[Improvement] Stepper blur (#1316)

packages/stepper/index.vue

@@ -11,6 +11,7 @@
       :disabled="disabled || disableInput"
       @input="onInput"
       @keypress="onKeypress"
+      @blur="onBlur"
     >
     <button
       :class="b('plus', { disabled: plusDisabled })"
@@ -121,6 +122,14 @@ export default create({
       }
     },
 
+    onBlur(event) {
+      if (!this.value) {
+        this.currentValue = +this.min;
+        this.emitInput();
+      }
+      this.$emit('blur', event);
+    },
+
     emitInput() {
       this.$emit('input', this.currentValue);
       this.$emit('change', this.currentValue);