关于Typescript编译的模块用System.js导入时出现的错误的疑问
最近在学习使用system.js导入typescript编译的模块。之前是用require.js进行的导入，能正常工作。但是迁移到system.js的时候出错了。在应用system-production.js时，控制台跳出错误信息：
Uncaught (in promise) Error: Module instantiation did not call an anonymous or correctly named System.register.
Instantiating https://www.star.com/libs/js/klondike.js
Loading ./libs/js/klondike.js
at register-loader.js:203
t @ common.js:83
(anonymous) @ loader-polyfill.js:70
我不太明白是什么导致了这个错误信息。而且当我应用system.src.js时，没有错误信息，但是我也没法调用导入的模块。任何调用返回的都是undefined。是我操作有误吗？
以下是源码：
test.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
</body>
<!-- sys import -->
<script src="libs/js/system-production.js"></script>
<!--<script src="libs/js/system.src.js"></script>-->
<script>
System.import("./libs/js/klondike.js");
</script>
</html>tsconfig.json
{
"compilerOptions": {
"module": "System",
"outFile": "../../js/klondike.js",
"target": "es5",
"sourceMap": true,
"removeComments": true
},
"include": [
"./*"
]
}主模块: CardMoves.ts
//sys import
import * as DBJSN from "./debugJson";
import PokerCard from "./Cards";
let suits: string[] = ["spade", "heart", "club", "diamond"];
let cards: string[] = [, "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"];
//sys export
export function createDeck() {
let playCards: PokerCard[] = new Array(DBJSN.settings.decks*52);
console.log(playCards);
for (let i=0; i<playCards.length; i++) {
playCards[i] = new PokerCard();
playCards[i].suit = suits[Math.floor(i % 52 / 13)];
playCards[i].card = i % 52 % 13 + 1;
}
return playCards;
}依赖1: Cards.ts
//sys export
export default class PokerCard {
private _suit: string;
private _card: number;
constructor() {}
//Suit getter and setter
get suit(): string {
return this._suit;
}
set suit(newSuit: string) {
try {
if (this._suit === undefined)
this._suit = newSuit;
else
throw "Suit value has been set.";
}
catch(e) {
console.log(e);
}
}
//Card getter and setter
get card(): number {
return this._card;
}
set card(newCard: number) {
try {
if (this._card === undefined)
this._card = newCard;
else
throw "Card value has been set.";
}
catch(e) {
console.log(e);
}
}
}依赖2: debugJson.ts
//sys export
export let settings = {
decks: 1,
cardsPerClick: 1,
timer: true
};如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
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得看看klondike.js这个文件是怎么封装模块的