Introduction
Environment Setup
What is JavaScript vs ES-5 or ES-6
JavaScript Syntax
JavaScript Comments
JavaScript Use Strict
JavaScript Variables
JavaScript Reserved Words
JavaScript Scope
JavaScript Data Types
JavaScript Function
Function overloading not possible in JavaScript
JavaScript Arrow Function
JavaScript Numbers
JavaScript Number Methods
JavaScript String
JavaScript String Methods
JavaScript if else and else if
JavaScript Comparison and Logical Operators
JavaScript Arrays
JavaScript Sorting Arrays
JavaScript Array Iteration Methods
JavaScript for loop
JavaScript Let keyword
JavaScript Const
JavaScript Objects
JavaScript Object Methods
JavaScript ES5 Object Methods
JavaScript Object Accessors
JavaScript Math Object
JavaScript Random
JavaScript this Keyword
JavaScript Date Objects and Date Formats
JavaScript Classes
JavaScript While Loop
JavaScript Break and Continue
JavaScript Switch Statement
JavaScript JSON
Error handling in JavaScript
JavaScript have many string methods for string modification or we can get many properties of the string using this string method. JavaScript string methods are very useful for programmer to get the many important property or specific value from the any string. Now given bellow some string function name:
• indexOf
• lastIndexOf
• length
• search
• slice
• replace
• toLowerCase
• toUpperCase
Now given bellow the string method code and explain the code:
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
var name = "Farhan Sakib Jesy!";
//get the index
console.log(name.indexOf("Sakib"));
console.log(name.lastIndexOf("Sakib"));
//get the length
console.log(name.length);
//returns the position of the first occurrence of a specified text in a string
console.log(name.search("Sakib"));
//get specific words from string
console.log(name.slice(0, 13));
//replace specific word
console.log(name.replace("Jesy", "...."))
//get Lower Case
console.log(name.toLowerCase())
//get Upper Case
console.log(name.toUpperCase())
</script>
</body>
</html>
In this code we have a variable name as “name”. This name variable contains the my “Farhan Sakib Jesy” string. This string modifies, replace, Upper case or Lower case etc perform by the string functions. We can easily write our code using this function. If we use this function our code will be more read abele and clean for the programmer.
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