NodeJS: Difference between revisions

NodeJS (view source)

Revision as of 13:12, 25 September 2019

298 bytes added , 25 September 2019

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David

Bureaucrats, Interface administrators, Administrators

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 Node Package Manager (npm) is used to manage node packages installed on your computer or used in your node projects.<br>
-==Installation==
+=Installation=
-===Windows===
+==Windows==
 Just download the latest LTS release from [https://nodejs.org/en/ the Node.js website]
-===Linux===
+==Linux==
 Using the [https://github.com/nvm-sh/nvm Node Version Manager (nvm)] is recommended. This does not require sudo as nvm is installed in your home directory.
 You should never use sudo when using npm. Doing so could lead to permission issues.
@@ Line 17: / Line 17: @@
 </syntaxhighlight>
-==Usage==
+=Usage=
 JavaScript files can be run directly using <code>node index.js</code>
-===NPM===
+==Filesystem Access==
-To add node packages to an new project. Use <code>npm init</code><br>
+Install [https://www.npmjs.com/package/fs-extra fs-extra] to your project.
-To download the dependencies for a node project, run <code>npm install</code> or <code>npm ci</code>.<br>
-<code>npm install</code> installs the latest dependencies listed in <code>package.json</code> subject to the requirements listed in that file. It also updates <code>package-lock.json</code>.<br>
-<code>npm ci</code> installs exact versions from the <code>package-lock.json</code>.
-===Yarn===
-[https://yarnpkg.com/en/ Yarn] is an alternative to npm. It caches packages on disk to speed up installs.
-While you can migrate from npm to yarn, it is recommended to stick to a single package manager since they each use their own lockfile.
-===pnpm===
-[https://pnpm.js.org pnpm] uses symlinks to a single copy of each dependency to save disk space.
-pnpm uses its own lockfile instead of packages-lock.json.
-==Useful Packages==
-===fs-extra===
-[https://www.npmjs.com/package/fs-extra fs-extra] adds additional commands for accessing the filesystem such as copying and moving files.
 <syntaxhighlight lang="js">
 const fs = require('fs-extra');
@@ Line 67: / Line 54: @@
 fs.readFileSync('temp.txt', 'utf8');
 </syntaxhighlight>
+==Logging==
+Mostly the same as web JavaScript.<br>
+[https://nodejs.org/api/console.html Reference]
+<syntaxhighlight>
+console.log("a", "b");
+console.error("to stderr");
+</syntaxhighlight>
+=Package Management=
+===NPM===
+To add node packages to an new project. Use <code>npm init</code><br>
+To download the dependencies for a node project, run <code>npm install</code> or <code>npm ci</code>.<br>
+<code>npm install</code> installs the latest dependencies listed in <code>package.json</code> subject to the requirements listed in that file. It also updates <code>package-lock.json</code>.<br>
+<code>npm ci</code> installs exact versions from the <code>package-lock.json</code>.
+===Yarn===
+[https://yarnpkg.com/en/ Yarn] is an alternative to npm. It caches packages on disk to speed up installs.
+While you can migrate from npm to yarn, it is recommended to stick to a single package manager since they each use their own lockfile.
+===pnpm===
+[https://pnpm.js.org pnpm] uses symlinks to a single copy of each dependency to save disk space.
+pnpm uses its own lockfile instead of packages-lock.json.
+=Useful Packages=
+===fs-extra===
+[https://www.npmjs.com/package/fs-extra fs-extra] adds additional commands for accessing the filesystem such as copying and moving files.