feat: add initial value prop

Author: Marco Cesarato

PROPS.md

@@ -34,6 +34,7 @@
 | `fontFamily`            | Custom fontFamily of the text input of the Spinner                                      | String           | System Default   |                                   |
 | `fontSize`              | Custom fontSize of the text input of the Spinner                                        | Number           | `14`             |                                   |
 | `height`                | Custom height of the Spinner                                                            | Number           | `50`             |                                   |
+| `initialValue`          | Initial value of the Spinner                                                            | String<br>Number | `0`              |                                   |
 | `inputStyle`            | Input Style (Text number at middle)                                                     | Object           |                  | Could overwrite other props       |
 | `maxLength`             | Limits the maximum number of characters that can be entered.                            | Number           |                  |                                   |
 | `max`                   | Max number permitted                                                                    | String<br>Number | `0`              |                                   |

README.md

@@ -105,7 +105,8 @@ Check the "[Props List](PROPS.md)" file to have the complete list of component p
 | `append`            | Custom element before right button                                                      | Component        |         |                                   |
 | `autofocus`         | If `true`, focuses the input on `componentDidMount`.                                    |                  | `false` |                                   |
 | `disabled`          | Disable the Spinner or not                                                              | Boolean          | `false` |                                   |
-| `editable`          | Set if input number field is editable or not                                            | Boolean          | `true`  |                                   |
+| `editable`          | Set if input number field is editable or not                                             | Boolean          | `true`  |                                   |
+| `initialValue`      | Initial value of the Spinner                                                        | String<br>Number | `0`         |                                   |
 | `maxLength`         | Limits the maximum number of characters that can be entered.                            | Number           |         |                                   |
 | `max`               | Max number permitted                                                                    | String<br>Number | `0`     |
 | `min`               | Min value permitted                                                                     | String<br>Number | `99`    |

index.js

@@ -29,7 +29,7 @@ class InputSpinner extends Component {
 		this.state = {
 			min: this.parseNum(this.props.min),
 			max: this.parseNum(this.props.max),
-			value: this.parseNum(this.props.value),
+			value: this.parseNum(!isNaN(this.props.initialValue) ? this.props.initialValue : this.props.value),
 			step: spinnerStep,
 			focused: false,
 			buttonPress: null,
@@ -828,6 +828,7 @@ InputSpinner.defaultProps = {
 	min: 0,
 	max: 999,
 	value: 0,
+	initialValue: null,
 	step: 1,
 	precision: 2,
 	rounded: true,