jquery - 未满足的对等依赖 popper.js

Question

由于依赖 jquery 3x，我在使用某些 ng-bootstrap 下拉组件时遇到问题，而 jquery 3x 又无法找到 popper.js

在我的控制台中查看此内容

Uncaught Error: Bootstrap dropdown require Popper.js

我该如何解决这个问题？

使用 npm 安装 jquery 显示了对 popper.js 的依赖，但该依赖不在 npm 注册表中

└── UNMET PEER DEPENDENCY popper.js@^1.11.0

这是我在 package.json 中的依赖项

"dependencies": {
    "@angular/animations": "^4.2.4",
    "@angular/common": "^4.2.4",
    "@angular/compiler": "^4.2.4",
    "@angular/core": "^4.2.4",
    "@angular/forms": "^4.2.4",
    "@angular/http": "^4.2.4",
    "@angular/platform-browser": "^4.2.4",
    "@angular/platform-browser-dynamic": "^4.2.4",
    "@angular/router": "^4.2.4",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.1",
    "bootstrap": "^4.0.0-beta",
    "core-js": "^2.4.1",
    "font-awesome": "^4.7.0",
    "jquery": "^3.2.0",
    "rxjs": "^5.4.2",
    "zone.js": "^0.8.14"
  },

Answer 1

Popper.js 现在可以从 npm 安装:

npm install popper.js --save