JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<input type="text" class="calendar" />

JavaScript

var sd = new Date();
for(var i = 0; i < 7; i++) {
    if(dateFunc(sd)[0]) break;
    sd.setDate(sd.getDate() + 1);
}
$('.calendar').datepicker({ 
    beforeShowDay: dateFunc,
    defaultDate: sd
});
function dateFunc(date) {
        var day = new Date().getDay();
        return [date.getDay() != day];
}