npm install babel-polyfill --save
npm WARN rm not removing C:\Users\ko880\Desktop\travel\node_modules.bin\mkdirp.cmd as it wasn’t installed by C:\Users\ko880\Desktop\travel\node_modules_mkdirp@0.5.1@mkdirp
npm WARN rm not removing C:\Users\ko880\Desktop\travel\node_modules.bin\mkdirp as it wasn’t installed by C:\Users\ko880\Desktop\travel\node_modules_mkdirp@0.5.1@mkdirp
npm WARN rm not removing C:\Users\ko880\Desktop\travel\node_modules.bin\json5.cmd as it wasn’t installed by C:\Users\ko880\Desktop\travel\node_modules_json5@1.0.1@json5
npm WARN rm not removing C:\Users\ko880\Desktop\travel\node_modules.bin\json5 as it wasn’t installed by C:\Users\ko880\Desktop\travel\node_modules_json5@1.0.1@json5
npm WARN css-loader@3.0.0 requires a peer of webpack@^4.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN url-loader@2.0.1 requires a peer of webpack@^4.0.0 but none is installed. You must install peer dependencies yourself.
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