aaac7fed
 liuqimichale
add
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"use strict";
var getMonth = Date.prototype.getMonth;
module.exports = function () {
switch (getMonth.call(this)) {
case 1:
return this.getFullYear() % 4 ? 28 : 29;
case 3:
case 5:
case 8:
case 10:
return 30;
default:
return 31;
}
};
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