The problem of React using Select components of Antd to dynamically transform Option

there are two Select selection boxes.
the data source of the first Select box is the value already passed by the background when the page is rendered. The option of the
second Select box needs to be dynamically changed according to the selection result of the first Select box.
is not a traditional cascade. The Option of the second Select depends on the result of the first Select and is updated to the foreground after dynamic calculation by the background.

in this case, how do you define the Option of the second Select?

React.js javascript
Mar.11,2021

it's no different. After the first Select is selected, the data returned by ajax, can be updated with data.
for example: 

ajaxCall = () => {
    ajax().then(changeList2)
}

renderOptions = () => {
    return this.props.list.map(element =>
      <Option key={element.id} value={element.id}> {element.address}</Option>);
  };


<Select onclick={ajaxCall}>
    <Option>value1</Option>
</Select>
    
<Select>
    {renderOptions()}
</Select>

to put it bluntly, it's just a matter of data. You don't need to care about how to render, you just need to care about how the data comes from and how to convert it to a format that Select can render

.

Previous: Vue-cli introduces vux to report errors?

Next: Database clothing inventory table design?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3c3ec-44690.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3c3ec-44690.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?