Ember Pardon

About

This Ember mixin is a Get Out of Jail Free Card that injects a 'beforeDestroy' hook and 'pardon'/'unpardon' methods which allow for the halt or continuation of an object's destruction.

Installation

• npm install --save-dev ember-pardon

Usage

Ember Pardon can be used on any destroyable Ember.Object.

import Ember from 'ember';
import EmberPardon from 'ember-pardon';
 
Ember.View.reopen(EmberPardon);

Please Note: For Ember.View it is recommended to add globally, because of how Ember organizes and manages virtual parent views. It is definitely possible to add as a mixin only, but keep in mind that Ember will attempt to destroy the parent view first, before Ember Pardon has a chance to halt destruction.

Get Out of Jail Free

Ember Pardon gives your objects freedom once each cycle. It adds the following:

• beforeDestroy() Called before willDestroy. Overriding this function and calling this.pardon() will save the object from being destroyed, which includes being removed from the DOM in the case of a View.

• pardon() Retains the object from destruction during this one cycle.

• unpardon() Reverts the object to default behavior, allowing it to be destroyed.

• _isPardoned : Private

Private variable that tracks whether or not the object should be pardoned.

Complete Example

The following creates an example class that pardons the first time destroy is called, but will retain original behavior the second time around.

unpardon() only exists for those rare times that you want to cancel a previous pardon. PLEASE NOTE: Pardon and Unpardon are reset after each destroy cycle.

import Ember from 'ember';
import EmberPardon from 'ember-pardon';
 
Ember.View.reopen(EmberPardon);
 
var ExampleView = Ember.View.extend({
    shouldStickAround:true,
    beforeDestroy:function(){
        if (this.shouldStickAround){
            this.set('shouldStickAround', false);
            this.pardon();
            return;
        }
        
        /**
        unpardon used here doesn't really do anything
        because nothing was changed above.  Use this
        to cancel out previous calls to pardon().
        **/
        this.unpardon();
        
    }
});
export default ExampleView;

For more information on using ember-cli, visit http://www.ember-cli.com/.