Question

我是babel的新手，我正在尝试使用polyfill并以promise对其进行测试。但是polyfill将require（）添加到浏览器不支持的输出文件中（猜测为ES6功能）。

我正在使用babel 6（我知道有babel 7，但这只是为了学习...）

反正这里是代码：

package.json

{
  "name": "testbabel",
  "version": "1.0.0",
  "description": "testing babel",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "start ./src/index.html chrome",
    "babel":"./node_modules/.bin/babel src -d lib"
              
  },
  "author": "AJ",
  "license": "ISC",
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.3",
    "babel-plugin-transform-runtime": "^6.23.0",
    "babel-preset-es2015": "^6.24.1"
  },
  "dependencies": {
    "babel-polyfill": "^6.26.0"
  }
}

src / index.js

    import "babel-polyfill";


let customer = { name: "Moshe" },
    message = `Hello ${customer.name}`;

console.log(message); //Hello Moshe
const promise1 = new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('foo');
    }, 300);
  });
  
  promise1.then((value) => {
    console.log(value);
    // expected output: "foo"
  });
  
  console.log(promise1);

document.querySelector('.input')
.addEventListener('input',e =>
{
    document.querySelector('.output').innerHTML = document.querySelector('.input').value;
});

lib / index.js（转换为es5 .js文件）在此处发生错误

    "use strict";

var _promise = require("babel-runtime/core-js/promise"); //this is where the error ocurrs

var _promise2 = _interopRequireDefault(_promise);

require("babel-polyfill");

require("babel-core");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var customer = { name: "Moshe" },
    message = "Hello " + customer.name;

console.log(message); //Hello Moshe
var promise1 = new _promise2.default(function (resolve, reject) {
  setTimeout(function () {
    resolve('foo');
  }, 300);
});

promise1.then(function (value) {
  console.log(value);
  // expected output: "foo"
});

console.log(promise1);

document.querySelector('.input').addEventListener('input', function (e) {
  document.querySelector('.output').innerHTML = document.querySelector('.input').value;
});
//# sourceMappingURL=data:application/json;charset=utf-...

.babelrc

{
"presets": ["es2015"],
"env": {
    "production":{ "commets":false } ,
    "development": { "comments": true,
        "sourceMaps": "both"
        
    } 
}

}

，错误是：

error

babel文档说首先运行polyfill，我真的不了解（没有webpack）如何运行。

谢谢

如何使用babel 6 polyfill？ polyfill添加require（）会导致错误

0 个答案: