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.

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