How do I set WebGLInput.captureAllKeyboardInput to false?

Unity Engine
,
1

I’m building my Unity project to WebGL and on the same page where the Unity container is loaded I have some HTML input fields. But because Unity is using all of the keyboard input I am not able to type in those fields. According to this: Unity - Scripting API: WebGLInput.captureAllKeyboardInput there is an option to set captureAllKeyboardInput to false. But how do I use this. If I create an empty game object with the following script is does not work.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DisableKeyboardInput : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        WebGLInput.captureAllKeyboardInput = false;
    }
}
2

I am now getting the follow error in my console:

MissingMethodException: Attempted to access a missing method.
DisableKeyboardInput.Start () (at Assets/Scripts/DisableKeyboardInput.cs:10)
3

Fixed it by replacing WebGLInput.captureAllKeyboardInput = false; with UnityEngine.WebGLInput.captureAllKeyboardInput = false;