Major_Project_A/Assets/Scripts/Browser/WebGLKeyboard.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using System.Runtime.InteropServices;
using System;

public class WebGLKeyboard : MonoBehaviour, ISelectHandler
{

    [DllImport("__Internal")]
    private static extern void focusHandleAction(string _name, string _str);

    private InputField UnityInput;
    private TMPro.TMP_InputField TMPInput;

    private void Awake()
    {
        UnityInput = GetComponent<InputField>();
        TMPInput = GetComponent<TMPro.TMP_InputField>();
    }

    public void ReceiveInputData(string value)
    {

        if (TMPInput != null)
            TMPInput.text = value;

        else if (UnityInput != null)
            UnityInput.text = value;


    }

    public void OnSelect(BaseEventData data)
    {
#if UNITY_WEBGL
        try
        {

            if (TMPInput != null)
                focusHandleAction(gameObject.name, TMPInput.text);
            else if (UnityInput != null)
                focusHandleAction(gameObject.name, UnityInput.text);

        }
        catch (Exception error) { }
#endif
    }
}