feat: add preload switch config

vitejs · Jul 2, 2021 · d2abc41 · d2abc41
1 parent bd34203
commit d2abc41
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Showing 4 changed files with 19 additions and 5 deletions.
diff --git a/docs/config/index.md b/docs/config/index.md
@@ -560,6 +560,13 @@ createServer()
 
   Note: the polyfill does **not** apply to [Library Mode](/guide/build#library-mode). If you need to support browsers without native dynamic import, you should probably avoid using it in your library.
 
+### build.autoPreload
+
+- **Type:** `boolean`
+- **Default:** `false`
+
+  Specify the output directory (relative to [project root](/guide/#index-html-and-project-root)).
+
 ### build.outDir
 
 - **Type:** `string`

diff --git a/packages/vite/src/node/build.ts b/packages/vite/src/node/build.ts
@@ -69,6 +69,12 @@ export interface BuildOptions {
    * @default false
    */
   polyfillDynamicImport?: boolean
+  /**
+   * whether to inject `__vitePreload` method.
+   * Note: does not apply to library mode.
+   * @default true
+   */
+  autoPreload?: boolean
   /**
    * Directory relative from `root` where build output will be placed. If the
    * directory exists, it will be removed before the build.
@@ -209,6 +215,7 @@ export function resolveBuildOptions(raw?: BuildOptions): ResolvedBuildOptions {
   const resolved: ResolvedBuildOptions = {
     target: 'modules',
     polyfillDynamicImport: false,
+    autoPreload: true,
     outDir: 'dist',
     assetsDir: 'assets',
     assetsInlineLimit: 4096,

diff --git a/packages/vite/src/node/importGlob.ts b/packages/vite/src/node/importGlob.ts
@@ -15,7 +15,7 @@ export async function transformImportGlob(
   importIndex: number,
   root: string,
   normalizeUrl?: (url: string, pos: number) => Promise<[string, string]>,
-  ssr = false
+  preload = true
 ): Promise<{
   importsString: string
   imports: string[]
@@ -87,7 +87,7 @@ export async function transformImportGlob(
       entries += ` ${JSON.stringify(file)}: ${identifier},`
     } else {
       let imp = `import(${JSON.stringify(importee)})`
-      if (!normalizeUrl && !ssr) {
+      if (!normalizeUrl && preload) {
         imp =
           `(${isModernFlag}` +
           `? ${preloadMethod}(()=>${imp},"${preloadMarker}")` +

diff --git a/packages/vite/src/node/plugins/importAnalysisBuild.ts b/packages/vite/src/node/plugins/importAnalysisBuild.ts
@@ -142,17 +142,17 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
               index,
               config.root,
               undefined,
-              ssr
+              !ssr && config.build.autoPreload
             )
           str().prepend(importsString)
           str().overwrite(expStart, endIndex, exp)
-          if (!isEager) {
+          if (!isEager && config.build.autoPreload) {
             needPreloadHelper = true
           }
           continue
         }
 
-        if (dynamicIndex > -1 && !ssr) {
+        if (dynamicIndex > -1 && !ssr && config.build.autoPreload) {
           needPreloadHelper = true
           const dynamicEnd = source.indexOf(`)`, end) + 1
           const original = source.slice(dynamicIndex, dynamicEnd)