Date picker not working Safari (Mac)

onInput(e) {
      const DATE_FORMAT = {
        null: new RegExp("^$"),
        full: new RegExp(
          "^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$"
        ),
        "month-year": new RegExp("^(0?[1-9]|1[012])(\/([0-9]{4})?)?$"),
        "year-only": new RegExp("^[0-9]{4}$")
      };
      let text = e || "";
      //console.log(text)
      const test = Object.entries(DATE_FORMAT).find(regexp => {
        this.catchType = regexp[1].test(text);
        //console.log(this.catchType)
        if (regexp[1].test(text)) {
          return regexp[0];
        } else {
          //console.log('s')
          this.dateError =
            "Date Must be Valid Format EX: (DD/MM/YYYY OR MM/YYYY OR YYYY)";
        }
      });
      if (test) {
        this.format = test[0];
        this.date = text;
        this.birthDate = text;
        this.dateAutoSlashes(e);
      }
      this.$forceUpdate();
    },
    dateAutoSlashes(e) {
      if (e.inputType === "deleteContentBackward") return;
      if (this.date.length === 2) {
        this.date = this.date + "/";
      }
      if (this.date.length === 5 && parseInt(this.date.substr(3)) <= 12) {
        this.date = this.date + "/";
      }
    },

if i enter 18/04/2009 safari show me 18 jan 2009

Any one know what is wrong?