JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="check"">&nbsp;<span id="rm">Remember me</span>

<span id="ok">Okay!</span>

CSS

input[type="checkbox"] {
    vertical-align:-10%;
}
#rm {
    font:14px century;
}
#ok {
    position:absolute;
    font:italic bold 14px century;
    color:green;
    margin-left:3px;
    margin-top:2px;
    display:inline-block;
    opacity:0;
}

JavaScript

$('#check').on('change',function(){
    if(this.checked)
        $("#ok").css("opacity", 1);
    else 
        $("#ok").css("opacity", 0);
});