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JavaScript Express Basics Getting Started with Express Review Installing Express

After npm init for express

After installing during the first video I now have a package-lock.json? Any meaning?

{
  "name": "flashcards",
  "version": "1.0.0",
  "lockfileVersion": 1,
  "requires": true,
  "dependencies": {
    "accepts": {
      "version": "1.3.5",
      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz",
      "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
      "requires": {
        "mime-types": "~2.1.18",
        "negotiator": "0.6.1"
      }
    },
    "array-flatten": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
    },
    "body-parser": {
      "version": "1.18.2",
      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.18.2.tgz",
      "integrity": "sha1-h2eKGdhLR9hZuDGZvVm84iKxBFQ=",
      "requires": {
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        "content-type": "~1.0.4",
        "debug": "2.6.9",
        "depd": "~1.1.1",
        "http-errors": "~1.6.2",
        "iconv-lite": "0.4.19",
        "on-finished": "~2.3.0",
        "qs": "6.5.1",
        "raw-body": "2.3.2",
        "type-is": "~1.6.15"
      }
    },
    "bytes": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
    },
    "content-disposition": {
      "version": "0.5.2",
      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
    },
    "content-type": {
      "version": "1.0.4",
      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
    },
    "cookie": {
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      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
    },
    "cookie-signature": {
      "version": "1.0.6",
      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
    },
    "debug": {
      "version": "2.6.9",
      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
      "requires": {
        "ms": "2.0.0"
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      "version": "1.1.2",
      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
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    "destroy": {
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      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
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    "ee-first": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
    },
    "encodeurl": {
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      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
    },
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      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
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      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
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      "resolved": "http://registry.npmjs.org/express/-/express-4.16.3.tgz",
      "integrity": "sha1-avilAjUNsyRuzEvs9rWjTSL37VM=",
      "requires": {
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        "array-flatten": "1.1.1",
        "body-parser": "1.18.2",
        "content-disposition": "0.5.2",
        "content-type": "~1.0.4",
        "cookie": "0.3.1",
        "cookie-signature": "1.0.6",
        "debug": "2.6.9",
        "depd": "~1.1.2",
        "encodeurl": "~1.0.2",
        "escape-html": "~1.0.3",
        "etag": "~1.8.1",
        "finalhandler": "1.1.1",
        "fresh": "0.5.2",
        "merge-descriptors": "1.0.1",
        "methods": "~1.1.2",
        "on-finished": "~2.3.0",
        "parseurl": "~1.3.2",
        "path-to-regexp": "0.1.7",
        "proxy-addr": "~2.0.3",
        "qs": "6.5.1",
        "range-parser": "~1.2.0",
        "safe-buffer": "5.1.1",
        "send": "0.16.2",
        "serve-static": "1.13.2",
        "setprototypeof": "1.1.0",
        "statuses": "~1.4.0",
        "type-is": "~1.6.16",
        "utils-merge": "1.0.1",
        "vary": "~1.1.2"
      }
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    "finalhandler": {
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      "requires": {
        "debug": "2.6.9",
        "encodeurl": "~1.0.2",
        "escape-html": "~1.0.3",
        "on-finished": "~2.3.0",
        "parseurl": "~1.3.2",
        "statuses": "~1.4.0",
        "unpipe": "~1.0.0"
      }
    },
    "forwarded": {
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      "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.1.2.tgz",
      "integrity": "sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ="
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    "fresh": {
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      "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
      "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
    },
    "http-errors": {
      "version": "1.6.3",
      "resolved": "http://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
      "integrity": "sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=",
      "requires": {
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        "inherits": "2.0.3",
        "setprototypeof": "1.1.0",
        "statuses": ">= 1.4.0 < 2"
      }
    },
    "iconv-lite": {
      "version": "0.4.19",
      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.19.tgz",
      "integrity": "sha512-oTZqweIP51xaGPI4uPa56/Pri/480R+mo7SeU+YETByQNhDG55ycFyNLIgta9vXhILrxXDmF7ZGhqZIcuN0gJQ=="
    },
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      "version": "2.0.3",
      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
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    "ipaddr.js": {
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      "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.8.0.tgz",
      "integrity": "sha1-6qM9bd16zo9/b+DJygRA5wZzix4="
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    "media-typer": {
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      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
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    "parseurl": {
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    "path-to-regexp": {
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      "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.0.tgz",
      "integrity": "sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4="
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      "integrity": "sha1-vNYMd9Prk83gBQKVw/N5OJvIj4k=",
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        "http-errors": "1.6.2",
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          "integrity": "sha1-V4O04cRZ8G+lyif5kfPQbnoxA1k="
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          "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.2.tgz",
          "integrity": "sha1-CgAsyFcHGSp+eUbO7cERVfYOxzY=",
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      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
    }
  }
}

1 Answer

Tim Knight
Tim Knight
28,888 Points

Hi David,

Yes the package-lock.json file works with npm to lock in the current versions of the npm packages you have installed that are listed within your package.json file for your project If you're version controlling your project, you would include this file so all of the members on your team are using the exact same versions of the associated libraries.

Okay so it's normal! Awesome... Never seen a package-lock file name.

Tim Knight
Tim Knight
28,888 Points

Yup, completely normal!