1
用Mongoose探索Javascript ES6类,并且无法访问类变量。我想在cursor.on(data)
事件中使用this.name
引用在类的构造函数中声明的变量。我怎样才能做到这一点?Javascript ES6类变量
'use strict';
const Mongo = require('../mongo')
class Example {
constructor() {
this.name = 'Test Class';
}
export(docId, callback) {
console.log('In export' + docId);
const cursor = Mongo.findDocById(docId);
console.log(this.name); // Prints "Test Class"
cursor.on('data', function (document) {
console.log(document);
console.log(this.name); // Prints "undefined"
});
cursor.on('close', function() {
Mongo.close();
callback(null, 'Success')
});
}
}
谁知道错误的'这个'在非箭头lambda里面的伪造? – naomik
@naomik只是标准的一个:-) – Bergi
谢谢Bergi^_^ – naomik