Fix number inputs for IE11

CHANGELOG.md

@@ -19,6 +19,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   - Added responsiveness on graph parent element resize (previously only worked on window.resize)
   - Added new `dash-graph--pending` class to dcc.Graph, present while resizing, (re-)rendering, loading
 
+### Fixed
+- [#731](https://github.com/plotly/dash-core-components/pull/731) Fixed bug in which input components with type `number` did not correctly update their values.
+
 ### Changed
 - [#723](https://github.com/plotly/dash-core-components/pull/723) Changed npm package content to allow source code inclusion from other projects
 - [#725](https://github.com/plotly/dash-core-components/pull/725) Improve async graph performance by parallelizing resource fetching instead of fetching sequentially

src/components/Input.react.js

@@ -31,7 +31,8 @@ export default class Input extends PureComponent {
     }
 
     componentWillReceiveProps(nextProps) {
-        const {value, valueAsNumber} = this.input.current;
+        const {value} = this.input.current;
+        const valueAsNumber = convert(value);
         this.setInputValue(
             isNil(valueAsNumber) ? value : valueAsNumber,
             nextProps.value
@@ -42,7 +43,8 @@ export default class Input extends PureComponent {
     }
 
     componentDidMount() {
-        const {value, valueAsNumber} = this.input.current;
+        const {value} = this.input.current;
+        const valueAsNumber = convert(value);
         this.setInputValue(
             isNil(valueAsNumber) ? value : valueAsNumber,
             this.props.value
@@ -109,7 +111,8 @@ export default class Input extends PureComponent {
     }
 
     onEvent() {
-        const {value, valueAsNumber} = this.input.current;
+        const {value} = this.input.current;
+        const valueAsNumber = convert(value);
         if (this.props.type === 'number') {
             this.setPropValue(
                 this.props.value,