Ext JS：无论浏览器时区如何，都以UTC显示日期

Question

What is the best way of forcing dates to display in UTC (and ignore the browser local time) in an Ext JS grid?

My model receives dates in UTC:

"2014-06-24T00:00:00+00:00"

My grid has a datecolumn:

Ext.define('MyApp.view.MyGrid', {
    store: MyApp.store.MyStore,
    columns: [
        {
            xtype: 'datecolumn',
            text: 'Date',
            dataIndex: 'date',
            format: 'Y-m-d H:i:sO'
        },
    ]
});

The dates are displayed in browser local time, eg:

2014-06-24 01:00:00+0100

But I want to display them in UTC.

So far, the best solution I have found is to import moment.js and use it thus:

{
    xtype: 'datecolumn',
    text: 'Date',
    dataIndex: 'date',
    renderer: function (value) {
        return moment.utc(value).format('YYYY-MM-DD HH:mm:ssZZ');
    }
}

Which has the desired result:

2014-06-24 00:00:00+0000

Surely there is a cleaner way?

Answer 1

I don't see UTC support built-in, so you can for example extend datecolumn and use moment to render date. Example:

Ext.define('Ext.grid.column.UtcDate', {
    extend: 'Ext.grid.column.Date',
    alias: ['widget.utcdatecolumn'],
    alternateClassName: 'Ext.grid.UtcDateColumn',

    defaultRenderer: function(value){
        return moment.utc(value).format(this.format);
    }
});

Then just use utcdatecolumn instead datecolumn :

Ext.define('MyApp.view.MyGrid', {
    store: MyApp.store.MyStore,
    columns: [
        {
            xtype: 'utcdatecolumn',
            text: 'Date',
            dataIndex: 'date',
            format: 'YYYY-MM-DD HH:mm:ssZZ'
        }
    ]
});

Answer 2

Its there in latest ExtJs. Make use of toUTCstring() or other toUTC xxxx() methods available.

alternatively, can do below:

// convert to msec
// add local time zone offset 
// get UTC time in msec

utc = d.getTime() + (d.getTimezoneOffset() * 60000);