recursively loop through object keys at root and output tree path from root to leaf

BinaryTree.js

let getPaths = (object) => {
    var result = [];
    // Can't pass null here
    if (object === null) {
        return;
    }
    // Creating local array
    if(!currentVal) {
        var currentVal = [];
    }
    for (var property in object) {
       	if (object.hasOwnProperty(property)) {
	    	if (typeof object[property] === 'object') {
	    	    currentVal.push(scrape(object[property], null, null));
			} else {
			   currentVal.push(object[property]);    
			}
		} 
	}
	return currentVal;
}

let scrape = (object, currentVal) => {
    // Can't pass null here
    if (object === null) {
        return;
    }
    // Creating local array
    if(!currentVal) {
        var currentVal = [];
    }
    // console.log(object)
    for (var property in object) {
		if (object.hasOwnProperty(property)) {
	    	if (typeof object[property] === 'object') {
				scrape(object[property], currentVal);
			} else if(object[property]) {
			    thisVal = object[property];
			    currentVal.push(object[property]);
			}  
		}
	}
	return currentVal;
}

var thisObject = {
	"l": {
		"l": {
			"l": {
				"l": null,
				"r": null,
				"x": 5
			},
			"r": null,
			"x": 4
		},
		"r": null,
		"x": 5
	},
	"r": {
		"l": {
			"l": null,
			"r": null,
			"x": 1
		},
		"r": {
			"l": null,
			"r": null,
			"x": 6
		},
		"x": 6
	},
	"x": 4
};
console.log(getPaths(thisObject));