chore demo code style

components/slider/demo/input-number.md

@@ -28,17 +28,18 @@ class IntegerStep extends React.Component {
   }
 
   render() {
+    const { inputValue } = this.state;
     return (
       <Row>
         <Col span={12}>
-          <Slider min={1} max={20} onChange={this.onChange} value={this.state.inputValue} />
+          <Slider min={1} max={20} onChange={this.onChange} value={inputValue} />
         </Col>
         <Col span={4}>
           <InputNumber
             min={1}
             max={20}
             style={{ marginLeft: 16 }}
-            value={this.state.inputValue}
+            value={inputValue}
             onChange={this.onChange}
           />
         </Col>
@@ -59,10 +60,17 @@ class DecimalStep extends React.Component {
   }
 
   render() {
+    const { inputValue } = this.state;
     return (
       <Row>
         <Col span={12}>
-          <Slider min={0} max={1} onChange={this.onChange} value={this.state.inputValue} step={0.01} />
+          <Slider
+            min={0}
+            max={1}
+            onChange={this.onChange}
+            value={inputValue}
+            step={0.01}
+          />
         </Col>
         <Col span={4}>
           <InputNumber
@@ -70,7 +78,7 @@ class DecimalStep extends React.Component {
             max={1}
             style={{ marginLeft: 16 }}
             step={0.01}
-            value={this.state.inputValue}
+            value={inputValue}
             onChange={this.onChange}
           />
         </Col>