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  • core-js@2 core-js@3报错问题

    WARNING: We noticed you're using the `useBuiltIns` option without declaring a core-js version. Currently, we assume version 2.x when no version is passed. Since this default version will likely change in future versions of Babel, we recommend explicitly setting the core-js version you are using via the `corejs` option.
    
    You should also be sure that the version you pass to the `corejs` option matches the version specified in your `package.json`'s `dependencies` section. If it doesn't, you need to run one of the following commands:
    
      npm install --save core-js@2    npm install --save core-js@3
      yarn add core-js@2              yarn add core-js@3
    
    Successfully compiled 1 file with Babel.
    {
        "presets": [
            ["@babel/env",
                {
                    "targets": {
                        "edge": "17",
                        "firefox": "60",
                        "chrome": "67",
                        "safari": "11.1"
                    },
                    "useBuiltIns": "usage",
                    "corejs": "2"  //是因为少了这行代码(运行时去掉注释)
                    
                }
            ]
        ]
    }
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  • 原文地址:https://www.cnblogs.com/lguow/p/12880384.html
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