Vue is free to control the legend icon when using echarts (only one type of data is displayed at a time)

Click water does not show gas volume, click gas volume does not show water volume. How do you make it happen? -sharp-sharp-sharp problem description

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Aug.14,2021

legend.selectedMode set to single radio mode can only select
http://www.echartsjs.com/opti.

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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-64f5-1e593b8-45508.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e593b8-45508.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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