has_content() — svelte Function Reference

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

Function javascript Compiler Transformer called by 1

Entity Profile

Compiler→ Transformer→ has_content() — svelte Function Reference

Dependency Diagram

graph TD
  7cd33d31_694c_80e8_2d52_a5460606f9d7["has_content()"]
  b389a21f_6de7_2a41_34f3_8efbf9045c9c["index.js"]
  7cd33d31_694c_80e8_2d52_a5460606f9d7 -->|defined in| b389a21f_6de7_2a41_34f3_8efbf9045c9c
  c342967b_b314_8027_476d_d085ed0e13f0["check_element()"]
  c342967b_b314_8027_476d_d085ed0e13f0 -->|calls| 7cd33d31_694c_80e8_2d52_a5460606f9d7
  style 7cd33d31_694c_80e8_2d52_a5460606f9d7 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/phases/2-analyze/visitors/shared/a11y/index.js lines 818–851

function has_content(element) {
	for (const node of element.fragment.nodes) {
		if (node.type === 'Text') {
			if (node.data.trim() === '') {
				continue;
			}
		}

		if (node.type === 'RegularElement' || node.type === 'SvelteElement') {
			if (node.attributes.some((a) => a.type === 'Attribute' && a.name === 'popover')) {
				continue;
			}

			if (
				node.name === 'img' &&
				node.attributes.some((node) => node.type === 'Attribute' && node.name === 'alt')
			) {
				return true;
			}

			if (node.name === 'selectedcontent') {
				return true;
			}

			if (!has_content(node)) {
				continue;
			}
		}

		// assume everything else has content — this will result in false positives
		// (e.g. an empty `{#if ...}{/if}`) but that's probably fine
		return true;
	}
}