Default picker

    let datepicker = new When({
        input: document.getElementById('...')
    });
            

Single date picker

    let datepicker = new When({
        input: document.getElementById('...'),
        singleDate: true
    });
            

Simple inline picker

    let datepicker = new When({
        container: document.getElementById('...'),
        inline: true
    });
            

Double picker demo

    let datepicker = new When({
        container: document.getElementById('...'),
        inline: true,
        double: true
    });
            

Picker with labels demo

    let datepicker = new When({
        container: document.getElementById('...'),
        inline: true,
        labelTo: '至',
        labelFrom: '从'
    });