lib: fix MIME overmatch in data URLs

This commit adds the delimiters ^ and $ to the regex that matches the MIME types for `data:` URLs. PR-URL: #49104Fixes: #48957 Reviewed-By: Geoffrey Booth <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>

Author: andremralves

lib/internal/modules/esm/formats.js

@@ -38,7 +38,7 @@ if (experimentalWasmModules){
 functionmimeToFormat(mime){
 if(
 RegExpPrototypeExec(
-/\s*(text|application)\/javascript\s*(;\s*charset=utf-?8\s*)?/i,
+/^\s*(text|application)\/javascript\s*(;\s*charset=utf-?8\s*)?$/i,
 mime,
 )!==null
 ){return'module';}

test/es-module/test-esm-invalid-data-urls.js

@@ -18,4 +18,7 @@ const assert = require('assert');
 code: 'ERR_UNKNOWN_MODULE_FORMAT',
 message: 'Unknown module format: text/css for URL data:text/css,.error{color: red}',
 });
+awaitassert.rejects(import('data:WRONGtext/javascriptFORMAT,console.log("hello!");'),{
+code: 'ERR_UNKNOWN_MODULE_FORMAT',
+});
 })().then(common.mustCall());