Although JavaScript has many uses, handling strings is one of the most popular. Let's take a closer look at how to manipulate strings using JavaScript. In JavaScript, a string is an object. String objects are not stored as character arrays, so we must use built-in functions to manipulate their values. These built-in functions provide different ways to access the contents of string variables. Let's take a closer look at these features.

all-inclusive

Manipulating the value of a string is a common occurrence that ordinary developers must face. There are many specific ways to manipulate strings, such as extracting a part of a string or determining whether a string contains specific characters. The following JavaScript functions provide developers with all the functions they need:

Concat ()–Combines two or more text characters and returns a new string.

Index of()- Returns the index of the first occurrence of a substring in a string. If it does not match,-1 is returned.

CharAT()- Returns the character at the specified position.

Lastindexoff f ()-Returns the index of the last occurrence of the substring in the string, or-1 if it does not match.

Match ()–Checks whether the string matches a regular expression.

Substring()- Returns the substring of the string. The parameters passed in are the start position and the end position.

Replace ()–Used to find a string that matches a regular expression, and then replace the matching string with a new string.

Search()- Perform a regular expression matching lookup. If the search is successful, the matching index value in the string is returned. Otherwise, return-1.

Slice()- Extract a part of a string and return a new string.

Split()- Converts a string into an array of strings by splitting it into substrings.

Length ()–Returns the length of a string, that is, the number of characters it contains.

ToLowerCase()- Converts the entire string to lowercase letters.

Toupper case()- Converts the entire string to uppercase letters.

Note: concat, match, replace and search functions have been added in JavaScript 1.2. All other functions are already provided in JavaScript 1.0.