fixed #718

src/components/cascader/caspanel.vue

@@ -56,7 +56,7 @@
             handleTriggerItem (item, fromInit = false) {
                 if (item.disabled) return;
 
-                // return value back recursion
+                // return value back recursion  // 向上递归，设置临时选中值（并非真实选中）
                 const backItem = this.getBaseItem(item);
                 this.tmpItem = backItem;
                 this.emitUpdate([backItem]);

src/components/select/select.vue

@@ -493,7 +493,7 @@
                 this.query = query;
             },
             modelToQuery() {
-                if (!this.multiple && this.filterable && this.model) {
+                if (!this.multiple && this.filterable && this.model !== undefined) {
                     this.findChild((child) => {
                         if (this.model === child.value) {
                             if (child.label) {
@@ -518,6 +518,9 @@
         },
         mounted () {
             this.modelToQuery();
+            this.$nextTick(() => {
+                this.broadcastQuery('');
+            });
 
             this.updateOptions(true);
             document.addEventListener('keydown', this.handleKeydown);