The OOP language gives us the ability to customize objects and variable types.
Object Oriented Programming
JavaScript is an object-oriented programming language (OOP). The OOP language gives us the ability to define our own objects and variable types. Objects have properties and methods.
Property
Property refers to the value associated with an object.
Example:
Copy Code code as follows:
<script type= "Text/javascript" >
var txt= "Hello world!"
document.write (txt.length)//Use the Length property of the string object to calculate the number of characters in the string, output: 12
</script>
Method
Method refers to the behavior (or functionality that can be done) that an object can perform.
Copy Code code as follows:
<script type= "Text/javascript" >
var str= "Hello world!"
document.write (Str.touppercase ())//uses the toUpperCase () method of the string object to display the uppercase text. Output as: HELLO world!
</script>
