Filter a JSON array with a string search on any property: TypeScript

I have a Json object array which I am binding to a grid.

I want to filter the JSON array and return only those objects whose properties' values have a matching keyword as that of an input string.

This is my sample JSON

[{
      "TransactionID": "1",
      "MyProperty1": "some data 1",
      "MyProperty2": "28-02-2023",
      "MyProperty3": "some more data 1",
      "MyProperty4": "some other data 1",
      "documents": [
                      {"TransactionID": "1","MyProperty1":"Document 1","MyProperty2":"Completed"},
                      {"TransactionID": "1","MyProperty1":"Document 2","MyProperty2":"In Progress"},
                      {"TransactionID": "1","MyProperty1":"Document 3","MyProperty2":"In Progress"}
                   ]
    }, 
    {
      "TransactionID": "2",
      "MyProperty1": "some data 2",
      "MyProperty1": "27-02-2023",
      "MyProperty1": "some more data 2",
      "MyProperty1": "some other data 2",
      "documents":  [ 
                       {"TransactionID": "2","MyProperty1":"Document 1","MyProperty1":"Completed"},
                       {"TransactionID": "2","MyProperty1":"Document 2","MyProperty1":"Completed"}
                    ]
    }];

I have tried doing this, but throws this error 'Element implicitly has an 'any' type because expression of type 'string' can't be used to index type 'Object'

    doFilter(filterText: string) {
    
   let filteredObject = this.engagementData.filter(o =>
      Object.keys(o).some(k => o[k].toLowerCase().includes(filterText.toLowerCase())));
       
  }

Here my data has the above JSON.

Can someone suggest if there is something I am missing?

I am aware that looping through each property of each of the JSON Object is one of the options

but it will be helpful if there are any inbuilt functions which can retrieve all objects from JSON which has a specific string in any of the object's property

If your this.engagementData is of type object, then you can't call a string method on it, so you can't call .toLowerCase()on it, and that's what the error is telling you.

And if you are trying to filter objects which have a property matching your searched text then you should check on all values of that object:

let filteredObject = this.engagementData.filter(o =>
    Object.keys(o).some(k => Object.values(o[k]).some(val => val.toLowerCase().includes(filterText.toLowerCase())));

You need to call toLowerCase() and .includes() on each value of the o[k] object properties, instead of o[k].

Note:

This is the case for object types, if o[k] can be of type array or other types, you need to check over the type of o[k] and adapt the code for that.

I believe that your error is the same of this answer
https://stackoverflow.com/questions/57086672/element-implicitly-has-an-any-type-because-expression-of-type-string-cant-b

You need to specify the type of k