Method _insert

lib/Hook.js:179–228

(item)

	}

	_insert(item) {
		this._resetCompilation();
		const { taps } = this;
		const stage = typeof item.stage === "number" ? item.stage : 0;

		// Fast path: the overwhelmingly common `hook.tap("name", fn)` case
		// has no `before` and default stage 0. If the list is empty or the
		// last tap's stage is <= the new item's stage the item belongs at
		// the end - append in O(1), skipping the Set allocation and the
		// shift loop.
		if (!(typeof item.before === "string" || Array.isArray(item.before))) {
			const n = taps.length;
			if (n === 0 || (taps[n - 1].stage || 0) <= stage) {
				taps[n] = item;
				return;
			}
		}

		let before;

		if (typeof item.before === "string") {
			before = new Set([item.before]);
		} else if (Array.isArray(item.before)) {
			before = new Set(item.before);
		}

		let i = taps.length;

		while (i > 0) {
			i--;
			const tap = taps[i];
			taps[i + 1] = tap;
			const xStage = tap.stage || 0;
			if (before) {
				if (before.has(tap.name)) {
					before.delete(tap.name);
					continue;
				}
				if (before.size > 0) {
					continue;
				}
			}
			if (xStage > stage) {
				continue;
			}
			i++;
			break;
		}
		taps[i] = item;
	}
}

Object.setPrototypeOf(Hook.prototype, null);