source: trip-planner-front/node_modules/webpack/lib/UseStrictPlugin.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
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1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const ConstDependency = require("./dependencies/ConstDependency");
9
10/** @typedef {import("./Compiler")} Compiler */
11
12class UseStrictPlugin {
13 /**
14 * Apply the plugin
15 * @param {Compiler} compiler the compiler instance
16 * @returns {void}
17 */
18 apply(compiler) {
19 compiler.hooks.compilation.tap(
20 "UseStrictPlugin",
21 (compilation, { normalModuleFactory }) => {
22 const handler = parser => {
23 parser.hooks.program.tap("UseStrictPlugin", ast => {
24 const firstNode = ast.body[0];
25 if (
26 firstNode &&
27 firstNode.type === "ExpressionStatement" &&
28 firstNode.expression.type === "Literal" &&
29 firstNode.expression.value === "use strict"
30 ) {
31 // Remove "use strict" expression. It will be added later by the renderer again.
32 // This is necessary in order to not break the strict mode when webpack prepends code.
33 // @see https://github.com/webpack/webpack/issues/1970
34 const dep = new ConstDependency("", firstNode.range);
35 dep.loc = firstNode.loc;
36 parser.state.module.addPresentationalDependency(dep);
37 parser.state.module.buildInfo.strict = true;
38 }
39 });
40 };
41
42 normalModuleFactory.hooks.parser
43 .for("javascript/auto")
44 .tap("UseStrictPlugin", handler);
45 normalModuleFactory.hooks.parser
46 .for("javascript/dynamic")
47 .tap("UseStrictPlugin", handler);
48 normalModuleFactory.hooks.parser
49 .for("javascript/esm")
50 .tap("UseStrictPlugin", handler);
51 }
52 );
53 }
54}
55
56module.exports = UseStrictPlugin;
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