message: fix cascader clickoutsider
diff: @@ -86,7 +86,10 @@ class Cascader extends Component {
  }
  clickOutside (e) {
  - if (ReactDOM.findDOMNode(this.inputContainer) && ReactDOM.findDOMNode(this.inputContainer).contains(e.target)) {
  + if (
  + (ReactDOM.findDOMNode(this.inputContainer) && ReactDOM.findDOMNode(this.inputContainer).contains(e.target)) ||
  + (ReactDOM.findDOMNode(this.menuNode) && ReactDOM.findDOMNode(this.menuNode).contains(e.target))
  + ) {
  return
  }
  this.hidePopper()
  @@ -357,6 +360,7 @@ class Cascader extends Component {
  placement='top-bottom-start'
  >
  <Menu
  + ref={node => { this.menuNode = node }}
  value={cascaderValue}
  options={filterOptions || options}
  root={() => this}
  