Angular2和TweenMax-未能执行'；滚动至'；在'；窗口'；：参数1（'；选项'；）不是对象

我有一些问题。我想创建一个按钮，将整个页面滚动到顶部。 这是我的密码

app.component.html

<p>lorem...</p> <!-- 100 times -->
<div (click)="scroll()">Scroll to top</div>

package.json

{


"name": "tabs-app",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.0.0",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "@types/gsap": "^1.19.1",
    "core-js": "^2.4.1",
    "gsap": "^1.20.2",
    "rxjs": "^5.4.1",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.2.4",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/language-service": "^4.0.0",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.0.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.0.4",
    "tslint": "~5.3.2",
    "typescript": "~2.3.3"
  }
}

public scroll() {
    // can you tell me why 'document.body.scrollTop' is always equals to 0
    // in Chrome ???
    if(document.body.scrollTop !== 0) {
        TweenLite.to(document.body, 1, {scrollTop: 0});
    }
    else {
        TweenLite.to(document.documentElement, 1, {scrollTop: 0});
    }
}

如果我点击按钮，我会看到大量的错误

无法在“窗口”上执行“滚动到”：参数1（“选项”）不是对象

---

你知道吗，怎么了？有什么想法吗？哦，我已经找到解决办法了！其实很简单。只需将

窗口

更改为

document.body

。这里有一个例子

scroll（）函数

{


"name": "tabs-app",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^4.0.0",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "@types/gsap": "^1.19.1",
    "core-js": "^2.4.1",
    "gsap": "^1.20.2",
    "rxjs": "^5.4.1",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.2.4",
    "@angular/compiler-cli": "^4.0.0",
    "@angular/language-service": "^4.0.0",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.0.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.0.4",
    "tslint": "~5.3.2",
    "typescript": "~2.3.3"
  }
}

public scroll() {
    // can you tell me why 'document.body.scrollTop' is always equals to 0
    // in Chrome ???
    if(document.body.scrollTop !== 0) {
        TweenLite.to(document.body, 1, {scrollTop: 0});
    }
    else {
        TweenLite.to(document.documentElement, 1, {scrollTop: 0});
    }
}

我希望有帮助