SystemPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ParserHelpers = require("../ParserHelpers");
class SystemPlugin {
constructor(options) {
this.options = options;
}
apply(compiler) {
compiler.plugin("compilation", (compilation, params) => {
params.normalModuleFactory.plugin("parser", (parser, parserOptions) => {
if(typeof parserOptions.system !== "undefined" && !parserOptions.system)
return;
function setNotSupported(name) {
parser.plugin("evaluate typeof " + name, ParserHelpers.evaluateToString("undefined"));
parser.plugin("expression " + name,
ParserHelpers.expressionIsUnsupported(name + " is not supported by webpack.")
);
}
parser.plugin("typeof System.import", ParserHelpers.toConstantDependency(JSON.stringify("function")));
parser.plugin("evaluate typeof System.import", ParserHelpers.evaluateToString("function"));
parser.plugin("typeof System", ParserHelpers.toConstantDependency(JSON.stringify("object")));
parser.plugin("evaluate typeof System", ParserHelpers.evaluateToString("object"));
setNotSupported("System.set");
setNotSupported("System.get");
setNotSupported("System.register");
parser.plugin("expression System", function() {
const systemPolyfillRequire = ParserHelpers.requireFileAsExpression(
this.state.module.context, require.resolve("../../buildin/system.js"));
return ParserHelpers.addParsedVariableToModule(this, "System", systemPolyfillRequire);
});
});
});
}
}
module.exports = SystemPlugin;