When user provides value in the text area

It needs to filter out of the object based on ip-netmask and to check if the value exists in the object, if exists show to user that value already exists if not the show that it does not exist.

below is the method for search ** searchInExistingAddresses() {

        this.searchExistingAddress= Object.values(this.existingAddresses)
        return this.searchExistingAddress
       },**