Chrome v88 (88.0.4324.93) for Android does not recognize date

Device: Android phone (with Android v10) Browser: Chrome v88 (88.0.4324.93).

dayJs(‘2021-01-26T00:00:00Z’).tz(tz) returns “Invalid Date”. Started happening with Chrome upgrade v88.

dayJs(dateWithFormat).tz(tz) --> Works everywhere except Chrome88 on Android 10 dayJs.tz(dateWithFormat, tz) --> Works on Chrome 88 for Android 10.

Shouldn’t these methods return the same values irrespective of the browser or the underlying OS?

[janousek]

I wrote this polyfill to fix this issue. It is really ugly, but it should work.

// Chrome toLocaleString bug
(() => {
    let testDate = new Date(2021, 0, 17, 20, 16, 51);
    if (Intl?.DateTimeFormat != null) {
        let str = testDate.toLocaleString('en-US');
        if (str.indexOf('PM') == -1 || Number.isNaN(new Date(str).valueOf())) {
            if (new Intl.DateTimeFormat('cs-CZ').formatToParts != null) {


                let original = Date.prototype.toLocaleString;
                Date.prototype.toLocaleString = function (locale, opts) {
                    if (locale != 'en-US' || opts == null || Object.keys(opts).length != 1) {
                        return original.call(this, locale, opts);
                    }

                    let format = new Intl.DateTimeFormat('cs-CZ', {
                        year: 'numeric',
                        month: 'numeric',
                        day: 'numeric',
                        hour: 'numeric',
                        minute: 'numeric',
                        second: 'numeric',
                        hour12: false,
                        timeZone: opts.timeZone
                    });
                    let parts = format.formatToParts(this);
                    let component = (type) => {
                        return parseInt(parts.filter(x => x.type == type)[0].value, 10);
                    };
                    return new Date(component('year'), component('month') - 1, component('day'), component('hour'), component('minute'), component('second')).toISOString();
                };
            }
        }
    }
})();

Notice: This code is only usable if you do not use “toLocaleString” anywhere, except dayjs. It just fix dayjs, but can break other code (if it use toLocaleString method).

[romanlex]

Looks like chrome started to ignore locale in arguments ECMA-402