how could i config the @vitejs/plugin-legacy to deconstruction proxy on old chrome(e.g 71.0.3578.80)

[Jinzm]

in my code, i deconstruction a proxy object like
const a = {...props.data}
props.datais a json data.after build,on the lastest browser is right.but on the 71.0.3578.80,get a wrong object with nothing