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How to decouple React components using IOC

2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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Editor to share with you how to use IOC to decouple React components, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

IOC (inversion of Control) is a programming idea that can decouple components and improve component reusability.

What is IOC?

Let's look at an example:

We have a soldier's class that instantiates a weapon inside the class:

Class Soldier {constructor () {/ / here we instantiate a rifle this.weapon = new Rifle ();} attack () {this.weapon.attack ();}}

Soldiers should have a variety of weapons, but they rely on Rifle internally in the Soldier class.

So when we want to change our weapons from rifles to grenades, we have to rewrite them like this:

/ /... Constructor () {/ / here we instantiate a rifle / / this.weapon = new Rifle (); / / here we instantiate a grenade this.weapon = new Grenade ();} / /.

Ideally, soldiers do not rely on specific weapons and use whatever they have in the ammunition depot.

In this case, IOC comes in handy as an ammunition depot.

Let's rewrite the code:

Step 1: DI (Dependency Injection)

The first step in rewriting is to make soldiers not dependent on specific weapons, but to inject weapons into soldiers as dependencies:

Class Soldier injects weapons as dependencies into constructor (weapon) {this.weapon = weapon;} attack () {this.weapon.attack ();}}

We pass in the instance of the weapon as a parameter of Soldier, so we can call it as follows:

Const S1 = new Soldier (new Rifle ()); const S2 = new Soldier (new Grenade ())

This step is called DI (dependency injection).

Step 2: IOC container

So where do the weapons come from? Next, let's build our arsenal:

Class Armory {constructor () {this.weapon = null;} setWeapon (weapon) {this.weapon = weapon;} getWeapon () {return this.weapon;}}

The arsenal supports weapons storage (setWeapon) and weapons acquisition (getWeapon).

Now, soldiers do not rely on specific weapons, they just need to go to the arsenal to pick up weapons:

Const armory1 = new Armory (); class Soldier {/ / injects weapons as dependencies constructor (armory) {this.weapon = armory.getWeapon ();} attack () {this.weapon.attack ();}}

Dependencies before transformation:

Soldier-- > weapon

Prior to the transformation, the original application (soldier) had full control of the reliance.

Modified dependencies:

Soldier-- > Armory I am a soldier;}}

Finally, instantiate the IOC container to connect the demand side with the dependency:

Import {Container} from "inversify"; import {IArmory, Armory} from ". / armory"; / / instantiate the IOC container export const container = new Container (); / / inject the relying party into the container, where armory is the dependent ID container.bind ("armory") .to (Armory)

At this point, complete a simple IOC for the React component.

More dependencies on business logic can be decoupled by injecting IOC containers.

Hooks can also do IOC through inversify.

These are all the contents of the article "how to decouple React components using IOC". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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