react multiple entrances:
webpack extract common module, compilation can pass, but execute JS error: "Uncaught ReferenceError: exports is not defined"

look at the big difference between the compiled file and the normally compiled file: for example,

exports.ids = [6];
exports.modules = {

/***/ 100:
/***/ (function(module, exports) {

module.exports = function (it, Constructor, name, forbiddenField) {
  if (!(it instanceof Constructor) || (forbiddenField !== undefined && forbiddenField in it)) {
    throw TypeError(name + ": incorrect invocation!");
  } return it;
};

error is located to the first line.
does this have anything to do with babel configuration? The configuration code is as follows:

{
    "presets": [
        ["es2015", {
            // "modules": false
        }],
        "stage-2",
        "react"
    ],
    "plugins": [
        "transform-decorators-legacy",
        "react-hot-loader/babel", ["transform-runtime", {
            "helpers": false,
            "polyfill": true,
            "regenerator": true,
            "moduleName": "babel-runtime"
        }]
    ]
}

ask the masters to help me solve my confusion.

problem description

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?