perf: remove regex in ImportMetaURL plugins (#12502)

Author: patak-dev

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

@@ -52,7 +52,7 @@ export function assetImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
           if (!s) s = new MagicString(code)
 
           // potential dynamic template string
-          if (rawUrl[0] === '`' && /\$\{/.test(rawUrl)) {
+          if (rawUrl[0] === '`' && rawUrl.includes('${')) {
             const ast = this.parse(rawUrl)
             const templateLiteral = (ast as any).body[0].expression
             if (templateLiteral.expressions.length) {

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

@@ -126,7 +126,7 @@ export function workerImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
           const rawUrl = code.slice(urlStart, urlEnd)
 
           // potential dynamic template string
-          if (rawUrl[0] === '`' && /\$\{/.test(rawUrl)) {
+          if (rawUrl[0] === '`' && rawUrl.includes('${')) {
             this.error(
               `\`new URL(url, import.meta.url)\` is not supported in dynamic template string.`,
               urlIndex,