Ternary Conditional Operator In TypeScript

Introduction

The ternary conditional operator(?) is not a statement but it creates conditional logic. It is used to assign a certain value to a variable based on a condition.

It will return the value on the left of the colon ( : ) if the expression is true, and return the value on the right of the colon if the expression is false.

TypeScript ternary operators take three operands.

Syntax

condition ? result1 : result2;

The following example shows how to use a ternary condition operator in TypeScript.

Step 1

Open Visual Studio 2012 and click "File" -> "New" -> "Project...". A window is opened. In this window, click HTML Application for TypeScript under Visual C#.

Provide the name of your application as "Ternary_Operator" and then click "Ok".

Step 2

After this session the project has been created; a new window is opened on the right side. This window is called the Solution Explorer. The Solution Explorer contains the ts file, js file, and CSS files.

Coding

ternary_operator.ts

class ternary_operator {
condition() {
var first = 5;
var second = 3;
var result = (first > second) ? "That is true : 5>3" : "That is false : 5<3";
alert(result);
}
}
window.onload = () => {
var obj = new ternary_operator();
obj.condition();
};

ternaryoperatot_Demo.htm

<!DOCTYPEhtml>
<html lang="en"
xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8"/>
<title>Ternary operator</title>
<link rel="stylesheet" href="app.css"type="text/css"/>
<script src="app.js"></script>
</head>
<body>
<h2>Ternary Condition Operator in TypeScript</h2>
<div id="content"/>
</body>
</html>

app.js

var ternary_operator = (function() {
function ternary_operator() {}
ternary_operator.prototype.condition = function() {
var first = 5;
var second = 3;
var result = (first > second) ? "That is true : 5>3" : "That is false : 5<3";
alert(result);
};
return ternary_operator;
})();
window.onload = function() {
var obj = new ternary_operator();
obj.condition();
};

Output

Referenced By

http://www.typescriptlang.org/