Function deleteProperty

packages/svelte/src/internal/client/reactivity/props.js:147–153

(target, key)

		}
	},
	deleteProperty(target, key) {
		// Svelte 4 allowed for deletions on $$restProps
		if (target.exclude.includes(key)) return true;
		target.exclude.push(key);
		update(target.version);
		return true;
	},
	has(target, key) {
		if (target.exclude.includes(key)) return false;
		return key in target.props;