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8.15 kB
| /** | |
| COPYRIGHT (c) 2017-present James Kyle <me@thejameskyle.com> | |
| MIT License | |
| Permission is hereby granted, free of charge, to any person obtaining | |
| a copy of this software and associated documentation files (the | |
| "Software"), to deal in the Software without restriction, including | |
| without limitation the rights to use, copy, modify, merge, publish, | |
| distribute, sublicense, and/or sell copies of the Software, and to | |
| permit persons to whom the Software is furnished to do so, subject to | |
| the following conditions: | |
| The above copyright notice and this permission notice shall be | |
| included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWAR | |
| */ | |
| // This file is https://github.com/jamiebuilds/react-loadable/blob/master/src/babel.js | |
| // Modified to also look for `next/dynamic` | |
| // Modified to put `webpack` and `modules` under `loadableGenerated` to be backwards compatible with next/dynamic which has a `modules` key | |
| // Modified to support `dynamic(import('something'))` and `dynamic(import('something'), options) | |
| import type { | |
| NodePath, | |
| types as BabelTypes, | |
| } from 'next/dist/compiled/babel/core' | |
| import type { PluginObj } from 'next/dist/compiled/babel/core' | |
| import { relative as relativePath } from 'path' | |
| export default function ({ | |
| types: t, | |
| }: { | |
| types: typeof BabelTypes | |
| }): PluginObj { | |
| return { | |
| visitor: { | |
| ImportDeclaration( | |
| path: NodePath<BabelTypes.ImportDeclaration>, | |
| state: any | |
| ) { | |
| let source = path.node.source.value | |
| if (source !== 'next/dynamic') return | |
| let defaultSpecifier = path.get('specifiers').find((specifier) => { | |
| return specifier.isImportDefaultSpecifier() | |
| }) | |
| if (!defaultSpecifier) return | |
| const bindingName = defaultSpecifier.node.local.name | |
| const binding = path.scope.getBinding(bindingName) | |
| if (!binding) { | |
| return | |
| } | |
| binding.referencePaths.forEach((refPath) => { | |
| let callExpression = refPath.parentPath | |
| if ( | |
| callExpression.isMemberExpression() && | |
| callExpression.node.computed === false | |
| ) { | |
| const property = callExpression.get('property') | |
| if ( | |
| !Array.isArray(property) && | |
| property.isIdentifier({ name: 'Map' }) | |
| ) { | |
| callExpression = callExpression.parentPath | |
| } | |
| } | |
| if (!callExpression.isCallExpression()) return | |
| const callExpression_ = | |
| callExpression as NodePath<BabelTypes.CallExpression> | |
| let args = callExpression_.get('arguments') | |
| if (args.length > 2) { | |
| throw callExpression_.buildCodeFrameError( | |
| 'next/dynamic only accepts 2 arguments' | |
| ) | |
| } | |
| if (!args[0]) { | |
| return | |
| } | |
| let loader | |
| let options | |
| if (args[0].isObjectExpression()) { | |
| options = args[0] | |
| } else { | |
| if (!args[1]) { | |
| callExpression_.node.arguments.push(t.objectExpression([])) | |
| } | |
| // This is needed as the code is modified above | |
| args = callExpression_.get('arguments') | |
| loader = args[0] | |
| options = args[1] | |
| } | |
| if (!options.isObjectExpression()) return | |
| const options_ = options as NodePath<BabelTypes.ObjectExpression> | |
| let properties = options_.get('properties') | |
| let propertiesMap: { | |
| [key: string]: NodePath< | |
| | BabelTypes.ObjectProperty | |
| | BabelTypes.ObjectMethod | |
| | BabelTypes.SpreadElement | |
| | BabelTypes.BooleanLiteral | |
| > | |
| } = {} | |
| properties.forEach((property) => { | |
| const key: any = property.get('key') | |
| propertiesMap[key.node.name] = property | |
| }) | |
| if (propertiesMap.loadableGenerated) { | |
| return | |
| } | |
| if (propertiesMap.loader) { | |
| loader = propertiesMap.loader.get('value') | |
| } | |
| if (propertiesMap.modules) { | |
| loader = propertiesMap.modules.get('value') | |
| } | |
| if (!loader || Array.isArray(loader)) { | |
| return | |
| } | |
| const dynamicImports: BabelTypes.Expression[] = [] | |
| const dynamicKeys: BabelTypes.Expression[] = [] | |
| if (propertiesMap.ssr) { | |
| const ssr = propertiesMap.ssr.get('value') | |
| const nodePath = Array.isArray(ssr) ? undefined : ssr | |
| if (nodePath) { | |
| const nonSSR = | |
| nodePath.node.type === 'BooleanLiteral' && | |
| nodePath.node.value === false | |
| // If `ssr` is set to `false`, erase the loader for server side | |
| if (nonSSR && loader && state.file.opts.caller?.isServer) { | |
| loader.replaceWith( | |
| t.arrowFunctionExpression([], t.nullLiteral(), true) | |
| ) | |
| } | |
| } | |
| } | |
| loader.traverse({ | |
| Import(importPath) { | |
| const importArguments = importPath.parentPath.get('arguments') | |
| if (!Array.isArray(importArguments)) return | |
| const node: any = importArguments[0].node | |
| dynamicImports.push(node) | |
| dynamicKeys.push( | |
| t.binaryExpression( | |
| '+', | |
| t.stringLiteral( | |
| (state.file.opts.caller?.srcDir | |
| ? relativePath( | |
| state.file.opts.caller.srcDir, | |
| state.file.opts.filename | |
| ) | |
| : state.file.opts.filename) + ' -> ' | |
| ), | |
| node | |
| ) | |
| ) | |
| }, | |
| }) | |
| if (!dynamicImports.length) return | |
| options.node.properties.push( | |
| t.objectProperty( | |
| t.identifier('loadableGenerated'), | |
| t.objectExpression( | |
| state.file.opts.caller?.isDev || | |
| state.file.opts.caller?.isServer | |
| ? [ | |
| t.objectProperty( | |
| t.identifier('modules'), | |
| t.arrayExpression(dynamicKeys) | |
| ), | |
| ] | |
| : [ | |
| t.objectProperty( | |
| t.identifier('webpack'), | |
| t.arrowFunctionExpression( | |
| [], | |
| t.arrayExpression( | |
| dynamicImports.map((dynamicImport) => { | |
| return t.callExpression( | |
| t.memberExpression( | |
| t.identifier('require'), | |
| t.identifier('resolveWeak') | |
| ), | |
| [dynamicImport] | |
| ) | |
| }) | |
| ) | |
| ) | |
| ), | |
| ] | |
| ) | |
| ) | |
| ) | |
| // Turns `dynamic(import('something'))` into `dynamic(() => import('something'))` for backwards compat. | |
| // This is the replicate the behavior in versions below Next.js 7 where we magically handled not executing the `import()` too. | |
| // We'll deprecate this behavior and provide a codemod for it in 7.1. | |
| if (loader.isCallExpression()) { | |
| const arrowFunction = t.arrowFunctionExpression([], loader.node) | |
| loader.replaceWith(arrowFunction) | |
| } | |
| }) | |
| }, | |
| }, | |
| } | |
| } | |