diff --git a/src/svg.js b/src/svg.js
index a36ba8d..29df646 100644
--- a/src/svg.js
+++ b/src/svg.js
@@ -1,16 +1,9 @@
-// Copyright (c) 2013 - 2017 Adobe Systems Incorporated. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/**
+ * {}
+ * @author yutent<yutent.io@gmail.com>
+ * @date 2024/03/08 10:59:09
+ */
+
 import eve from './eve.js'
 
 import {
@@ -102,28 +95,14 @@ export class Fragment {
   }
 }
 
-/*\
- **
- * Creates a drawing surface or wraps existing SVG element.
- **
- - width (number|string) width of surface
- - height (number|string) height of surface
- * or
- - DOM (SVGElement) element to be wrapped into Snap structure
- * or
- - array (array) array of elements (will return set of elements)
- * or
- - query (string) CSS query selector
- = (object) @SnapElement
-\*/
 export class Snap {
   static _ = { $ }
 
-  /*\
- **
- * Parses SVG fragment and converts it into a @Fragment
- **
-\*/
+  /*
+   **
+   * Parses SVG fragment and converts it into a @Fragment
+   **
+   */
   static parse(svg) {
     let f = doc.createDocumentFragment(),
       full = true,
@@ -285,7 +264,7 @@ export class Snap {
     return value
   }
 
-  /*\
+  /*
  **
  * Returns you topmost element under given point.
  **
@@ -294,11 +273,9 @@ export class Snap {
  - y (number) y coordinate from the top left corner of the window
  > Usage
  | Snap.getElementByPoint(mouseX, mouseY).attr({stroke: "#f00"});
-\*/
+*/
   static getElementByPoint(x, y) {
-    let paper = this,
-      svg = paper.canvas,
-      target = doc.elementFromPoint(x, y)
+    let target = doc.elementFromPoint(x, y)
 
     if (!target) {
       return null
@@ -963,7 +940,7 @@ export class Paper {
     return this.el('polygon', attr)
   }
 
-  /*\
+  /*
  **
  * Creates an element on paper with a given name and no attributes
  **
@@ -983,31 +960,31 @@ export class Paper {
  |     cy: 10,
  |     r: 10
  | });
-\*/
+*/
   el(name, attr) {
     let el = make(name, this.node)
     attr && el.attr(attr)
     return el
   }
 
-  /*\
-     *
-     * Draws a rectangle
-     **
-     - x (number) x coordinate of the top left corner
-     - y (number) y coordinate of the top left corner
-     - width (number) width
-     - height (number) height
-     - rx (number) #optional horizontal radius for rounded corners, default is 0
-     - ry (number) #optional vertical radius for rounded corners, default is rx or 0
-     = (object) the `rect` element
-     **
-     > Usage
-     | // regular rectangle
-     | let c = paper.rect(10, 10, 50, 50);
-     | // rectangle with rounded corners
-     | let c = paper.rect(40, 40, 50, 50, 10);
-    \*/
+  /*
+    *
+    * Draws a rectangle
+    **
+    - x (number) x coordinate of the top left corner
+    - y (number) y coordinate of the top left corner
+    - width (number) width
+    - height (number) height
+    - rx (number) #optional horizontal radius for rounded corners, default is 0
+    - ry (number) #optional vertical radius for rounded corners, default is rx or 0
+    = (object) the `rect` element
+    **
+    > Usage
+    | // regular rectangle
+    | let c = paper.rect(10, 10, 50, 50);
+    | // rectangle with rounded corners
+    | let c = paper.rect(40, 40, 50, 50, 10);
+  */
   rect(x, y, w, h, rx, ry) {
     let attr
     if (ry == null) {
@@ -1150,19 +1127,19 @@ export class Paper {
     return el
   }
 
-  /*\
-     **
-     * Creates a `<filter>` element
-     **
-     - filstr (string) SVG fragment of filter provided as a string
-     = (object) @SnapElement
-     * Note: It is recommended to use filters embedded into the page inside an empty SVG element.
-     > Usage
-     | let f = paper.filter('<feGaussianBlur stdDeviation="2"/>'),
-     |     c = paper.circle(10, 10, 10).attr({
-     |         filter: f
-     |     });
-    \*/
+  /*
+    **
+    * Creates a `<filter>` element
+    **
+    - filstr (string) SVG fragment of filter provided as a string
+    = (object) @SnapElement
+    * Note: It is recommended to use filters embedded into the page inside an empty SVG element.
+    > Usage
+    | let f = paper.filter('<feGaussianBlur stdDeviation="2"/>'),
+    |     c = paper.circle(10, 10, 10).attr({
+    |         filter: f
+    |     });
+  */
   filter(filstr) {
     let paper = this
     if (paper.type !== 'svg') {
diff --git a/src/utils.js b/src/utils.js
index 470b6a2..b2b32f6 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -103,7 +103,7 @@ function repush(arr, item) {
   let l = arr.length - 1 // 要减1, 最后如果本身在最后, 不用变
   for (let i = 0; i < l; i++) {
     if (arr[i] === item) {
-      ;[a[i], a[l]] = [a[l], a[i]]
+      ;[arr[i], arr[l]] = [arr[l], arr[i]]
       break
     }
   }