How to combine json's in angular 8

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Angular8

Hello,
I have three json into array like and also i want array[0] with the first json including other jsons nonmatching key with blank value. Please provide me the solution in angular 8

json1 = {name: "Adhikar", email: "adhikar@gmail.com", phoneNumber: "(898) 990-9090", cropType: "rawCrop", cropName: {jawar: true, bajri: false}, cropPeriod: 120}

json2 = {name: "Sagar", email: "sagar@gmail.com", phoneNumber: "", cropType: "", phvalue: 90 }

json3 = {name: "Ajay", email: "ajay@gmail.com", phoneNumber: "", cropType: "rawCrop", cropWeather: "winter"}



so i want to update my array[0] Like this

json1 = {name: "Adhikar", email: "adhikar@gmail.com", phoneNumber: "(898) 990-9090", cropType: "rawCrop", cropName: {jawar: true, bajri: false}, cropPeriod: 120, phvalue:"", cropWeather: ""}

json2 = {name: "Sagar", email: "sagar@gmail.com", phoneNumber: "", cropType: "", phvalue: 90 }

json3 = {name: "Ajay", email: "ajay@gmail.com", phoneNumber: "", cropType: "rawCrop", cropWeather: "winter"}

What I have tried:

getDynamicFormData() {    
    this.dynamicFormResponseService.get(this.id).subscribe(
      res => {
        if (res && res != null) {
          this.dynamicFormData = res;
          const array = [];
          const ids = [];
          this.dynamicFormData.forEach(function (item) {
            if (array[0] == null) {
              array.push(JSON.parse(item.response));
            }
            else {
              var mainArray = JSON.stringify(array[0]);
              for (let key in JSON.parse(mainArray)) {               
                if (JSON.parse(mainArray).hasOwnProperty(key) == JSON.parse(item.response).hasOwnProperty(key)) {
                                  
                }
              }
              console.log(array);
              array.push(JSON.parse(item.response));
              ids.push(item.id);
            }
          });
          this.dynamicFormResponses = array;
          this.dynamicFormResponsesId = ids;
        }
      },
      error => {
        this.toastr.error(error.message);
      }
    );
  }