I want to Mouse cursor hide in WebGL

Hello,

First, my English is very bad really sorry.

my question.

my project is WebGL.

I want to hide my mouse cursor while dragging the mouse.

so my script add code : Cursor.visible = false;

this code work succeeded in Unity Editor.

but does not work in WebGL index.html.

Can not use in WebGL?

I look forward to your reply.

Thanks.