diff --git a/lib/pen.js b/lib/pen.js
index 0dec2e9..5c5bfde 100644
--- a/lib/pen.js
+++ b/lib/pen.js
@@ -143,16 +143,16 @@ export default class Painter {
   }
 
   _preProcess(view, notClip) {
-    let width=0;
+    let width = 0;
     let height;
     let extra;
     switch (view.type) {
       case 'text': {
         const textArray = view.text.split('\n');
-        //处理多个连续的'\n'
-        for(let i = 0; i < textArray.length ; ++i){
-          if(textArray[i]===''){
-            textArray[i]=' ';
+        // 处理多个连续的'\n'
+        for (let i = 0; i < textArray.length; ++i) {
+          if (textArray[i] === '') {
+            textArray[i] = ' ';
           }
         }
         const fontWeight = view.css.fontWeight === 'bold' ? 'bold' : 'normal';
@@ -160,9 +160,9 @@ export default class Painter {
         this.ctx.font = `normal ${fontWeight} ${view.css.fontSize.toPx()}px ${view.css.fontFamily ? view.css.fontFamily : 'sans-serif'}`;
         // this.ctx.setFontSize(view.css.fontSize.toPx());
         // 计算行数
-        let lines=0;
-        let linesArray=[];
-        for(let i=0; i<textArray.length; ++i){
+        let lines = 0;
+        const linesArray = [];
+        for (let i = 0; i < textArray.length; ++i) {
           const textLength = this.ctx.measureText(textArray[i]).width;
           const partWidth = view.css.width ? view.css.width.toPx() : textLength;
           const calLines = Math.ceil(textLength / partWidth);
@@ -363,24 +363,24 @@ export default class Painter {
       lines,
       lineHeight,
       textArray,
-      linesArray
+      linesArray,
     } = extra;
     // 如果设置了id，则保留 text 的长度
     if (view.id) {
       let textWidth = 0;
-      for(let i = 0; i < textArray.length; ++i){
+      for (let i = 0; i < textArray.length; ++i) {
         textWidth = this.ctx.measureText(textArray[i]).width > textWidth ? this.ctx.measureText(textArray[i]).width : textWidth;
       }
       this.globalTextWidth[view.id] = width ? (textWidth < width ? textWidth : width) : textWidth;
     }
-    let lineIndex=0;
-    for(let j = 0; j < textArray.length; ++j){
+    let lineIndex = 0;
+    for (let j = 0; j < textArray.length; ++j) {
       const preLineLength = Math.round(textArray[j].length / linesArray[j]);
       let start = 0;
       let alreadyCount = 0;
       for (let i = 0; i < linesArray[j]; ++i) {
-        //绘制行数大于最大行数，则直接跳出循环
-        if(lineIndex >= lines){
+        // 绘制行数大于最大行数，则直接跳出循环
+        if (lineIndex >= lines) {
           break;
         }
         alreadyCount = preLineLength;
@@ -402,7 +402,7 @@ export default class Painter {
         }
         start += text.length;
         // 如果是最后一行了，发现还有未绘制完的内容，则加...
-        if (lineIndex === lines - 1 && (j < textArray.length -1 || start < textArray[j].length)) {
+        if (lineIndex === lines - 1 && (j < textArray.length - 1 || start < textArray[j].length)) {
           while (this.ctx.measureText(`${text}...`).width > width) {
             if (text.length <= 1) {
               // 如果只有一个字符时，直接跳出循环