JSFiddle - React, Tailwind, and code Playground
HTML
<div data-slider='{"sliderID": "slider1"}'></div>
<div data-slider='{"sliderID": "slider2"}'></div>
JavaScript
const sliders = document.querySelectorAll('[data-slider]')
sliders.forEach(slider => {
let getSliderData = slider.getAttribute('data-slider')
console.log(JSON.parse(getSliderData))
})