console.log(<HTMLElement>document.querySelector('.context-menu')); this gives "null".

### Issue type

**I'm submitting a ...** (check one with "x")

* [ ] bug report
* [ ] feature request
* [ ] question about the decisions made in the repository

### Issue description

**Current behavior:**
console.log(document.querySelector('.context-menu')); this gives "null".

**Expected behavior:**
I want to do a style to nb-context-menu after clicking on user profile picture of nb-user.
what is the click function inside the ` `?
**Steps to reproduce:**

**Related code:**

```

userMenu = [
{
title: "Profile"
},
{
title: "Change Theme",
children: [
{
title: "Light",
},
{
title: "Dark",
},
{
title: "Cosmic",
},
],
},
{ title: "Log out" },
];

```

**Angular, Nebular**