moment.js validating invalid date “2013-10-311”

Question

Running moment.js, 2.2.1

moment(\"2010-10-319\", [\"YYYY-MM-DD\"]).isValid()

... returns true, and the moment object would be

Answer 1

Moment.js version 2.3.0 added strict parsing.

moment("2010-10-319", ["YYYY-MM-DD"]).isValid();       // true
moment("2010-10-319", ["YYYY-MM-DD"], true).isValid(); // false

moment("2010-10-31a", ["YYYY-MM-DD"]).isValid();       // true
moment("2010-10-31a", ["YYYY-MM-DD"], true).isValid(); // false

var formats = ["MM/DD/YYYY", "MM-DD-YYYY", "YYYY-MM-DD"];

moment("2010-10-319",  formats).isValid(); // true
moment("2010-10-3199", formats).isValid(); // false

moment("2010-10-319",  formats, true).isValid(); // false
moment("2010-10-3199", formats, true).isValid(); // false

moment("2010-10-319qr", formats).isValid();       // true
moment("2010-10-319qr", formats, true).isValid(); // false