Function fire

src/uPlot.js:3394–3404

(evName, a1, a2)

	const hooks = self.hooks = opts.hooks || {};

	function fire(evName, a1, a2) {
		if (deferHooks)
			hooksQueue.push([evName, a1, a2]);
		else {
			if (evName in hooks) {
				hooks[evName].forEach(fn => {
					fn.call(null, self, a1, a2);
				});
			}
		}
	}

	(opts.plugins || []).forEach(p => {
		for (let evName in p.hooks)