Question

我在使用ElementRef时遇到以下错误：

通用类型'ElementRef'需要2个类型参数

我发现的唯一建议是更新我的角度版本（使用最新版本）。我更新了每个软件包。可悲的是什么都没有改变。代码：

组件

import { Component, OnInit,AfterViewInit,OnDestroy,ViewChild,ChangeDetectorRef,ElementRef} from '@angular/core';

export class UserComponent implements OnInit, AfterViewInit, OnDestroy {
    @ViewChild('cardInfo') cardInfo: ElementRef;
}

ElementRef引发错误

package.json：

{
  "name": "demo-web",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.1.4",
    "@angular/common": "^6.1.4",
    "@angular/compiler": "^6.1.4",
    "@angular/core": "^6.1.4",
    "@angular/forms": "^6.1.4",
    "@angular/http": "^6.1.4",
    "@angular/platform-browser": "^6.1.4",
    "@angular/platform-browser-dynamic": "^6.1.4",
    "@angular/router": "^6.1.4",
    "angular-jsvat": "^1.1.0",
    "core-js": "^2.5.4",
    "ng2-validation": "^4.2.0",
    "rxjs": "^6.0.0",
    "zone.js": "~0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "^0.7.5",
    "@angular/cli": "~6.1.5",
    "@angular/compiler-cli": "^6.1.4",
    "@angular/language-service": "^6.1.4",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "^5.4.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

Answer 1

好吧，我为此花了几个小时，但终于找到了解决方案。它与打字稿有关。我将打字稿从2.7.2更新为2.9.2（全局和本地），并且错误不再显示。我认为在有关此问题的较早问题中发布的解决方案确实具有误导性。

通用类型'ElementRef <t，any =“”>'需要2个类型参数

1 个答案: