first commit

app_vue/node_modules/webpack/lib/UseStrictPlugin.js

@@ -0,0 +1,81 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const {
+	JAVASCRIPT_MODULE_TYPE_AUTO,
+	JAVASCRIPT_MODULE_TYPE_DYNAMIC,
+	JAVASCRIPT_MODULE_TYPE_ESM
+} = require("./ModuleTypeConstants");
+const ConstDependency = require("./dependencies/ConstDependency");
+
+/** @typedef {import("../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
+/** @typedef {import("./Compiler")} Compiler */
+/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("./Module").BuildInfo} BuildInfo */
+/** @typedef {import("./javascript/JavascriptParser")} JavascriptParser */
+/** @typedef {import("./javascript/JavascriptParser").Range} Range */
+
+const PLUGIN_NAME = "UseStrictPlugin";
+
+class UseStrictPlugin {
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			PLUGIN_NAME,
+			(compilation, { normalModuleFactory }) => {
+				/**
+				 * @param {JavascriptParser} parser the parser
+				 * @param {JavascriptParserOptions} parserOptions the javascript parser options
+				 */
+				const handler = (parser, parserOptions) => {
+					parser.hooks.program.tap(PLUGIN_NAME, ast => {
+						const firstNode = ast.body[0];
+						if (
+							firstNode &&
+							firstNode.type === "ExpressionStatement" &&
+							firstNode.expression.type === "Literal" &&
+							firstNode.expression.value === "use strict"
+						) {
+							// Remove "use strict" expression. It will be added later by the renderer again.
+							// This is necessary in order to not break the strict mode when webpack prepends code.
+							// @see https://github.com/webpack/webpack/issues/1970
+							const dep = new ConstDependency(
+								"",
+								/** @type {Range} */ (firstNode.range)
+							);
+							dep.loc = /** @type {DependencyLocation} */ (firstNode.loc);
+							parser.state.module.addPresentationalDependency(dep);
+							/** @type {BuildInfo} */
+							(parser.state.module.buildInfo).strict = true;
+						}
+						if (parserOptions.overrideStrict) {
+							/** @type {BuildInfo} */
+							(parser.state.module.buildInfo).strict =
+								parserOptions.overrideStrict === "strict";
+						}
+					});
+				};
+
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_AUTO)
+					.tap(PLUGIN_NAME, handler);
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_DYNAMIC)
+					.tap(PLUGIN_NAME, handler);
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_ESM)
+					.tap(PLUGIN_NAME, handler);
+			}
+		);
+	}
+}
+
+module.exports = UseStrictPlugin;