important python package

All String Methods in Javascript

All string methods in JavaScript provides a variety of built-in methods for working with strings. Here’s a list of some commonly used string methods in JavaScript.

CharAt(index):

Returns the character at the specified index.

javascript

var str = “Hello”;

var char = str.charAt(1);

// Returns ‘e’

CharCodeAt String Methods in Javascript:

Returns the Unicode value of the character at the specified index All String Methods in Javascript.

javascript

var str = “Hello”;

var unicode = str.charCodeAt(1);

// Returns 101

Concat(str1, str2, …):

Combines two or more strings in javascript.

javascript

var str1 = “Hello world”;

var result = str1.concat;

// Returns ‘Hello World’.

IndexOf(searchValue, startIndex):

Returns the index of the first occurrence of a specified value in a string.

javascript

var str = “Hello World”;

var index = str.indexOf(“o”);

// Returns.

LastIndexOf(searchValue, startIndex):

Use the indexOf method to return the position of the first occurrence of specified character(s) in a string.

javascript

var str = “Hello World”;

var index = str.lastIndexOf(“o”);

// Returns 7

Slice(startIndex, endIndex):

Extracts a section of a string and returns a new string.

javascript

var str = “Hello World”;

var newStr = str.slice(6, 11);

// Returns ‘World’

Substring(startIndex, endIndex):

Extracts a specified number of characters from a string.

javascript

var str = “Hello World”;

var newStr = str.substring(6, 11);

// Returns ‘World’

Substring(length):

Extracts a specified number of characters from a string.

javascript

var str = “Hello World”;

var newStr = str.substr(6, 5);

// Returns ‘World’

ToLowerCase()String Methods in Javascript:

Converts all characters in a string to lowercase.

javascript

var str = “Hello World”;

var lowerStr = str.toLowerCase();

// Returns ‘hello world’

ToUpperCase():

Converts all characters in a string to uppercase.

javascript

var str = “Hello World”;

var upperStr = str.toUpperCase();

// Returns ‘HELLO WORLD’

trim()string Methods in Javascript:

Removes whitespace from both ends of a string in javascript.

javascript

var str = ” Hello World “;

var trimmedStr = str.trim();

// Returns ‘Hello World’

Replace(searchValue, replaceValue):

The replace Value parameter is the string that will replace the search Value.

javascript

var str = “Hello World”;

var newStr = str.replace(“World”, “Universe”);

// Returns ‘Hello Universe’.

These are some just of the commonly used in javascript and you can always refer to the official documentation for more details and examples.

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