awesome-cheatsheets/backend/express.js

/* *******************************************************************************************
 * API
 * http://expressjs.com/en/api.html
 * ******************************************************************************************* */

const express = require("express"); // Importing the express library.
const app = express(); // Intializing the imported express application

/* *******************************************************************************************
 * GLOBAL OBJECTS
 * http://expressjs.com/en/api.html#express.json
 * ******************************************************************************************* */

```Methods```;

express.json([options]);

options: `
inflate                   // to manage the deflated bodies like enabling and disabling

limit                     // Controls the maximum request body size.

reviver                   // It is passed directly to JSON.parse as an second argument

type                      // This is used to determine the type of middleware will parse

verify                    // It is an undefined function which used to verify the middleware parsing.

`;

express.raw([options]);

options: `
inflate                   // to manage the deflated bodies like enabling and disabling

limit                     // Controls the maximum request body size.

type                      // This is used to determine the type of middleware will parse

verify                    // It is an undefined function which used to verify the middleware parsing.
`;

express.Router([options]);

options: `
caseSensitive             //Enables case sensitivity

mergeParams               //if param names of child and parent are conflicted then the child takes the precedence

strict                    // Enables Strict routing
`;

express.static(root, [options]);

options: `
dotfiles                 // determines how dotfiles are used

etag                     // Operates etag generation

extensions               // Operates file extension fallback

fallthrough              //	Enable or disable the immutable directive in the Cache-Control response header

index                    // sends the specified directory index file

LastModified             // sets the Last-Modified header to the last modified date

setHeaders               // Function for setting HTTP headers to serve with the file
`;

express.text([options]);

options: `
defaultCharset          // Sets the default charset for the text context.

inflate                 // to manage the deflated bodies like enabling and disabling

limit                   // Controls the maximum request body size.

type                    // This is used to determine the type of middleware will parse

verify                  // It is an undefined function which used to verify the middleware parsing.
`;

express.urlencoded([options]);

options: `
extended                // it allows to choose between parsing the URL-encoded data or the qs library

parameterLimit          // It controls the no of params.

inflate                 // to manage the deflated bodies like enabling and disabling

limit                   // Controls the maximum request body size.

type                    // This is used to determine the type of middleware will parse

verify                  // It is an undefined function which used to verify the middleware parsing.
`;

```Application`````;
Properties```app.local`;

`app.locals.title = "My Cheatsheet";

console.dir(app.locals.title)`;

app.mountpath`

``app.mountpath``const admin = express()`;