如何更改 bootstrap 日期范围选择器的标签?

How to change the label of bootstrap daterange picker?

我需要通过选择默认范围作为过去 7 天来更改日期范围选择器标签...谢谢

<div id="reportrange" class="pull-right" style="background: #fff; cursor: pointer; padding: 5px 10px; border: 1px solid #ccc; width: 100%">
    <i class="glyphicon glyphicon-calendar fa fa-calendar"></i>&nbsp;
    <span></span> <b class="caret"></b>
</div>

<script type="text/javascript">
$(function() {

    var start = moment().subtract(6, 'days');
    var end = moment();

    function cb(start, end) {
        $('#reportrange span').html(start.format('MMMM D, YYYY') + ' - ' + end.format('MMMM D, YYYY'));
    }

    $('#reportrange').daterangepicker({
        startDate: start,
        endDate: end,
        ranges: {
           'Today': [moment(), moment()],
           'Yesterday': [moment().subtract(1, 'days'), moment().subtract(1, 'days')],
           'Last 7 Days': [moment().subtract(6, 'days'), moment()],
           'Last 30 Days': [moment().subtract(29, 'days'), moment()],
           'This Month': [moment().startOf('month'), moment().endOf('month')],
           'Last Month': [moment().subtract(1, 'month').startOf('month'), moment().subtract(1, 'month').endOf('month')]
        }
    }, cb);

    cb(start, end);

});
</script>