feat: add switch onswitch-icon and unswitch-icon slot

src/component/switch/index.less

@@ -14,7 +14,7 @@
   transition: 0.1s linear;
 }
 
-.layui-form-switch i {
+.layui-form-switch span {
   position: absolute;
   left: 5px;
   top: 3px;
@@ -43,7 +43,7 @@
   background-color: @global-checked-color;
 }
 
-.layui-form-onswitch i {
+.layui-form-onswitch span {
   left: 100%;
   margin-left: -21px;
   background-color: #fff;

src/component/switch/index.vue

@@ -51,7 +51,12 @@ const handleClick = function () {
       }"
     >
       <em>{{ isActive == true ? activeText : inactiveText }}</em>
-      <i></i>
+      <span>
+        <div>
+        <slot v-if="isActive" name="onswitch-icon"></slot>
+        <slot v-else name="unswitch-icon"></slot>
+        </div>
+      </span>
     </div>
   </span>
 </template>