feat(search): add new event click-input (#4337)

* Update index.wxml

* Update index.js

* Update README.md

* Update README.md

lib/search/index.js

@@ -77,5 +77,8 @@ component_1.VantComponent({
     onClear: function (event) {
       this.$emit('clear', event.detail);
     },
+    onClickInput: function (event) {
+      this.$emit('click-input', event.detail);
+    },
   },
 });

lib/search/index.wxml

@@ -32,6 +32,7 @@
       bind:change="onChange"
       bind:confirm="onSearch"
       bind:clear="onClear"
+      bind:click-input="onClickInput"
     >
       <slot wx:if="{{ useLeftIconSlot }}" name="left-icon" slot="left-icon" />
       <slot wx:if="{{ useRightIconSlot }}" name="right-icon" slot="right-icon" />

packages/search/README.md

@@ -145,6 +145,7 @@ Page({
 | bind:focus  | 输入框聚焦时触发   | -                        |
 | bind:blur   | 输入框失焦时触发   | -                        |
 | bind:clear  | 点击清空控件时触发 | -                        |
+| bind:click-input | 点击搜索区域时触发 | -                   |
 
 ### Slot