lss-inject

To install use: bower install --save lss-inject

LIVE DEMO AND API

Senario:

---app-main
    --my-parent-component  <-- PROVIDER of user-manager.  user-manager lives in this component.
       -user-manager
       -component-a      
         -component-b
            -component-c
         -component-d
            -component-e
              -my-child-component   <-- needs access to user-manager becomes REQUESTER of user-manager
                -user-manager  
          -component-f
     --my-faq
     --my-feedback

How to use:

In this example we have a single instance component that is called user-manager that we would like to use in a child component nested deep in our app. Rather then binding the user-manager through the component tree in our app, we can simple provide and request the user-manager as seen below.

1. Provide your component in any parent component

class MyParentComponent extends LssProviderBehavior(Polymer.Element) {
  
    ready() {
        super.ready();    
        this.provideInstance("UserManager", this.$.userManager);
    }
}

2. Request your component from any child component

class MyChildComponent extends LssRequesterBehavior(Polymer.Element) {
    connectedCallback() {
         super.connectedCallback();
         var userManager = this.requestInstance("UserManager");
         userManager.ensureLoggedIn().
    }
}

Be both a requester and provider

class MyComponent extends LssProviderBehavior(LssRequesterBehavior(Polymer.Element)) {
   ready() {
        super.ready();    
        this.provideInstance("MyComponent", this);
   }
   
   connectedCallback() {
         super.connectedCallback();
         var userManager = this.requestInstance("UserManager");
         userManager.ensureLoggedIn().
   }
   
   onLogoutButtonClick(){
        var userManager = this.requestInstance("UserManager");
        if(userManager) 
            userManager.logout().
   }
}