a simple NavTree Data Structure.

NavTree

/**

	A super simple tree structure to make building and
	traversing navigation trees stupid simple.

*/
class NavTree {

	constructor( label, children ){
		this.children = children || []
		this.props = {children: this.children, label: label || 'Accordion Menu'}
        this._isNavTree = true
        this._atChild = -1
	}

	mount(label, children){
		return new NavTree(label, children);
	}
  
    set(label, value){
      this.props[label] = value
    }
  
    get(label){
      return this.props[label]
    }

	getChildren(){
		return this.menu_children;
	}
  
    toString(){
      return JSON.stringify(this.props)
    }

	addChild( child ){
        if( ! child._isNavTree ) return false;
		this.children.push( child )
		return this.children
	}
    currentChild(){
      return this.children[this._atChild]
    }
	nextChild(){
        if( this._atChild >= this.children.length - 1 ) return false; // stop at end
        this._atChild++;
        let next = this.children[this._atChild];
        	next.visited ? next.visited++ : next.visited = 1;
		return next || false;
	}

	prevChild(){
        this._atChild--;
        if( this._atChild < 0 ) return this._atChild = -1, false
        let prev = this.children[this._atChild]
		return this.children[this._atChild] || false;
	}

}

// export const NavTree = NavTree