Is it possible to translate the IIFE functions of threejs into ES6 format?

Question

Is it possible to translate the IIFE functions of threejs into ES6 format?

I'm currently facing a challenge in breaking down my threejs project into smaller modules. One specific function that I'm struggling with is the following:

var updateCamera = (function() {
    var euler = new THREE.Euler( 0, 0, 0, 'YXZ' );

    return function() {
        euler.x = motion.rotation.x;
        euler.y = motion.rotation.y;
        camera.quaternion.setFromEuler( euler );

        camera.position.copy( motion.position );
        camera.position.y += 10.0;
    };
})();

If I wanted to separate this updateCamera function into its own file and import it, I'm unsure of how to proceed due to it being self-executing. Can anyone provide assistance?

javascript three.js ecmascript-6

Answer 1

Answer №1

To improve the structure of your code, consider using a default export instead of assigning to the global variable updateCamera. You can remove the IIFE as each module has its own scope, making euler inaccessible and static even at the top level of the module.

It is also recommended to explicitly declare dependencies on Three.js rather than relying on globals.

// updateCamera.js
import { Euler } from 'three';

var euler = new THREE.Euler( 0, 0, 0, 'YXZ' );

export default function updateCamera(camera, motion) {
    euler.x = motion.rotation.x;
    euler.y = motion.rotation.y;
    camera.quaternion.setFromEuler( euler );

    camera.position.copy( motion.position );
    camera.position.y += 10.0;
}

Now you can easily use this function in other modules by importing it like so:

// main.js
import updateCamera from './updateCamera';

…
updateCamer(camera, motion);

Remember to pass camera and motion as arguments when using the function. Avoid relying on global variables; if you prefer not to pass them around everywhere, consider creating a module that exports them for easier access.

import {camera, motion} from './globals';

Answer 2

To improve the structure of your code, consider using a default export instead of assigning to the global variable updateCamera. You can remove the IIFE as each module has its own scope, making euler inaccessible and static even at the top level of the module.

It is also recommended to explicitly declare dependencies on Three.js rather than relying on globals.

// updateCamera.js
import { Euler } from 'three';

var euler = new THREE.Euler( 0, 0, 0, 'YXZ' );

export default function updateCamera(camera, motion) {
    euler.x = motion.rotation.x;
    euler.y = motion.rotation.y;
    camera.quaternion.setFromEuler( euler );

    camera.position.copy( motion.position );
    camera.position.y += 10.0;
}

Now you can easily use this function in other modules by importing it like so:

// main.js
import updateCamera from './updateCamera';

…
updateCamer(camera, motion);

Remember to pass camera and motion as arguments when using the function. Avoid relying on global variables; if you prefer not to pass them around everywhere, consider creating a module that exports them for easier access.

import {camera, motion} from './globals';

Answer 3

Answer №2

Wanting to separate the updateCamera function into its own file and import it has got me puzzled as it's self-executing. Can someone help me out with this?

The only purpose of the IIFE in this scenario is to keep euler "private". Due to each file having its own context in Node, achieving this without the IIFE is quite simple.

// Camera.js

import { Euler } from 'three'

const euler = new Euler( 0, 0, 0, 'YXZ' )

export const updateCamera = (camera, motion) => {
  euler.x = motion.rotation.x
  euler.y = motion.rotation.y
  camera.quaternion.setFromEuler( euler )
  camera.position.copy( motion.position)
  camera.position.y += 10.0
}

Utilizing it looks like this

import { updateCamera } from './Camera'

// const camera = ..., motion = ...

updateCamera(camera, motion)

Answer 4

Wanting to separate the updateCamera function into its own file and import it has got me puzzled as it's self-executing. Can someone help me out with this?

The only purpose of the IIFE in this scenario is to keep euler "private". Due to each file having its own context in Node, achieving this without the IIFE is quite simple.

// Camera.js

import { Euler } from 'three'

const euler = new Euler( 0, 0, 0, 'YXZ' )

export const updateCamera = (camera, motion) => {
  euler.x = motion.rotation.x
  euler.y = motion.rotation.y
  camera.quaternion.setFromEuler( euler )
  camera.position.copy( motion.position)
  camera.position.y += 10.0
}

Utilizing it looks like this

import { updateCamera } from './Camera'

// const camera = ..., motion = ...

updateCamera(camera, motion)

Is it possible to translate the IIFE functions of threejs into ES6 format?

Answer №1

Answer №2

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