fix lint

packages/badge/src/badge.vue

@@ -5,6 +5,7 @@
       {{title}}
     </a>
 </template>
+
 <script>
 export default {
   name: 'zan-badge',
@@ -37,4 +38,4 @@ export default {
     }
   }
 };
-</script>
+</script>

packages/picker/src/picker.vue

@@ -66,8 +66,8 @@ export default {
 
   computed: {
     values() {
-      let columns = this.columns || [];
-      let values = [];
+      const columns = this.columns || [];
+      const values = [];
 
       columns.forEach(column => {
         values.push(column.value || column.values[column.defaultIndex || 0]);
@@ -89,7 +89,7 @@ export default {
      * 获取对应索引的列的实例
      */
     getColumn(index) {
-      let children = this.$children.filter(child => child.$options.name === 'zan-picker-column');
+      const children = this.$children.filter(child => child.$options.name === 'zan-picker-column');
       return children[index];
     },
 
@@ -97,7 +97,7 @@ export default {
      * 获取对应列中选中的值
      */
     getColumnValue(index) {
-      let column = this.getColumn(index);
+      const column = this.getColumn(index);
       return column && column.values[column.valueIndex];
     },
 
@@ -105,7 +105,7 @@ export default {
      * 设置对应列中选中的值
      */
     setColumnValue(index, value) {
-      let column = this.getColumn(index);
+      const column = this.getColumn(index);
       if (column) {
         column.currentValue = value;
       }
@@ -115,7 +115,7 @@ export default {
      * 获取对应列中所有的备选值
      */
     getColumnValues(index) {
-      let column = this.getColumn(index);
+      const column = this.getColumn(index);
       return column && column.currentValues;
     },
 
@@ -123,7 +123,7 @@ export default {
      * 设置对应列中所有的备选值
      */
     setColumnValues(index, values) {
-      let column = this.getColumn(index);
+      const column = this.getColumn(index);
       if (column) {
         column.currentValues = values;
       }

packages/steps/src/step.vue

@@ -21,8 +21,8 @@ export default {
 
   computed: {
     status() {
-      let index = this.$parent.steps.indexOf(this);
-      let active = this.$parent.active;
+      const index = this.$parent.steps.indexOf(this);
+      const active = this.$parent.active;
 
       if (index === -1) {
         return '';

packages/steps/src/steps.vue

@@ -34,8 +34,8 @@ export default {
 
   computed: {
     computedIconClass() {
-      let iconName = `zan-icon-${this.icon}`;
-      let result = this.iconClass.split(' ');
+      const iconName = `zan-icon-${this.icon}`;
+      const result = this.iconClass.split(' ');
       result.push(iconName);
 
       return result;

packages/switch/src/switch.vue

@@ -42,7 +42,7 @@ export default {
   },
   computed: {
     switchStates: function() {
-      let switchStates = ['zan-switch--' + (this.checked ? 'on' : 'off'),
+      const switchStates = ['zan-switch--' + (this.checked ? 'on' : 'off'),
         'zan-switch--' + (this.disabled ? 'disabled' : '')];
 
       return switchStates;