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Create 0116-populating-next-right-pointers-in-each-node.js

Solved populating-next-right-pointers-in-each-node in JS.

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	`1`	`+/**`
	`2`	`+ * BFS`
	`3`	`+ * Time O(n) \| Space O(1)`
	`4`	`+ *`
	`5`	`+ * https://leetcode.com/problems/populating-next-right-pointers-in-each-node/`
	`6`	`+ * // Definition for a Node.`
	`7`	`+ * function Node(val, left, right, next) {`
	`8`	`+ * this.val = val === undefined ? null : val;`
	`9`	`+ * this.left = left === undefined ? null : left;`
	`10`	`+ * this.right = right === undefined ? null : right;`
	`11`	`+ * this.next = next === undefined ? null : next;`
	`12`	`+ * };`
	`13`	`+ */`
	`14`	`+/**`
	`15`	`+ *@param {Node} root`
	`16`	`+ *@return {Node}`
	`17`	`+ */`
	`18`	`+`
	`19`	`+varconnect=function(root){`
	`20`	`+`
	`21`	`+letcurrentNode=root;`
	`22`	`+letnextLevelNode=root&&root.left;`
	`23`	`+`
	`24`	`+while(currentNode&&nextLevelNode){`
	`25`	`+currentNode.left.next=currentNode.right;`
	`26`	`+if(currentNode.next){`
	`27`	`+currentNode.right.next=currentNode.next.left;`
	`28`	`+}`
	`29`	`+currentNode=currentNode.next;`
	`30`	`+if(!currentNode){`
	`31`	`+currentNode=nextLevelNode;`
	`32`	`+nextLevelNode=currentNode.left;`
	`33`	`+}`
	`34`	`+}`
	`35`	`+`
	`36`	`+returnroot;`
	`37`	`+};`

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