例外:不能绑定到'ngFor'，因为它不是一个已知的本机属性

我做错了什么?

import {bootstrap, Component} from 'angular2/angular2'

@Component({
  selector: 'conf-talks',
  template: `<div *ngFor="talk of talks">
     {{talk.title}} by {{talk.speaker}}
     <p>{{talk.description}}
   </div>`
})
class ConfTalks {
  talks = [ {title: 't1', speaker: 'Brian', description: 'talk 1'},
            {title: 't2', speaker: 'Julie', description: 'talk 2'}];
}
@Component({
  selector: 'my-app',
  directives: [ConfTalks],
  template: '<conf-talks></conf-talks>'
})
class App {}
bootstrap(App, [])

错误是

EXCEPTION: Template parse errors:
Can't bind to 'ngFor' since it isn't a known native property
("<div [ERROR ->]*ngFor="talk of talks">

当前回答

另一个导致OP错误的拼写错误可以用在:

<div *ngFor="let talk in talks">

你应该用of代替:

<div *ngFor="let talk of talks">

2017-09-13 21:12:11

其他回答

此语句用于Angular2 Beta版本.....

以后用let代替#

Let关键字用于声明局部变量

2016-10-20 20:00:38

在我的例子中，我没有在for循环中声明循环变量

<div *ngFor="pizza of pizzas; index as i">

而不是

<div *ngFor="let pizza of pizzas; index as i">

在声明了“let”之后，它就对我有用了。

2021-11-21 21:09:16

你应该使用let关键字来声明局部变量 e.g. *ngFor="让我们谈谈吧"

2019-10-10 09:24:32

我忘记用“@Input”来注释我的组件(哎呀!)

html(违规代码):

<app-book-item
  *ngFor="let book of book$ | async"
  [book]="book">  <-- Can't bind to 'book' since it isn't a known property of 'app-book-item'
</app-book-item>

book-item.component.ts的修正版本:

import { Component, OnInit, Input } from '@angular/core';

import { Book } from '../model/book';
import { BookService } from '../services/book.service';

@Component({
  selector: 'app-book-item',
  templateUrl: './book-item.component.html',
  styleUrls: ['./book-item.component.css']
})
export class BookItemComponent implements OnInit {

  @Input()
  public book: Book;

  constructor(private bookService: BookService)  { }

  ngOnInit() {}

}

2019-01-18 00:39:54

在我的例子中，我犯了从文档中复制*ng-for=的错误。

https://angular.io/guide/user-input

如果我错了，请指正。但是*ng-for=似乎已经被更改为*ngFor=

2016-02-25 16:52:30

例外:不能绑定到'ngFor'，因为它不是一个已知的本机属性

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