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class User {
constructor(id) {
this.id_ = id;
}
}
const proxy = new Proxy(User, {
construct(target, argumentsList, newTarget) {
if (argumentsList[0] === undefined) {
throw 'User cannot be instantiated without id';
} else {
return Reflect.construct(...arguments);
}
}
});
new proxy(1);
console.log('------------------------------')
new proxy();
// Uncaught User cannot be instantiated without id |
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楼主: jsjss
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发表于 2021-6-23 16:32
