read_identifier() — svelte Function Reference

Architecture documentation for the read_identifier() function in style.js from the svelte codebase.

Function javascript Compiler Transformer calls 1 called by 3

Entity Profile

Compiler→ Transformer→ read_identifier() — svelte Function Reference

Dependency Diagram

graph TD
  7a0ffc5c_c833_ca6c_fe33_60f0f57e9307["read_identifier()"]
  251e2338_f8b8_69b4_b2e5_29ee7decbfa6["style.js"]
  7a0ffc5c_c833_ca6c_fe33_60f0f57e9307 -->|defined in| 251e2338_f8b8_69b4_b2e5_29ee7decbfa6
  53e6c97d_9ffd_d8ad_0e88_afabeb05753a["read_at_rule()"]
  53e6c97d_9ffd_d8ad_0e88_afabeb05753a -->|calls| 7a0ffc5c_c833_ca6c_fe33_60f0f57e9307
  fcabd261_14f2_2647_3794_39b7100eda95["read_selector()"]
  fcabd261_14f2_2647_3794_39b7100eda95 -->|calls| 7a0ffc5c_c833_ca6c_fe33_60f0f57e9307
  774b1b65_7dad_02c2_b4ca_c77fc0d799ec["read_attribute()"]
  774b1b65_7dad_02c2_b4ca_c77fc0d799ec -->|calls| 7a0ffc5c_c833_ca6c_fe33_60f0f57e9307
  0a2d5c71_e630_94de_fdd2_227628d4c42c["css_expected_identifier()"]
  7a0ffc5c_c833_ca6c_fe33_60f0f57e9307 -->|calls| 0a2d5c71_e630_94de_fdd2_227628d4c42c
  style 7a0ffc5c_c833_ca6c_fe33_60f0f57e9307 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/1-parse/read/style.js lines 574–610

function read_identifier(parser) {
	const start = parser.index;

	let identifier = '';

	if (parser.match_regex(REGEX_LEADING_HYPHEN_OR_DIGIT)) {
		e.css_expected_identifier(start);
	}

	while (parser.index < parser.template.length) {
		const char = parser.template[parser.index];
		if (char === '\\') {
			const sequence = parser.match_regex(REGEX_UNICODE_SEQUENCE);
			if (sequence) {
				identifier += String.fromCodePoint(parseInt(sequence.slice(1), 16));
				parser.index += sequence.length;
			} else {
				identifier += '\\' + parser.template[parser.index + 1];
				parser.index += 2;
			}
		} else if (
			/** @type {number} */ (char.codePointAt(0)) >= 160 ||
			REGEX_VALID_IDENTIFIER_CHAR.test(char)
		) {
			identifier += char;
			parser.index++;
		} else {
			break;
		}
	}

	if (identifier === '') {
		e.css_expected_identifier(start);
	}

	return identifier;
}