fix(build): handle preload treeshaking for braces (#17479)

Author: bluwy

packages/vite/src/node/plugins/importAnalysisBuild.ts

@@ -42,7 +42,7 @@ const preloadMarkerRE = new RegExp(preloadMarker, 'g')
 const dynamicImportPrefixRE = /import\s*\(/
 
 const dynamicImportTreeshakenRE =
-  /((?:\bconst\s+|\blet\s+|\bvar\s+|,\s*)(\{[^}.]+\})\s*=\s*await\s+import\([^)]+\))|(\(\s*await\s+import\([^)]+\)\s*\)(\??\.[\w$]+))|\bimport\([^)]+\)(\s*\.then\([^{]*?\(\s*\{([^}.]+)\})/g
+  /((?:\bconst\s+|\blet\s+|\bvar\s+|,\s*)(\{[^}.]+\})\s*=\s*await\s+import\([^)]+\))|(\(\s*await\s+import\([^)]+\)\s*\)(\??\.[\w$]+))|\bimport\([^)]+\)(\s*\.then\(\s*(?:function\s*)?\(\s*\{([^}.]+)\}\))/g
 
 function toRelativePath(filename: string, importer: string) {
   const relPath = path.posix.relative(path.posix.dirname(importer), filename)
@@ -285,7 +285,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
 
           /* handle `import('foo').then(({foo})=>{})`
            *
-           * match[5]: `.then(({foo}`
+           * match[5]: `.then(({foo})`
            * match[6]: `foo`
            * import end: `import('foo').`
            *                           ^

playground/dynamic-import/nested/index.js

@@ -171,10 +171,15 @@ import(`../nested/nested/${base}.js`).then((mod) => {
   const default2 = (await import('./treeshaken/syntax.js')).default,
     other = () => {}
   const foo = await import('./treeshaken/syntax.js').then((mod) => mod.foo)
+  const foo2 = await import('./treeshaken/syntax.js').then(
+    ({ foo = {} }) => foo,
+  )
+  await import('./treeshaken/syntax.js').then((mod) => mod.foo({ foo }))
   default1()
   default2()
   other()
   foo()
+  foo2()
 })()
 
 import(`../nested/static.js`).then((mod) => {