is_empty() — svelte Function Reference

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

Function javascript Compiler Analyzer calls 1 called by 1

Entity Profile

Compiler→ Analyzer→ is_empty() — svelte Function Reference

Dependency Diagram

graph TD
  89bfdfe0_279c_4966_749b_58ebd6de97ce["is_empty()"]
  194b07ed_c18e_6587_618d_b4b4d02442e0["index.js"]
  89bfdfe0_279c_4966_749b_58ebd6de97ce -->|defined in| 194b07ed_c18e_6587_618d_b4b4d02442e0
  f2626db1_8d8a_52b8_8277_273f5a8d1261["visitors.Rule()"]
  f2626db1_8d8a_52b8_8277_273f5a8d1261 -->|calls| 89bfdfe0_279c_4966_749b_58ebd6de97ce
  2875e67d_6ea2_6e07_649a_ad100c54e869["is_used()"]
  89bfdfe0_279c_4966_749b_58ebd6de97ce -->|calls| 2875e67d_6ea2_6e07_649a_ad100c54e869
  style 89bfdfe0_279c_4966_749b_58ebd6de97ce fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/3-transform/css/index.js lines 424–446

function is_empty(rule, is_in_global_block) {
	if (rule.metadata.is_global_block) {
		return rule.block.children.length === 0;
	}

	for (const child of rule.block.children) {
		if (child.type === 'Declaration') {
			return false;
		}

		if (child.type === 'Rule') {
			if ((is_used(child) || is_in_global_block) && !is_empty(child, is_in_global_block)) {
				return false;
			}
		}

		if (child.type === 'Atrule') {
			if (child.block === null || child.block.children.length > 0) return false;
		}
	}

	return true;
}