Useful JS functions: camelize and parameterize

main.js

// Converts 'foo-bar' to 'fooBar'
// Credits: https://stackoverflow.com/a/6661012
export function camelize(str) {
  return str.replace(/-([a-z])/g, g => g[1].toUpperCase());
}


// Converts 'fooBar' to 'foo-bar'
// Credits: https://gist.github.com/youssman/745578062609e8acac9f
export function parameterize(str) {
  return str.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
}

test.js

describe('camelize', () => {
  it('converts a hyphenated string to camelCase', () => {
    expect(camelize('foo')).to.eq('foo');
    expect(camelize('foo-bar')).to.eq('fooBar');
    expect(camelize('foo-bar-baz')).to.eq('fooBarBaz');
  });
});


describe('parameterize', () => {
  it('converts a camelCase string to hyphenated', () => {
    expect(parameterize('foo')).to.eq('foo');
    expect(parameterize('fooBar')).to.eq('foo-bar');
    expect(parameterize('fooBarBaz')).to.eq('foo-bar-baz');
  });
});