Fomrat the JS and TS codes with prettier.

codes/javascript/modules/ListNode.js

@@ -11,8 +11,8 @@ class ListNode {
     val;
     next;
     constructor(val, next) {
-        this.val = (val === undefined ? 0 : val);
-        this.next = (next === undefined ? null : next);
+        this.val = val === undefined ? 0 : val;
+        this.next = next === undefined ? null : next;
     }
 }
 
@@ -47,5 +47,5 @@ function getListNode(head, val) {
 module.exports = {
     ListNode,
     arrToLinkedList,
-    getListNode
+    getListNode,
 };

codes/javascript/modules/PrintUtil.js

@@ -4,7 +4,7 @@
  * Author: IsChristina (christinaxia77@foxmail.com)
  */
 
-const { arrToTree } = require("./TreeNode");
+const { arrToTree } = require('./TreeNode');
 
 /**
  * Print a linked list
@@ -16,7 +16,7 @@ function printLinkedList(head) {
         list.push(head.val.toString());
         head = head.next;
     }
-    console.log(list.join(" -> "));
+    console.log(list.join(' -> '));
 }
 
 function Trunk(prev, str) {
@@ -45,28 +45,28 @@ function printTree(root, prev, isLeft) {
         return;
     }
 
-    let prev_str = "    ";
+    let prev_str = '    ';
     let trunk = new Trunk(prev, prev_str);
 
     printTree(root.right, trunk, true);
 
     if (!prev) {
-        trunk.str = "———";
+        trunk.str = '———';
     } else if (isLeft) {
-        trunk.str = "/———";
-        prev_str = "   |";
+        trunk.str = '/———';
+        prev_str = '   |';
     } else {
-        trunk.str = "\\———";
+        trunk.str = '\\———';
         prev.str = prev_str;
     }
 
     showTrunks(trunk);
-    console.log(" " + root.val);
+    console.log(' ' + root.val);
 
     if (prev) {
         prev.str = prev_str;
     }
-    trunk.str = "   |";
+    trunk.str = '   |';
 
     printTree(root.left, trunk, false);
 }
@@ -89,14 +89,14 @@ function showTrunks(p) {
  * @param arr
  */
 function printHeap(arr) {
-    console.log("堆的数组表示：");
+    console.log('堆的数组表示：');
     console.log(arr);
-    console.log("堆的树状表示：");
+    console.log('堆的树状表示：');
     printTree(arrToTree(arr));
 }
 
 module.exports = {
     printLinkedList,
     printTree,
-    printHeap
+    printHeap,
 };

codes/javascript/modules/TreeNode.js

@@ -50,5 +50,5 @@ function arrToTree(arr) {
 
 module.exports = {
     TreeNode,
-    arrToTree
+    arrToTree,
 };

codes/javascript/modules/Vertex.js

@@ -4,7 +4,6 @@
  * Author: Zhuo Qinyue (1403450829@qq.com)
  */
 
-
 /* 顶点类 */
 class Vertex {
     val;
@@ -32,5 +31,5 @@ class Vertex {
 }
 
 module.exports = {
-    Vertex
+    Vertex,
 };