fix(legacy)!: remove location.protocol!="file:" condition for modern android webview (vitejs#20179)

Author: maliut

packages/plugin-legacy/README.md

@@ -129,6 +129,8 @@ npm add -D terser
 
   Set to `false` to only output the legacy bundles that support all target browsers.
 
+  This is also useful when running the project locally using `file:` protocol, as loading modern chunks with `type="module"` may trigger CORS restrictions. To avoid this issue, simply set `renderModernChunks` to `false` to exclusively use legacy chunks instead.
+
 ## Browsers that supports ESM but does not support widely-available features
 
 The legacy plugin offers a way to use widely-available features natively in the modern build, while falling back to the legacy build in browsers with native ESM but without those features supported (e.g. Legacy Edge). This feature works by injecting a runtime check and loading the legacy bundle with SystemJs runtime if needed. There are the following drawbacks:
@@ -179,7 +181,7 @@ The current values are:
 
 - `sha256-MS6/3FCg4WjP9gwgaBGwLpRCY6fZBgwmhVCdrPrNf3E=`
 - `sha256-tQjf8gvb2ROOMapIxFvFAYBeUJ0v1HCbOcSmDNXGtDo=`
-- `sha256-VA8O2hAdooB288EpSTrGLl7z3QikbWU9wwoebO/QaYk=`
+- `sha256-ZxAi3a7m9Mzbc+Z1LGuCCK5Xee6reDkEPRas66H9KSo=`
 - `sha256-+5XkZFazzJo8n0iOP4ti/cLCMUudTf//Mzkb7xNPXIc=`
 
 <!--

packages/plugin-legacy/src/snippets.ts

@@ -8,7 +8,7 @@ export const systemJSInlineCode = `System.import(document.getElementById('${lega
 
 const detectModernBrowserVarName = '__vite_is_modern_browser'
 export const detectModernBrowserDetector = `import.meta.url;import("_").catch(()=>1);(async function*(){})().next()`
-export const detectModernBrowserCode = `${detectModernBrowserDetector};if(location.protocol!="file:"){window.${detectModernBrowserVarName}=true}`
+export const detectModernBrowserCode = `${detectModernBrowserDetector};window.${detectModernBrowserVarName}=true`
 export const dynamicFallbackInlineCode = `!function(){if(window.${detectModernBrowserVarName})return;console.warn("vite: loading legacy chunks, syntax error above and the same error below should be ignored");var e=document.getElementById("${legacyPolyfillId}"),n=document.createElement("script");n.src=e.src,n.onload=function(){${systemJSInlineCode}},document.body.appendChild(n)}();`
 
 export const modernChunkLegacyGuard = `export function __vite_legacy_guard(){${detectModernBrowserDetector}};`