JavaScript String Search

On 5 minutes, 12 seconds read By Edward

String Search In JavaScript

JavaScript comes with multiple built-in methods for searching strings.

JavaScript strings can also be searched using regular expressions. Abbreviated regex or regexp is a sequence of characters specifying a match pattern in text.

String search methods search for a specific string or regular expression within a string.

String Search Methods

Glossary:

Search

Text (substring) to search for.

Replace

Text or replace found matched text.

Regex

Uses search or match methods.

String Search Methods

Search Methods
Name Description Example
String.endsWith() Boolean check if ends with substring str.endsWith(“world”);
String.includes() Boolean check if substring exists str.includes(“world”);
String.indexOf() Position of first occurrence of substring str.indexOf(“world”);
String.lastIndexOf() Position of last occurrence of substring str.lastIndexOf(“world”);
String.match() Array containing the results of substring str.match(“world”);
String.match() Array containing the results of substring str.match(/world/);
String.search() Position of occurrence of substring str.search(“world”);
String.search() Position of occurrence of substring str.search(/world/);
String.startsWith() Boolean check if starts with substring str.startsWith(“Hello”);
Name Description Example

JavaScript String Search Snippet

// OjamboShop.com Learning JavaScript String Search Tutorial
let str = "Hello world";
console.log(str.endsWith("world")); // Boolean Ends With Method
console.log(str.includes("world")); // Boolean Includes Method
console.log(str.indexOf("world")); // Position IndexOf Method
console.log(str.lastIndexOf("world")); // Position lastIndexOf Method
console.log(str.match("world")); // Array Match Method
console.log(str.match(/world/)); // Array Regex Match Method
console.log(str.search("world")); // Array Search Method
console.log(str.search(/world/)); // Array Regex Search Method
console.log(str.startsWith("Hello")); // Boolean StartsWith Method

JavaScript String Search Code
OjamboShop.com Web IDE JavaScript String Search Code

JavaScript String Search Result
OjamboShop.com Web IDE Compiler Displaying JavaScript String Search Result


Usage

You can use any IDE or text editor and the web browser to compile and execute JavaScript code. For this tutorial, the OjamboShop.com Learning JavaScript Course Web IDE was used to input and compile JavaScript code for the string searches.

Open Source

JavaScript follows the ECMAScript standard and is licensed under the W3C Software License by web browser vendors and runtime environment vendors. This allows commercial use, modification, distribution, and allows making derivatives proprietary.

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Conclusion:

JavaScript makes it easy to search strings. Use one of several built-in string search methods to find a substring within a string.

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