type of in node js code example

Example 1: js node type

//The read-only Node.nodeType property is an integer that identifies what the node is. It distinguishes different kind of nodes from each other, such as elements, text and comments.

var x = document.getElementById("ElementID").nodeType;

//Returns an integer which specifies the type of the node
/*
Example
1.  Element
2.  Attribute
3.  Text
4.  CDATASection
5.  EntityReference
6.  Entity
7.  ProcessingInstruction
8.  Comment
9.  Document
10. DocumentType
11. DocumentFragment
12. Notation 
*/

Example 2: check data type in javascript

typeof("string"); //string
typeof(123); //number

Example 3: javascript check type of variable var

// You can use the built-in method 'typeof' in order to check the variable datatype

//examples:

typeof "hello" // "string"

//or
var a = 1;
typeof(a);
//the output will be > 'number'

Example 4: how to get type of variable in javascript

> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"

Example 5: javascript check type of variable var

> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"