Method set

packages/svelte/src/reactivity/map.js:160–193

* @param {K} key * @param {V} value *

(key, value)

	 * @param {V} value
	 * */
	set(key, value) {
		var sources = this.#sources;
		var s = sources.get(key);
		var prev_res = super.get(key);
		var res = super.set(key, value);
		var version = this.#version;

		if (s === undefined) {
			s = this.#source(0);

			if (DEV) {
				tag(s, `SvelteMap get(${label(key)})`);
			}

			sources.set(key, s);
			set(this.#size, super.size);
			increment(version);
		} else if (prev_res !== value) {
			increment(s);

			// if not every reaction of s is a reaction of version we need to also include version
			var v_reactions = version.reactions === null ? null : new Set(version.reactions);
			var needs_version_increase =
				v_reactions === null ||
				!s.reactions?.every((r) =>
					/** @type {NonNullable<typeof v_reactions>} */ (v_reactions).has(r)
				);
			if (needs_version_increase) {
				increment(version);
			}
		}

		return res;
	}

	/** @param {K} key */
	delete(key) {