Convert a string in JavaScript to Pascal Case (removing non alphabetic characters).

string-to-pascal-case.js

/**
 * Convert a string to Pascal Case (removing non alphabetic characters).
 *
 * @example
 * 'hello_world'.toPascalCase() // Will return `HelloWorld`.
 * 'fOO BAR'.toPascalCase()     // Will return `FooBar`.
 *
 * @returns {string}
 *   The Pascal Cased string.
 */
String.prototype.toPascalCase = function() {
  const words = this.match(/[a-z]+/gi);
  if (!words) {
    return '';
  }
  return words
    .map(function (word) {
      return word.charAt(0).toUpperCase() + word.substr(1).toLowerCase();
    })
    .join('');
};

Ouch. Thanks @simonerlandsen

Nice work @jacks0n, thanks for sharing this helped me a great deal!

You should however check whether this.match(/[a-z]+/gi) might be null. Here is an enhanced version of the original code:

String.prototype.toPascalCase = function() {
    const words = this.match(/[a-z]+/gi);
    if (!words) return "";
    return words
        .map(function(word) {
            return word.charAt(0).toUpperCase() + word.substr(1).toLowerCase();
        })
        .join("");
};

And for anyone running typescript, here is a short global declaration for this ;):

declare global {
    interface String {
        toPascalCase(): string;
    }
}

you regexp trims out utf characters like şçı

@fullflash

try this. this regex will also match the extended Latin characters range.

String.prototype.toPascalCase = function() {
  const words = this.match(/[a-zA-Z\u00C0-\u024F\u1E00-\u1EFF]+/gi);
  if (!words) {
    return '';
  }
  return words
    .map(function (word) {
      return word.charAt(0).toUpperCase() + word.substr(1).toLowerCase();
    })
    .join('');
};