---
category: 2
title: 自定义已选项
title_en: Custom render
---

 zh-CN

例如给最后一项加上邮编链接。

 en-US

For instance, add an external link after the selected value.

````jsx
import { Cascader } from 'parkball';

const options = [{
  value: 'zhejiang',
  label: 'Zhejiang',
  children: [{
    value: 'hangzhou',
    label: 'Hangzhou',
    children: [{
      value: 'xihu',
      label: 'West Lake',
      code: 752100,
    }],
  }],
}, {
  value: 'jiangsu',
  label: 'Jiangsu',
  children: [{
    value: 'nanjing',
    label: 'Nanjing',
    children: [{
      value: 'zhonghuamen',
      label: 'Zhong Hua Men',
      code: 453400,
    }],
  }],
}];

function handleAreaClick(e, label, option) {
  e.stopPropagation();
  console.log('clicked', label, option);
}

const displayRender = (labels, selectedOptions) => labels.map((label, i) => {
  const option = selectedOptions[i];
  if (i === labels.length - 1) {
    return (
      <span key={option.value}>
        {label} (<a onClick={e => handleAreaClick(e, label, option)}>{option.code}</a>)
      </span>
    );
  }
  return <span key={option.value}>{label} / </span>;
});

ReactDOM.render(
  <Cascader
    options={options}
    defaultValue={['zhejiang', 'hangzhou', 'xihu']}
    displayRender={displayRender}
    style={{ width: '100%' }}
  />,
  mountNode);
````