Salesforce Lightning Show Toast JavaScript Helper Method

SalesforceLightningShowToastHelper.js

// Documentation: https://developer.salesforce.com/docs/component-library/bundle/force:showToast/specification
// type:  'error', 'warning', 'success', or 'info'

showToast : function(title, message, type, icon) { 
    var toastEvent = $A.get("e.force:showToast");
    toastEvent.setParams({
        title : title,
        message: message,
        duration: '2000',
        key: icon,
        type: type,
        mode: 'dismissible'
    });
    toastEvent.fire();
},