Angular 2 Forms – Custom Validators

In this article we are not discussing how to develop forms in Angular 2, we are going to discuss how to write a custom validator for Angular 2 forms. Forms API in Angular 2 has some built-in validators already, here is an model driven form example with built-in required validator.

ByShravan Kumar KasagoniFeb 18, 20162Comments

JAVASCRIPT

How to Use UnderscoreJS Templates

I am using Underscore.js from long time, it’s a JavaScript library that provides useful functional programming helpers without extending any built-in objects. I recently came across it’s templating capabilities. Underscore provides _.template() function to dynamically build markup from a template and some data(JavaScript objects). Here is the syntax: _.template(templateString, [settings]) _.template() compiles JavaScript templates into functions…

ByShravan Kumar KasagoniOct 8, 20150Comments

HTML 5 JAVASCRIPT

Get Image Data URL using JavaScript

It is very simple with HTML5 Canvas API, it provides toDataURL() method. The toDataURL() method of the canvas object converts the canvas drawing into a 64 bit encoded PNG URL. We can pass “image/jpeg” as argument to toDataURL() method, to get image data URL in the jpeg format. Here is the code snippet which explains…

ByShravan Kumar KasagoniMar 12, 20140Comments

JAVASCRIPT

Consuming a RESTful Web Service with AngularJS Using $http Service

The $http service is a core angular service that helps in consuming web services (either REST or SOAP) via the browser’s XMLHttpRequest object or via JSONP . $http service is similar to jQuery $.ajax() method. Here is the syntax of $http service : The $http service is a function which takes a single argument that…

ByShravan Kumar KasagoniJan 17, 20142Comments

JAVASCRIPT

“Controller as” Syntax in AngularJS 1.2

I was working with AngularJS from couple months. I came across some new features in AngularJS 1.2. I am going blog about this new features. AngularJS 1.2 introduces new “controller as” syntax. This syntax helps us to abstracts the use of $scope in controllers, simplifying the syntax of controllers, html markup. Let’s have a look…

ByShravan Kumar KasagoniJan 4, 20140Comments