Method codeGeneration

lib/ExternalModule.js:1183–1317

* Generates code and runtime requirements for this module. * @param {CodeGenerationContext} context context for code generation * @returns {CodeGenerationResult} result

({
		runtimeTemplate,
		moduleGraph,
		chunkGraph,
		runtime,
		concatenationScope
	})

	 * @returns {CodeGenerationResult} result
	 */
	codeGeneration({
		runtimeTemplate,
		moduleGraph,
		chunkGraph,
		runtime,
		concatenationScope
	}) {
		const { request, externalType } = this._getRequestAndExternalType();
		switch (externalType) {
			case "asset": {
				/** @type {Sources} */
				const sources = new Map();
				sources.set(
					JAVASCRIPT_TYPE,
					new RawSource(`module.exports = ${JSON.stringify(request)};`)
				);
				/** @type {CodeGenerationResultData} */
				const data = new Map();
				data.set("url", { javascript: /** @type {string} */ (request) });
				return { sources, runtimeRequirements: RUNTIME_REQUIREMENTS, data };
			}
			// TODO webpack 6 remove "css-url" alias
			case "css-url":
			case "asset-url": {
				/** @type {Sources} */
				const sources = new Map();
				/** @type {CodeGenerationResultData} */
				const data = new Map();
				data.set("url", { [ASSET_URL_TYPE]: /** @type {string} */ (request) });
				return { sources, runtimeRequirements: RUNTIME_REQUIREMENTS, data };
			}
			case "css-import": {
				/** @type {Sources} */
				const sources = new Map();
				const dependencyMeta = /** @type {CssImportDependencyMeta} */ (
					this.dependencyMeta
				);
				const layer =
					dependencyMeta.layer !== undefined
						? ` layer(${dependencyMeta.layer})`
						: "";
				const supports = dependencyMeta.supports
					? ` supports(${dependencyMeta.supports})`
					: "";
				const media = dependencyMeta.media ? ` ${dependencyMeta.media}` : "";
				sources.set(
					"css-import",
					new RawSource(
						`@import url(${JSON.stringify(
							request
						)})${layer}${supports}${media};`
					)
				);
				return {
					sources,
					runtimeRequirements: EMPTY_RUNTIME_REQUIREMENTS
				};
			}