javascript convert /Date(1611856800000)/ code example
Example 1: javascript convert date to yyyy-mm-dd
// `date` is a `Date` object
const formatYmd = date => date.toISOString().slice(0, 10);
// Example
formatYmd(new Date()); // 2020-05-06
Example 2: js date format yyyy-mm-dd
yourDate.toISOString().split('T')[0]