process_tag() — svelte Function Reference

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

Function javascript Compiler Transformer calls 6 called by 1

Entity Profile

Compiler→ Transformer→ process_tag() — svelte Function Reference

Dependency Diagram

graph TD
  3d6e4414_b36d_fff0_63de_9aea1fab6869["process_tag()"]
  ccf6927a_1f1b_1dda_8616_80903a72ba16["index.js"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|defined in| ccf6927a_1f1b_1dda_8616_80903a72ba16
  a7a70deb_64ca_bb14_028e_9cb3aec87b0f["preprocess()"]
  a7a70deb_64ca_bb14_028e_9cb3aec87b0f -->|calls| 3d6e4414_b36d_fff0_63de_9aea1fab6869
  f60b5bcd_c389_6937_b4c0_e720a97b643a["from_source()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| f60b5bcd_c389_6937_b4c0_e720a97b643a
  2f8f22ce_6b99_47f9_f47d_9e47a039bde4["slice_source()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| 2f8f22ce_6b99_47f9_f47d_9e47a039bde4
  082d508a_e627_7a95_fce0_02014a5b6784["parse_tag_attributes()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| 082d508a_e627_7a95_fce0_02014a5b6784
  860c55db_f911_8bca_7055_338865a9f9b0["processed_tag_to_code()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| 860c55db_f911_8bca_7055_338865a9f9b0
  395c4d8f_d709_5627_02c8_e3da7b9cf209["stringify_tag_attributes()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| 395c4d8f_d709_5627_02c8_e3da7b9cf209
  e504078b_ad3f_7265_675b_c14b85115247["replace_in_code()"]
  3d6e4414_b36d_fff0_63de_9aea1fab6869 -->|calls| e504078b_ad3f_7265_675b_c14b85115247
  style 3d6e4414_b36d_fff0_63de_9aea1fab6869 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/preprocess/index.js lines 265–302

async function process_tag(tag_name, preprocessor, source) {
	const { filename, source: markup } = source;
	const tag_regex = tag_name === 'style' ? regex_style_tags : regex_script_tags;

	/**
	 * @type {string[]}
	 */
	const dependencies = [];

	/**
	 * @param {string} tag_with_content
	 * @param {number} tag_offset
	 * @returns {Promise<MappedCode>}
	 */
	async function process_single_tag(tag_with_content, attributes = '', content = '', tag_offset) {
		const no_change = () =>
			MappedCode.from_source(slice_source(tag_with_content, tag_offset, source));
		if (!attributes && !content) return no_change();
		const processed = await preprocessor({
			content: content || '',
			attributes: parse_tag_attributes(attributes || ''),
			markup,
			filename
		});
		if (!processed) return no_change();
		if (processed.dependencies) dependencies.push(...processed.dependencies);
		if (!processed.map && processed.code === content) return no_change();
		return processed_tag_to_code(
			processed,
			tag_name,
			attributes,
			stringify_tag_attributes(processed.attributes) ?? attributes,
			slice_source(content, tag_offset, source)
		);
	}
	const { string, map } = await replace_in_code(tag_regex, process_single_tag, source);
	return { string, map, dependencies };
}