transform_module() — svelte Function Reference

Architecture documentation for the transform_module() function in index.js from the svelte codebase.

Function javascript Compiler Transformer calls 3 called by 1

Entity Profile

Compiler→ Transformer→ transform_module() — svelte Function Reference

Dependency Diagram

graph TD
  0ccad5bf_e752_7e10_164a_ca0ec818db6f["transform_module()"]
  f1cb032f_d7a0_6877_cebc_2e5f4505e958["index.js"]
  0ccad5bf_e752_7e10_164a_ca0ec818db6f -->|defined in| f1cb032f_d7a0_6877_cebc_2e5f4505e958
  39054977_bbc9_e3d5_4935_6918741df7be["compileModule()"]
  39054977_bbc9_e3d5_4935_6918741df7be -->|calls| 0ccad5bf_e752_7e10_164a_ca0ec818db6f
  c54f6fdd_cd90_f775_fe11_a4c398d8d8e5["server_module()"]
  0ccad5bf_e752_7e10_164a_ca0ec818db6f -->|calls| c54f6fdd_cd90_f775_fe11_a4c398d8d8e5
  f67152db_9574_dae2_c7ba_381253877c55["client_module()"]
  0ccad5bf_e752_7e10_164a_ca0ec818db6f -->|calls| f67152db_9574_dae2_c7ba_381253877c55
  8164d272_5d30_264a_68d0_0339d7d146e1["get_source_name()"]
  0ccad5bf_e752_7e10_164a_ca0ec818db6f -->|calls| 8164d272_5d30_264a_68d0_0339d7d146e1
  style 0ccad5bf_e752_7e10_164a_ca0ec818db6f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/3-transform/index.js lines 70–118

export function transform_module(analysis, source, options) {
	if (options.generate === false) {
		return {
			js: /** @type {any} */ (null),
			css: null,
			warnings: state.warnings, // set afterwards
			metadata: {
				runes: true
			},
			ast: /** @type {any} */ (null) // set afterwards
		};
	}

	const program =
		options.generate === 'server'
			? server_module(analysis, options)
			: client_module(analysis, options);

	const basename = options.filename.split(/[/\\]/).at(-1);
	if (program.body.length > 0) {
		program.body[0].leadingComments = [
			{
				type: 'Block',
				value: ` ${basename} generated by Svelte v${VERSION} `
			}
		];
	}

	const js = print(/** @type {Node} */ (program), ts({ comments: analysis.comments }), {
		// include source content; makes it easier/more robust looking up the source map code
		// (else esrap does return null for source and sourceMapContent which may trip up tooling)
		sourceMapContent: source,
		sourceMapSource: get_source_name(options.filename, undefined, 'input.svelte.js')
	});

	// prepend comment
	js.code = `/* ${basename} generated by Svelte v${VERSION} */\n${js.code}`;
	js.map.mappings = ';' + js.map.mappings;

	return {
		js,
		css: null,
		metadata: {
			runes: true
		},
		warnings: state.warnings, // set afterwards
		ast: /** @type {any} */ (null) // set afterwards
	};
}