Doesn't work with binding

[gusdecool]

<paper-date-picker date="[[ date ]]"></paper-date-picker>

for example date is binding and the value is 2016-12-01
it will give error:

Invalid date: undefined
paper-calendar.html:617 Invalid date: 2016-12-01

repeated like ~1.000 times

[web-padawan]

I can reproduce this. My current workaround is using two properties (via wrapper component), one for outer change (called date), other for inner (called value):

properties: {
    date: {
        type: String,
        notify: true,
        observer: '_onDateChanged'
    },
    value: {
        type: String
    }
},
_onDateChanged: function (date) {
    // when date is set from <paper-input>, update datepicker
    var input = Date.parse(date);
    if (!isNaN(input)) {
        // not a NaN means a valid date string
        var upd = new Date(input);
        // <paper-date-picker> resets hours, so we need to do the same
        // https://github.com/bendavis78/paper-date-picker/issues/50        
        upd.setHours(0);
        // only update value if it has changed
        if (this.value !== upd) {
            this.value = upd;
        }
    }
},

Not sure, but it's likely that Date.parse() could be called by this component itself here.

@bendavis78 WDYT?

[diegocerdan]

I have the same problem and can't bind date, min-date or max-date.

Strangely enough the example from README.md reads:
<paper-date-picker id="picker" date="[[date]]"></paper-date-picker>

So the binding is supposed to work.

[admwx7]

I'm not having this issue, but if you can recreate the problem using something like JSFiddle @diegocerdan I might be able to fix it for you.