Fix Form onSubmit

package.json

@@ -1,6 +1,6 @@
 {
   "name": "element-react",
-  "version": "1.1.7",
+  "version": "1.1.8",
   "description": "Element UI for React",
   "private": false,
   "main": "dist/npm/es5/index.js",

src/form/Form.jsx

@@ -73,7 +73,7 @@ export default class Form extends Component {
     return (
       <form style={this.style()} className={this.className('el-form', this.props.labelPosition && `el-form--label-${this.props.labelPosition}`, {
         'el-form--inline': this.props.inline
-      })}>{this.props.children}</form>
+      })} onSubmit={this.props.onSubmit}>{this.props.children}</form>
     )
   }
 }
@@ -88,7 +88,8 @@ Form.propTypes = {
   labelPosition: PropTypes.oneOf(['right', 'left', 'top']),
   labelWidth: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
   labelSuffix: PropTypes.string,
-  inline: PropTypes.bool
+  inline: PropTypes.bool,
+  onSubmit: PropTypes.func
 }
 
 Form.defaultProps = {

src/form/FormItem.jsx

@@ -156,29 +156,29 @@ export default class FormItem extends Component {
     });
   }
 
-  labelStyle(): { width?: number } {
+  labelStyle(): { width?: number | string } {
     const ret = {};
 
     if (this.parent().props.labelPosition === 'top') return ret;
 
     const labelWidth = this.props.labelWidth || this.parent().props.labelWidth;
 
     if (labelWidth) {
-      ret.width = Number(labelWidth);
+      ret.width = parseInt(labelWidth);
     }
 
     return ret;
   }
 
-  contentStyle(): { marginLeft?: number } {
+  contentStyle(): { marginLeft?: number | string } {
     const ret = {};
 
     if (this.parent().props.labelPosition === 'top' || this.parent().props.inline) return ret;
 
     const labelWidth = this.props.labelWidth || this.parent().props.labelWidth;
 
     if (labelWidth) {
-      ret.marginLeft = Number(labelWidth);
+      ret.marginLeft = parseInt(labelWidth);
     }
 
     return ret;