npm WARN bootstrap@4.2.1 requires a peer of jquery@1.9.1 - 3 but none is installed

问题

I tried to install bootstrap in my Angular Project by

npm install --g bootstrap

but i am getting following warning

npm WARN bootstrap@4.2.1 requires a peer of jquery@1.9.1 - 3 but none is installed. You must install peer dependencies yourself.

npm WARN bootstrap@4.2.1 requires a peer of popper.js@^1.14.6 but none is installed. You must install peer dependencies yourself.

I am using following version of ng and npm

Angular CLI: 7.1.4
Node: 10.15.0
OS: win32 x64
Angular: 7.1.4
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.11.4
@angular-devkit/build-angular     0.11.4
@angular-devkit/build-optimizer   0.11.4
@angular-devkit/build-webpack     0.11.4
@angular-devkit/core              7.1.4
@angular-devkit/schematics        7.1.4
@ngtools/webpack                  7.1.4
@schematics/angular               7.1.4
@schematics/update                0.11.4
rxjs                              6.3.3
typescript                        3.1.6
webpack                           4.23.1

回答1:

Just do as it says:

npm i jquery@1.9.1 --save

the option --save is to save this dependency to your project.

回答2:

This worked for me -

npm i -g npm@3.10.10

回答3:

I had the same problem and this is the solution:

npm install bootstrap jquery popper.js --save

The system automatically resolves the references for you.

回答4:

I resolved the above issue by running the npm command

npm install --save bootstrap

回答5:

In your package.json file search for "dependencies" and editing it to show as

  "dependencies": {
     //same lib
    "jquery": "^1.9.1",
  },

or run this command from cmd

npm i jquery@1.9.1 --save

回答6:

I have resolved jQuery dependency with following steps in my react development project

npm install react-bootstrap bootstrap --save
npm audit fix --force

Result: found 0 vulnerabilities

It also fixes the issue, if another dependency is having issues.

回答7:

just check the path where you are working:-

$ pwd

if you are not in your project directory then type:

$ cd your-app

after checking all those above things than type:

npm install --g bootstrap

来源：https://stackoverflow.com/questions/54097328/npm-warn-bootstrap4-2-1-requires-a-peer-of-jquery1-9-1-3-but-none-is-install

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