添加两个switch后会报错，然后打不开preview。

[OnlY0226]

vendor.7d1b3365.js:4 TypeError: Cannot read properties of undefined (reading 'validateField')
at main.26afb569.js:1:168741
at main.26afb569.js:1:55698
at Proxy.forEach ()
at Proxy.emit$ (main.26afb569.js:1:55686)
at Proxy.dispatch (main.26afb569.js:1:56132)
at Proxy.handleChangeEvent (main.26afb569.js:1:69630)
at Ur (vendor.7d1b3365.js:4:656)
at er (vendor.7d1b3365.js:4:735)
at tE (vendor.7d1b3365.js:4:3200)
at setup (vendor.7d1b3365.js:144:82525)

[OnlY0226]

也许是初始值为null的缘故，把初始值默认为true后可以了，或者在配置把默认值null改为false。