tweak

src/components/ScrollPane/index.vue

@@ -24,24 +24,26 @@ export default {
       const $container = this.$refs.scrollContainer.$el
       const $containerWidth = $container.offsetWidth
       const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap
-
       const tagList = this.$parent.$refs.tag
+
       let firstTag = null
       let lastTag = null
       let prevTag = null
       let nextTag = null
+
       // find first tag and last tag
       if (tagList.length > 0) {
         firstTag = tagList[0]
         lastTag = tagList[tagList.length - 1]
       }
+
       // find preTag and nextTag
       for (let i = 0; i < tagList.length; i++) {
         if (tagList[i] === currentTag) {
           if (i === 0) {
-            nextTag = tagList[i].length > 1 ? tagList[i + 1] : null
+            nextTag = tagList[i].length > 1 && tagList[i + 1]
           } else if (i === tagList.length - 1) {
-            prevTag = tagList[i].length > 1 ? tagList[i - 1] : null
+            prevTag = tagList[i].length > 1 && tagList[i - 1]
           } else {
             prevTag = tagList[i - 1]
             nextTag = tagList[i + 1]
@@ -53,17 +55,15 @@ export default {
       if (firstTag === currentTag) {
         $scrollWrapper.scrollLeft = 0
       } else if (lastTag === currentTag) {
-        $scrollWrapper.scrollLeft =
-          $scrollWrapper.scrollWidth - $containerWidth
+        $scrollWrapper.scrollLeft = $scrollWrapper.scrollWidth - $containerWidth
       } else {
         // the tag's offsetLeft after of nextTag
         const afterNextTagOffsetLeft = nextTag.$el.offsetLeft + nextTag.$el.offsetWidth + tagAndTagSpacing
+
         // the tag's offsetLeft before of prevTag
         const beforePrevTagOffsetLeft = prevTag.$el.offsetLeft - tagAndTagSpacing
-        if (
-          afterNextTagOffsetLeft >
-          $scrollWrapper.scrollLeft + $containerWidth
-        ) {
+
+        if (afterNextTagOffsetLeft > $scrollWrapper.scrollLeft + $containerWidth) {
           $scrollWrapper.scrollLeft = afterNextTagOffsetLeft - $containerWidth
         } else if (beforePrevTagOffsetLeft < $scrollWrapper.scrollLeft) {
           $scrollWrapper.scrollLeft = beforePrevTagOffsetLeft