Преобразуем underscore_case в camelCase и в camel-Case-To-Dash

Сниппет underscore_case в camelCase

function underscoreToCamelCase(valueStr) {
  return (valueStr).replace(/_([a-z])/g, (m, w) => w.toUpperCase());
}

underscoreToCamelCase('some_text'); // "someText"

Сниппет camelCase в dash-case

function camelCaseToDash(str) {
  return str.replace(/([A-Z])/g, ($1) => {
    return '-' + $1.toLowerCase();
  });
}
// example
camelCaseToDash('someText'); // "some-text"