You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.6 KiB
54 lines
1.6 KiB
/* |
|
MIT License http://www.opensource.org/licenses/mit-license.php |
|
Author Tobias Koppers @sokra |
|
*/ |
|
"use strict"; |
|
|
|
const ConstDependency = require("./dependencies/ConstDependency"); |
|
|
|
/** @typedef {import("./Compiler")} Compiler */ |
|
|
|
class UseStrictPlugin { |
|
/** |
|
* @param {Compiler} compiler Webpack Compiler |
|
* @returns {void} |
|
*/ |
|
apply(compiler) { |
|
compiler.hooks.compilation.tap( |
|
"UseStrictPlugin", |
|
(compilation, { normalModuleFactory }) => { |
|
const handler = parser => { |
|
parser.hooks.program.tap("UseStrictPlugin", 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("", firstNode.range); |
|
dep.loc = firstNode.loc; |
|
parser.state.current.addDependency(dep); |
|
parser.state.module.buildInfo.strict = true; |
|
} |
|
}); |
|
}; |
|
|
|
normalModuleFactory.hooks.parser |
|
.for("javascript/auto") |
|
.tap("UseStrictPlugin", handler); |
|
normalModuleFactory.hooks.parser |
|
.for("javascript/dynamic") |
|
.tap("UseStrictPlugin", handler); |
|
normalModuleFactory.hooks.parser |
|
.for("javascript/esm") |
|
.tap("UseStrictPlugin", handler); |
|
} |
|
); |
|
} |
|
} |
|
|
|
module.exports = UseStrictPlugin;
|
|
|