Docs: warn input as a controlled component. (#14463)

Explicitly states that input events should be handled, and v-model modifiers
are not supported.

examples/docs/en-US/input.md

@@ -148,6 +148,15 @@
 
 Input data using mouse or keyboard.
 
+:::warning
+Input is a controlled component, it **always shows Vue binding value**.
+
+Under normal circumstances, `input` event should be handled. Its handler should update component's binding value (or use `v-model`). Otherwise, input box's value will not change.
+
+Do not support `v-model` modifiers.
+:::
+
+
 ### Basic usage
 
 :::demo

examples/docs/es/input.md

@@ -148,6 +148,14 @@
 
 Ingresa datos usando el ratón o teclado.
 
+:::warning
+Input is a controlled component, it **always shows Vue binding value**.
+
+Under normal circumstances, `input` event should be handled. Its handler should update component's binding value (or use `v-model`). Otherwise, input box's value will not change.
+
+Do not support `v-model` modifiers.
+:::
+
 ### Uso básico
 
 :::demo

examples/docs/fr-FR/input.md

@@ -148,6 +148,14 @@
 
 Le champs d'input de base.
 
+:::warning
+Input is a controlled component, it **always shows Vue binding value**.
+
+Under normal circumstances, `input` event should be handled. Its handler should update component's binding value (or use `v-model`). Otherwise, input box's value will not change.
+
+Do not support `v-model` modifiers.
+:::
+
 ### Usage
 
 :::demo

examples/docs/zh-CN/input.md

@@ -185,6 +185,14 @@
 
 通过鼠标或键盘输入字符
 
+:::warning
+Input 为受控组件，它**总会显示 Vue 绑定值**。
+
+通常情况下，应当处理 `input` 事件，并更新组件的绑定值（或使用`v-model`）。否则，输入框内显示的值将不会改变。
+
+不支持 `v-model` 修饰符。
+:::
+
 ### 基础用法
 
 :::demo