requirements and problems
as shown in the following figure: https://nghttps://api-v5.segmentfault.com/question/.anthttps://api-v5.segmentfault.com/question/.design/versionhttps://api-v5.segmentfault.com/question/.
1https://api-v5.segmentfault.com/question/. Click the first select, pop-up option (use cdk, to have a layer of backdrop, at this time, if you click somewhere else, it will be blocked by backdrop, so put away the option of the first selecthttps://api-v5.segmentfault.com/question/. )
2https://api-v5.segmentfault.com/question/. If the mouse moves to the second select and clicks, I hope there is a way to click through the backdrop, that is, to turn off the option just opened by the first select, and then pop up the option for the second select;
3https://api-v5.segmentfault.com/question/. If you move the mouse to another place and click, you just need to turn off the option just opened by the first select
https://api-v5.segmentfault.com/question/.the environmental background of the problems and what methods you have tried
ng-zorro 0https://api-v5.segmentfault.com/question/.7https://api-v5.segmentfault.com/question/.x
angular4
refers to the implementation of elementui for vuehttps://api-v5.segmentfault.com/question/. It"s an instruction-based
effecthttps://api-v5.segmentfault.com/question/. See
http://elementhttps://api-v5.segmentfault.com/question/.elemehttps://api-v5.segmentfault.com/question/.io/-sharp/zh-https://api-v5.segmentfault.com/question/.
source code here:
ide.js" rel= "nofollow noreferrer" > https://githubhttps://api-v5.segmentfault.com/question/.com/ElemeFE/elhttps://api-v5.segmentfault.com/question/.
https://githubhttps://api-v5.segmentfault.com/question/.com/ElemeFE/elhttps://api-v5.segmentfault.com/question/.
be implemented in directive in ng?