
node.type === 'FunctionDeclaration' ||
node.type === 'ClassDeclaration'
) {
// export function foo() {} / export class Foo {}
// export declarations must be named.
bindings[node.id!.name] = BindingTypes.SETUP_CONST
}
return isAllLiteral
}
function walkObjectPattern(
node: ObjectPattern,
bindings: Record<string, BindingTypes>,
isConst: boolean,
isDefineCall = false,
) {
for (const p of node.properties) {
if (p.type === 'ObjectProperty') {
if (p.key.type === 'Identifier' && p.key === p.value) {
// shorthand: const { x } = ...
const type = isDefineCall
? BindingTypes.SETUP_CONST
: isConst
? BindingTypes.SETUP_MAYBE_REF
: BindingTypes.SETUP_LET
registerBinding(bindings, p.key, type)
} else {
walkPattern(p.value, bindings, isConst, isDefineCall)
}
} else {
// ...rest
// argument can only be identifier when destructuring
const type = isConst ? BindingTypes.SETUP_CONST : BindingTypes.SETUP_LET
registerBinding(bindings, p.argument as Identifier, type)
}
}
}
function walkArrayPattern(
node: ArrayPattern,
bindings: Record<string, BindingTypes>,
isConst: boolean,
isDefineCall = false,
) {
for (const e of node.elements) {
e && walkPattern(e, bindings, isConst, isDefineCall)
}
}
function walkPattern(
node: Node,
bindings: Record<string, BindingTypes>,
isConst: boolean,
isDefineCall = false,
) {
if (node.type === 'Identifier') {
const type = isDefineCall
? BindingTypes.SETUP_CONST
: isConst
? BindingTypes.SETUP_MAYBE_REF
: BindingTypes.SETUP_LET
registerBinding(bindings, node, type)
} else if (node.type === 'RestElement') {
// argument can only be identifier when destructuring
const type = isConst ? BindingTypes.SETUP_CONST : BindingTypes.SETUP_LET
registerBinding(bindings, node.argument as Identifier, type)
} else if (node.type === 'ObjectPattern') {
walkObjectPattern(node, bindings, isConst)
} else if (node.type === 'ArrayPattern') {
walkArrayPattern(node, bindings, isConst)
} else if (node.type === 'AssignmentPattern') {
if (node.left.type === 'Identifier') {
const type = isDefineCall
? BindingTypes.SETUP_CONST
: isConst
? BindingTypes.SETUP_MAYBE_REF
: BindingTypes.SETUP_LET
registerBinding(bindings, node.left, type)
} else {
walkPattern(node.left, bindings, isConst)
}
}
}
function canNeverBeRef(node: Node, userReactiveImport?: string): boolean {
if (isCallOf(node, userReactiveImport)) {
return true
}
switch (node.type) {
case 'UnaryExpression':
case 'BinaryExpression':
case 'ArrayExpression':
case 'ObjectExpression':
case 'FunctionExpression':
case 'ArrowFunctionExpression':
case 'UpdateExpression':
case 'ClassExpression':
case 'TaggedTemplateExpression':
return true
case 'SequenceExpression':
return canNeverBeRef(
node.expressions[node.expressions.length - 1],
userReactiveImport,
)
default:
if (isLiteralNode(node)) {
return true
}
return false
}
}
function isStaticNode(node: Node): boolean {
node = unwrapTSNode(node)
switch (node.type) {
case 'UnaryExpression': // void 0, !true
return isStaticNode(node.argument)
case 'LogicalExpression': // 1 > 2
case 'BinaryExpression': // 1 + 2
return isStaticNode(node.left) && isStaticNode(node.right)
case 'ConditionalExpression': {
// 1 ? 2 : 3
return (
isStaticNode(node.test) &&
isStaticNode(node.consequent) &&
isStaticNode(node.alternate)
)
}
case 'SequenceExpression': // (1, 2)
case 'TemplateLiteral': // `foo${1}`
return node.expressions.every(expr => isStaticNode(expr))
case 'ParenthesizedExpression': // (1)
return isStaticNode(node.expression)
case 'StringLiteral':
case 'NumericLiteral':
case 'BooleanLiteral':
case 'NullLiteral':
case 'BigIntLiteral':
return true
}
return false
}
|