75 lines
2.2 KiB
JavaScript
75 lines
2.2 KiB
JavaScript
|
/*
|
||
|
|
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("./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
|
||
|
|
*/
|
||
|
|
const handler = parser => {
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|