How can I determine if a string begins with another string in JavaScript

Question

Can you tell me How can I determine if a string begins with another string in JavaScript? I am facing this issue since I have started building a project.

Answer 1

You can use the startsWith() method.

Syntax:

string.startsWith(searchString, position)

Example:

const str = "Hello, world!";

console.log(str.startsWith("Hello")); // Output: true

console.log(str.startsWith("world")); // Output: false

console.log(str.startsWith("world", 7)); // Output: true

In the example above, str.startsWith("Hello") returns true because the string str begins with "Hello". The method is case-sensitive, so str.startsWith("hello") would return false. Additionally, str.startsWith("world", 7) returns true because, starting from position 7, the string begins with "world".