这个是在Github 看到的评论，感觉写的不错，就直接搬过来了
比较
export default 和 import x = require('')区别
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export default class Calculator {
' public add(num1, num2) { // function Calculator() {}
return num1 + num2; // Calculator.prototype.add = function (num1, num2) {
} // return num1 + num2;
} // };
// return Calculator;
// }());
// exports["default"] = Calculator;
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import … from “module”;
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import Calculator from "./calculator";
let calc = new Calculator();
console.log(calc.add(2, 2));
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Notes:
- A default export can be imported with any name.
- Functionally equivalent to
import * as Calculator from "./calculator"; and then instantiating it using new Calculator.default().
export = …
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export = class Calculator {
public add(num1, num2) {
return num1 + num2;
}
}
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import … = require(“module”);
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import Calculator = require("./calculator");
let calc = new Calculator();
console.log(calc.add(2, 2));
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Notes:
- This syntax is only used when importing a CommonJS module.
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export class Calculator {
public add(num1, num2) {
return num1 + num2;
}
}
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import { … } from “module”;
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import { Calculator } from "./calculator";
let calc = new Calculator();
console.log(calc.add(2, 2));
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Notes:
- Named exports are useful to export several values.
- During the import, you must use the same name of the corresponding object.