Environment
I am working on a Vue 3 Application where I need to run a constant setInterval() in the background (Game Loop).
To achieve this, I have placed the code in store/index.js and invoked it from views/Playground.vue's mounted() lifecycle hook. When leaving the Playground, I make sure to call beforeUnmount() to prevent multiple instances of setInterval() running simultaneously.
// store/index.js
startGameLoop({ commit, dispatch, getters }) {
commit(
"setIntervalId",
setInterval(() => {
dispatch("addPower", getters["ship/getFuelPerSecond"]);
}, 1000)
);
},
// Playground.vue
beforeUnmount() {
clearInterval(this.intervalId);
}
In the upper section of Playground.vue, there is a score displayed that gets updated within the setInterval(). I use a library named gsap to add some visual appeal to the changing numbers.
<h2>Points: {{ tweened.toFixed(0) }}</h2>
watch: {
points(n) {
console.log("gsap");
gsap.to(this, { duration: 0.2, tweened: Number(n) || 0 });
},
},
Issue at Hand
The methods within the Playground.vue seem to be triggering inconsistently, and I am having trouble understanding why.
gsap
The watch function associated with gsap behaves as expected, firing every second similar to the setInterval(), but...
Image
In the center of the Playground, an image is displayed where the src attribute is bound to a method called getEnemyShipImage. Despite my intentions for future programmatic changes to the displayed enemy ship, the method is being called a whopping 34 times per second. This behavior has left me scratching my head.
<img
:class="{ flashing: flash }"
@click="fightEnemy()"
:src="getEnemyShipImage()"
alt=""
/>
getEnemyShipImage() {
console.log("image");
return require("@/assets/ships/ship-001.png");
}