get_node_range() — svelte Function Reference

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

Function javascript Compiler Transformer called by 1

Entity Profile

Compiler→ Transformer→ get_node_range() — svelte Function Reference

Dependency Diagram

graph TD
  7b7a865f_d980_e5dd_7be6_9dbf5e90264f["get_node_range()"]
  cab41022_1b55_3b7a_06c6_b90763bbea47["index.js"]
  7b7a865f_d980_e5dd_7be6_9dbf5e90264f -->|defined in| cab41022_1b55_3b7a_06c6_b90763bbea47
  ffed8565_a534_8183_a11f_bcffae15897e["migrate()"]
  ffed8565_a534_8183_a11f_bcffae15897e -->|calls| 7b7a865f_d980_e5dd_7be6_9dbf5e90264f
  style 7b7a865f_d980_e5dd_7be6_9dbf5e90264f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/migrate/index.js lines 1820–1843

function get_node_range(source, node) {
	const first_leading_comment = node.leadingComments?.[0];
	const last_trailing_comment = node.trailingComments?.[node.trailingComments.length - 1];

	// @ts-expect-error the type of `Comment` seems to be wrong...the node actually contains
	// start and end but the type seems to only contain a `range` (which doesn't actually exists)
	let start = /** @type {number} */ (first_leading_comment?.start ?? node.start);
	// @ts-expect-error the type of `Comment` seems to be wrong...the node actually contains
	// start and end but the type seems to only contain a `range` (which doesn't actually exists)
	let end = /** @type {number} */ (last_trailing_comment?.end ?? node.end);

	let idx = start;
	while (source[idx - 1] !== '\n' && source[idx - 1] !== '\r') {
		idx--;
		if (source[idx] !== ' ' && source[idx] !== '\t') {
			idx = start;
			break;
		}
	}

	start = idx;

	return { start, end };
}