JSFiddle - React, Tailwind, and code Playground
HTML
<input id="foo1" data-someThing="bar">
<input id="foo2" data-something="bar">
<input id="foo3" data-some-thing="bar">
JavaScript
console.log('data-someThing: %s', $('#foo1').data('something'));
console.log('data-something: %s', $('#foo2').data('something'));
console.log('data-some-thing: %s', $('#foo3').data('someThing'));