recursion-ng-forms's Introduction

RecursionForms

Demo: https://yiqu.github.io/recursion-ng-forms/

Form Structure:

Address (form control)
Year (form control)
Habitant (form group)
- habitantName (form control)
- age (form control)
- dependents (form array)
  - The dependents array contains form groups that has a 'dependent_type' form control. The 'dependent_type' is a selection of 3 possible values: deceased, pet, or habitant. If habitant is chosen, display the Habitant form group again explained here.

The dependents form array could contain a Habitant, which in turn contains dependents which could contain Habitants. Thus a recursion is needed for creating and displaying the form.

Example result:

{
   "address":"1000 Friendly St.",
   "year":"2021",
   "habitant":{
      "habitantName":"Fist hab name",
      "age":"First hab age",
      "dependents":[
         {
            "dependent_type":"animal",
            "petName":"First hab's animal name"
         },
         {
            "dependent_type":"habitant",
            "habitant":{
               "habitantName":"Second hab name",
               "age":"Second hab age",
               "dependents":[
                  {
                     "dependent_type":"habitant",
                     "habitant":{
                        "habitantName":"Third hab name",
                        "age":"Third hab age",
                        "dependents":[
                           {
                              "dependent_type":"deceased"
                           },
                           {
                              "dependent_type":"habitant",
                              "habitant":{
                                 "habitantName":"Fourth hab name",
                                 "age":"Fourth hab age",
                                 "dependents":[
                                    {
                                       "dependent_type":null
                                    }
                                 ]
                              }
                           }
                        ]
                     }
                  }
               ]
            }
         }
      ]
   }
}

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