仅安装package.json中包含的软件包

Question

I just want to install only packages that are included in the packages.json. But when I run npm install , over 800 packages are suddenly installed. Is there a specific command to realize this or is my package.json (see below) wrong?

    {
      "name": "test",
      "version": "1.0.0",
      "description": "test",
      "main": "app.js",
      "scripts": {
        "test": "echo \"Error: no test specified\" && exit 1"
      },
      "author": "test",
      "license": "ISC",
      "devDependencies": {
        "browser-sync": "^2.13.0",
        "gulp": "^3.9.1",
        "gulp-autoprefixer": "^5.0.0",
        "gulp-concat": "^2.6.0",
        "gulp-cssnano": "^2.1.2",
        "gulp-htmlmin": "^4.0.0",
        "gulp-imagemin": "^4.1.0",
        "gulp-install": "^1.1.0",
        "gulp-jade": "^1.1.0",
        "gulp-jsonminify": "^1.0.0",
        "gulp-ng-annotate": "^2.0.0",
        "gulp-sass": "^4.0.1",
        "gulp-uglify": "^3.0.0"
      },
      "dependencies": {
        "critical": "^1.2.2",
        "imagemin-pngquant": "^5.0.0"
      }
    }

Answer 1

npm install uses package.json to install packages you want AND their own dependencies. So you haven't choice unless you want broken packages ? In that case you could manually uninstall packages you don't want.

Answer 2

I am not sure why would that be happening, whenever we run npm install it picks up the package.json and installs packages defined in it including the transitive dependencies. By looking at your package.json there should not be 800 of them.unless you have multiple package.json linked up with each other. I would recommend to copy package.json to a different directory and clear cached in modules and

run npm install --log-level=verbose this should give in the details for the rest packages being called up.

Answer 3

In this case when u install this packages the dependencies of that particular packages has also been installed.

Like if u install critical module then => bluebird chalk cheerio clean-css cli debug filter-css fs-extra ... etc has also been installed, that's the case in here