new Date()
to get the current date.Date.prototype.getDate()
and set the value to the result using Date.prototype.setDate()
.Date.prototype.toISOString()
to return a string in yyyy-mm-dd
format.const yesterday = () => { let d = new Date(); d.setDate(d.getDate() - 1); return d.toISOString().split('T')[0]; };
yesterday(); // 2018-10-17 (if current date is 2018-10-18)
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