In this article I will explain with an example, how to define and use HYPERLINK "https://www.aspsnippets.com/categories/Enum/" \t "_blank" Enum in
JavaScript.
HTML Markup
The HTML Markup consists of following element:
SELECT – For displaying color names.
The HTML SELECT element (DropDownList) has been assigned with a
JavaScript onchange event handler.
<select onchange="OnColourChange(this)">
<option value="0">Please select</option>
<option value="1">Red Color</option>
<option value="2">Green Color</option>
<option value="3">Blue Color</option>
</select>
Creating and using Enums in JavaScript
Inside the
OnColourChange JavaScript function, an Array is created.
Note: Here an Array of objects with Key Value Pairs is created which will be simulated as
Enum in
JavaScript.
Then, a SWITCH statement is executed and each case i.e. color is verified using CASE and appropriate message is displayed using
JavaScript Alert Message Box.
<script type="text/javascript">
function OnColourChange(d) {
var colors = { "Red": 1, "Green": 2, "Blue": 3 };
switch (parseInt(d.value)) {
case colors.Red:
alert("Red");
break;
case colors.Green:
alert("Green");
break;
case colors.Blue:
alert("Blue");
break;
}
}
</script>
Screenshot
![Enumeration in JavaScript: How to define and use Enum in JavaScript]()
Demo
Downloads
