JavaScript String Methods code

Here are some commonly used JavaScript string methods:

1. length: Returns the length of a string.

   const str = 'Hello, World!';
   console.log(str.length); // Output: 13​

2. toUpperCase(): Converts a string to uppercase.

   const str = 'Hello, World!';
   console.log(str.toUpperCase()); // Output: HELLO, WORLD!​

3. toLowerCase(): Converts a string to lowercase.

   const str = 'Hello, World!';
   console.log(str.toLowerCase()); // Output: hello, world!​

4. indexOf(): Returns the index of the first occurrence of a specified value in a string.

   const str = 'Hello, World!';
   console.log(str.indexOf('World')); // Output: 7​

5. slice(): Extracts a part of a string and returns a new string.

   const str = 'Hello, World!';
   console.log(str.slice(7)); // Output: World!
   console.log(str.slice(7, 12)); // Output: World​

6. replace(): Searches a string for a specified value, or a regular expression, and returns a new string where the specified values are replaced.

   const str = 'Hello, World!';
   console.log(str.replace('World', 'Universe')); // Output: Hello, Universe!​

7. split(): Splits a string into an array of substrings.

   const str = 'Hello, World!';
   console.log(str.split(',')); // Output: ['Hello', ' World!']​

8. trim(): Removes whitespace from both ends of a string.

   const str = '   Hello, World!   ';
   console.log(str.trim()); // Output: Hello, World!​

These are just a few of the many available JavaScript string methods.