Update FieldTextInput: use defaultValue if uncontrolled

src/components/FieldTextInput/FieldTextInput.js

@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { func, object, shape, string } from 'prop-types';
+import { bool, func, object, shape, string } from 'prop-types';
 import { Field } from 'react-final-form';
 import classNames from 'classnames';
 import { ValidationError, ExpandingTextarea } from '../../components';
@@ -22,6 +22,8 @@ class FieldTextInputComponent extends Component {
       input,
       meta,
       onUnmount,
+      isUncontrolled,
+      inputRef,
       ...rest
     } = this.props;
     /* eslint-enable no-unused-vars */
@@ -41,6 +43,11 @@ class FieldTextInputComponent extends Component {
 
     const fieldMeta = { touched: hasError, error: errorText };
 
+    // Uncontrolled input uses defaultValue instead of value.
+    const { value: defaultValue, ...inputWithoutValue } = input;
+    // Use inputRef if it is passed as prop.
+    const refMaybe = inputRef ? { ref: inputRef } : {};
+
     const inputClasses =
       inputRootClass ||
       classNames(css.input, {
@@ -48,9 +55,20 @@ class FieldTextInputComponent extends Component {
         [css.inputError]: hasError,
         [css.textarea]: isTextarea,
       });
+    const maxLength = CONTENT_MAX_LENGTH;
     const inputProps = isTextarea
-      ? { className: inputClasses, id, rows: 1, maxLength: CONTENT_MAX_LENGTH, ...input, ...rest }
-      : { className: inputClasses, id, type, ...input, ...rest };
+      ? { className: inputClasses, id, rows: 1, maxLength, ...refMaybe, ...input, ...rest }
+      : isUncontrolled
+      ? {
+          className: inputClasses,
+          id,
+          type,
+          defaultValue,
+          ...refMaybe,
+          ...inputWithoutValue,
+          ...rest,
+        }
+      : { className: inputClasses, id, type, ...refMaybe, ...input, ...rest };
 
     const classes = classNames(rootClassName || css.root, className);
     return (
@@ -71,6 +89,8 @@ FieldTextInputComponent.defaultProps = {
   customErrorText: null,
   id: null,
   label: null,
+  isUncontrolled: false,
+  inputRef: null,
 };
 
 FieldTextInputComponent.propTypes = {
@@ -92,6 +112,12 @@ FieldTextInputComponent.propTypes = {
   // Either 'textarea' or something that is passed to the input element
   type: string.isRequired,
 
+  // Uncontrolled input uses defaultValue prop, but doesn't pass value from form to the field.
+  // https://reactjs.org/docs/uncontrolled-components.html#default-values
+  isUncontrolled: bool,
+  // a ref object passed for input element.
+  inputRef: object,
+
   // Generated by final-form's Field component
   input: shape({
     onChange: func.isRequired,