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React + Services

What is React + Services?

React + Services is a thin dependency injection layer on React.js.

Why services?

  • separate your component and application state by introducing a service layer that takes care of propagating changes through your application
  • manage component dependencies in an explicit, testable way
  • there's no events and no lifecycle management - everything is done automatically for you
  • it's tiny and easy to understand - the core is less than 100 lines of code

Installation

npm install react-services

Initialization

In order not to package multiple versions of React with your application, react-services expects getReact function to be defined.

function getReact() { return React; }

Defining services

var defineService = require("react-services").defineService

Service = defineService("NameService", function() {
  return {
    name: function() {
      return "React + Services"
    }      
  };
})

Using services

Define the services consumed by a component in the subscribe field:

var services = require("react-services")

Application = services.defineComponent({
  subscribe: {
    name: "NameService#name"
  },
  render: function() {
    return `<h1>Hello {this.state.name}</h1>`
  }
})

Service = services.defineService("NameService", function() {
  return {
    name: function() {
      return "React + Services"
    }      
  };
})

Service dependencies

Services can depend on other services to produce the correct results. Any changes are automatically propagated to dependent services.

var rservices = require("react-services")

var name = "React + Services";

NameService = rservices.defineService("NameService", function() {
  return {
    name: function() {
      return name
    },
    setName: function(newName) {
      name = newName;
      NameService.update();
    }
  };
})

GreeterService = reservices.defineService("GreeterService", function(services) {
  return {
    subscribe: {
      name: "NameService#name"
    },
    greeting: function() {
      return "Hello " + services.name + "!"
    }
  }
})

Application = rservices.defineComponent({
  subscribe: {
    greeting: "GreeterService#greeting",
    setName: "NameService#setName"
  },
  setName: function(name) {
    this.state.setName(this.refs.name.getDOMNode().value)
  },
  render: function() {
    return <form>
      <h1>{this.state.greeting}</h1>
      <input ref="name" value="React + Services" onChange={this.setName} />
    </form>
  }
      
})

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Dependency injection and service layer for react.js

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