diff --git a/build.dev.js b/build.dev.js
index 9211c73..02cd33d 100644
--- a/build.dev.js
+++ b/build.dev.js
@@ -37,10 +37,10 @@ function fixImport(str) {
 }
 
 function compileJs(entry, output) {
-  log('编译JS: %s', chalk.green(entry))
-  let buf = fs.cat(entry).toString()
-  let code = fixImport(buf)
+  var buf = fs.cat(entry).toString()
+  var code = fixImport(buf)
 
+  log('编译JS: %s', chalk.green(entry))
   fs.echo(code, output)
 }
 
@@ -58,7 +58,7 @@ function mkWCFile({ style, html, js }) {
 
   let name = ''
 
-  js = js.replace(/props = (\{\}|\{[\w\W]*?\n\s{2}?\})/, function(str) {
+  js = js.replace(/props = (\{\}|\{[\w\W]*?\n\s{2}?\})/, function (str) {
     var attr = str
       .split(/\n+/)
       .slice(1, -1)
@@ -77,7 +77,7 @@ function mkWCFile({ style, html, js }) {
   })
 
   js = fixImport(js)
-    .replace(/export default class ([a-zA-Z0-9]+)/, function(s, m) {
+    .replace(/export default class ([a-zA-Z0-9]+)/, function (s, m) {
       name = m
       return `${s} extends HTMLElement `
     })
diff --git a/build.prod.js b/build.prod.js
index 220860c..1a9e9af 100644
--- a/build.prod.js
+++ b/build.prod.js
@@ -36,10 +36,12 @@ function fixImport(str) {
     )
 }
 
-const compileJs = (entry, output) => {
-  let t1 = Date.now()
-  let buf = fs.cat(entry).toString()
+function compileJs(entry, output) {
+  var t1 = Date.now()
+  var buf = fs.cat(entry).toString()
+
   buf = fixImport(buf)
+
   minify(buf, { sourceMap: false }).then(res => {
     log(
       '编译JS: %s, 耗时 %s ms',
@@ -65,19 +67,17 @@ function compileScss(code = '') {
 }
 
 function mkWCFile({ style, html, js }) {
+  let name = ''
   style = compileScss(style)
-
   html = html.replace(/[\n\r]+/g, ' ')
   html = html.replace(/\s+/g, ' ')
 
-  let name = ''
-
-  js = js.replace(/props = (\{\}|\{[\w\W]*?\n\s{2}?\})/, function(str) {
+  js = js.replace(/props = (\{\}|\{[\w\W]*?\n\s{2}?\})/, function (str) {
     var attr = str
       .split(/\n+/)
       .slice(1, -1)
       .map(it => {
-        var tmp = it.split(':')
+        let tmp = it.split(':')
         return tmp[0].trim().replace(/^['"]|['"]$/g, '')
       })
     return `
@@ -91,7 +91,7 @@ function mkWCFile({ style, html, js }) {
   })
 
   js = fixImport(js)
-    .replace(/export default class ([a-zA-Z0-9]+)/, function(s, m) {
+    .replace(/export default class ([a-zA-Z0-9]+)/, function (s, m) {
       name = m
       return `${s} extends HTMLElement `
     })
@@ -137,7 +137,7 @@ if(!customElements.get('wc-${parseName(name)}')){
 }
 
 const compileWC = (entry, output) => {
-  log('编译wc: %s', chalk.green(entry))
+  let t1 = Date.now()
   let code = fs.cat(entry).toString()
   let style = code.match(/<style[^>]*?>([\w\W]*?)<\/style>/)
   let html = code.match(/<template>([\w\W]*?)<\/template>/)
@@ -148,6 +148,11 @@ const compileWC = (entry, output) => {
   js = js ? js[1] : ''
 
   mkWCFile({ style, html, js }).then(txt => {
+    log(
+      '编译WC: %s, 耗时 %s ms',
+      chalk.green(entry),
+      chalk.yellow(Date.now() - t1)
+    )
     fs.echo(txt, output)
   })
 }
diff --git a/src/scroll/index.wc b/src/scroll/index.wc
index f46e04c..9196f87 100644
--- a/src/scroll/index.wc
+++ b/src/scroll/index.wc
@@ -308,7 +308,7 @@ export default class Scroll {
 
           fixedY = fixedY >> 0
 
-          if ((fixedY === 0 || height - yBar === fixedY) && fixedY === thumbY) {
+          if (fixedY === thumbY) {
             return
           }
 
@@ -329,7 +329,7 @@ export default class Scroll {
 
           fixedX = fixedX >> 0
 
-          if ((fixedX === 0 || width - xBar === fixedX) && fixedX === thumbX) {
+          if (fixedX === thumbX) {
             return
           }