docs: update docs for Form, ref: #4093

components/form/index.en-US.md

@@ -99,7 +99,7 @@ If you use `react@<15.3.0`, then, you can't use `getFieldDecorator` in stateless
 |-----------|-----------------------------------------|------|---------------|
 | id | The unique identifier is required. support [nested fields format](https://github.com/react-component/form/pull/48). | string | |
 | options.valuePropName | Props of children node, for example, the prop of Switch is 'checked'. | string | 'value' |
-| options.initialValue | You can specify initial value, type, optional value of children node. | | n/a |
+| options.initialValue | You can specify initial value, type, optional value of children node. (Note: Because `Form` will test equality with `===` internaly, we recommend to use vairable as `initialValue`, instead of literal) | | n/a |
 | options.trigger | When to collect the value of children node | string | 'onChange' |
 | options.getValueFromEvent | To convert parameters of onChange to the value of control | function(..args) | [reference](https://github.com/react-component/form#optiongetvaluefromevent) |
 | options.validateTrigger | When to validate the value of children node. | string\|string[] | 'onChange' |

components/form/index.zh-CN.md

@@ -100,7 +100,7 @@ CustomizedForm = Form.create({})(CustomizedForm);
 |-----------|-----------------------------------------|-----|--------|
 | id | 必填输入控件唯一标志。支持嵌套式的[写法](https://github.com/react-component/form/pull/48)。 | string | |
 | options.valuePropName | 子节点的值的属性，如 Switch 的是 'checked' | string | 'value' |
-| options.initialValue | 子节点的初始值，类型、可选值均由子节点决定  | | |
+| options.initialValue | 子节点的初始值，类型、可选值均由子节点决定(注意：由于内部校验时使用 `===` 判断是否变化，建议使用变量缓存所需设置的值而非直接使用字面量)) | | |
 | options.trigger | 收集子节点的值的时机 | string | 'onChange' |
 | options.getValueFromEvent | 可以把 onChange 的参数转化为控件的值 | function(..args) | [reference](https://github.com/react-component/form#optiongetvaluefromevent) |
 | options.validateTrigger | 校验子节点值的时机 | string\|string[] | 'onChange' |