startswith in javascript

To check if a string starts with a particular substring in JavaScript, you can use the startsWith() method. This method returns a boolean value true if the given string starts with the provided substring, otherwise false.

Here's an example of how to use startsWith():

index.tsx
const myString = 'Hello, world!';
const substring = 'Hello';

if (myString.startsWith(substring)) {
  console.log('The string starts with the substring!');
} else {
  console.log('The string does not start with the substring.');
}
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In this example, myString is the string we want to check, and substring is the substring we want to check for. We use startsWith() to test whether myString starts with substring. The code above prints The string starts with the substring! to the console, because myString does indeed start with substring.