滑块判断为空置0 --- fix1

src/components/app-slider/app-slider.vue

@@ -76,7 +76,7 @@ export default class AppSlider extends Vue {
      */
     @Watch('value')
     public onValueChange(newVal: any, oldVal: any) {
-        newVal = (Object.is(null, newVal)) ? 0 : newVal;
+        newVal = (newVal === null) ? 0 : newVal;
         this.currentVal = parseInt(newVal);
     }