compress() — svelte Function Reference

Architecture documentation for the compress() function in hash.js from the svelte codebase.

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Entity Profile

Compiler→ Parser→ compress() — svelte Function Reference

Dependency Diagram

graph TD
  2a2ac188_28fd_31d5_5672_6c04b38aec43["compress()"]
  701d9da6_675f_b6d1_ad30_b067ef212b63["hash.js"]
  2a2ac188_28fd_31d5_5672_6c04b38aec43 -->|defined in| 701d9da6_675f_b6d1_ad30_b067ef212b63
  style 2a2ac188_28fd_31d5_5672_6c04b38aec43 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

playgrounds/sandbox/scripts/hash.js lines 50–70

async function compress(payload) {
	const reader = new Blob([payload])
		.stream()
		.pipeThrough(new CompressionStream('gzip'))
		.getReader();

	let buffer = '';
	for (;;) {
		const { done, value } = await reader.read();

		if (done) {
			reader.releaseLock();
			return btoa(buffer).replaceAll('+', '-').replaceAll('/', '_');
		} else {
			for (let i = 0; i < value.length; i++) {
				// decoding as utf-8 will make btoa reject the string
				buffer += String.fromCharCode(value[i]);
			}
		}
	}
}