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webpack报错，webpack引入css报错，You may need an appropriate loader to ，·· The 'mode' option has not been set, webpack will fallback to 'production' for this value.Set 'mode' option to 'development' or 'production' to，npm run bulid后。 'webpack' 不是内部或外部命令，也不是可运行的程

Uncaught TypeError: Cannot read properties of undefined (reading 'touchstart'), Uncaught TypeError: Cannot read properties of undefined (reading 'click'), Cannot read properties of undefined (reading 'prototype') vant ,vue,弹出框，单页面使用vue,vant,vant弹框取消确定关闭不生效