To Snake Case

Converts a string to snake casing. For example, 'hello world' becomes 'hello_world'.

javascript

function toSnakeCase(str) {
  return str
    .replace(/^[^A-Za-z0-9]*|[^A-Za-z0-9]*$/g, '')
    .replace(/([a-z])([A-Z])/g, (m, a, b) => a + '_' + b.toLowerCase())
    .replace(/[^A-Za-z0-9]+|_+/g, '_')
    .toLowerCase();
}

javascript

toSnakeCase("hello world"); // "hello_world"

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