this._isUTC}function Vt(){return!!this.isValid()&&this._isUTC}function jt(){return!!this.isValid()&&this._isUTC&&0===this._offset}function Nt(e,t){var n,s,i,r=e,o=null;return Dt(e)?r={ms:e._milliseconds,d:e._days,M:e._months}:a(e)?(r={},t?r[t]=e:r.milliseconds=e):(o=Ni.exec(e))?(n="-"===o[1]?-1:1,r={y:0,d:S(o[ii])*n,h:S(o[ri])*n,m:S(o[ai])*n,s:S(o[oi])*n,ms:S(Yt(1e3*o[ui]))*n}):(o=Ai.exec(e))?(n="-"===o[1]?-1:1,r={y:At(o[2],n),M:At(o[3],n),w:At(o[4],n),d:At(o[5],n),h:At(o[6],n),m:At(o[7],n),s:At(o[8],n)}):n