JSFiddle - React, Tailwind, and code Playground
HTML
<input type="checkbox" class="checkbox" id="checkbox" value="chckbox1" checked="true"> checkbox1
<input type="text" id="input-1" value="input-1">
<input type="text" id="input-2" value="input-2" >
JavaScript
$w.onReady(function (){
$w('#checkbox').onChange((event)=> {
if (event.target.checked) {
$w('#input-1').show();
} else {
$w('#input-2').hide();
}
});
});