Merge branch 'dev' into next

src/field/README.md

@@ -271,7 +271,7 @@ Field support all native events of input tag
 
 ### Methods
 
-Use [ref](https://vuejs.org/v2/api/#ref) to get Field instance and call instance methods
+Use [ref](https://vuejs.org/v2/api/#ref) to get Field instance and call instance methods.
 
 | Name  | Description         | Attribute | Return value |
 | ----- | ------------------- | --------- | ------------ |

src/field/README.zh-CN.md

@@ -294,7 +294,7 @@ export default {
 
 ### 方法
 
-通过 ref 可以获取到 Field 实例并调用实例方法，详见[组件实例方法](#/zh-CN/quickstart#zu-jian-shi-li-fang-fa)
+通过 ref 可以获取到 Field 实例并调用实例方法，详见[组件实例方法](#/zh-CN/quickstart#zu-jian-shi-li-fang-fa)。
 
 | 方法名 | 说明           | 参数 | 返回值 |
 | ------ | -------------- | ---- | ------ |

src/field/index.js

@@ -240,10 +240,15 @@ export default createComponent({
     const updateValue = (value, trigger = 'onChange') => {
       value = isDef(value) ? String(value) : '';
 
-      // native maxlength not work when type is number
-      const { maxlength } = props;
+      // native maxlength have incorrect line-break counting
+      // see: https://github.com/youzan/vant/issues/5033
+      const { maxlength, modelValue } = props;
       if (isDef(maxlength) && value.length > maxlength) {
-        value = value.slice(0, maxlength);
+        if (modelValue && modelValue.length === +maxlength) {
+          value = modelValue;
+        } else {
+          value = value.slice(0, maxlength);
+        }
       }
 
       if (props.type === 'number' || props.type === 'digit') {

src/field/test/index.spec.js

@@ -171,17 +171,25 @@ test('maxlength', async () => {
       value: 1234,
       type: 'number',
     },
+    listeners: {
+      input(value) {
+        wrapper && wrapper.setProps({ value });
+      },
+    },
   });
 
   const input = wrapper.find('input');
   expect(input.element.value).toEqual('123');
 
   input.element.value = 1234;
-  await later();
   input.trigger('input');
-
   expect(input.element.value).toEqual('123');
   expect(wrapper.emitted('input')[0][0]).toEqual('123');
+
+  // see: https://github.com/youzan/vant/issues/7265
+  input.element.value = 1423;
+  input.trigger('input');
+  expect(input.element.value).toEqual('123');
 });
 
 test('clearable prop', () => {