Angular2 Check if Location.back has history to go back?

So I have a button that calls, Location.back() i want to show it when it has history available, is it posible to check if location has any history, or can go back?

Or is there a way of accessing the history miself?

Angular Version: 2.2.3

HTML:

<div (click)="historyBack()">
<i class="fa fa-angle-left"></i>
</div>


component:

import {Location} from '@angular/common';

@Component(...)
export class HomeComponent{
hasHistory = false;
constructor(
private _location: Location
){
this.hasHistory = //Magic code
}
historyBack(){
this._location.back();
}
}

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