Différences

Ci-dessous, les différences entre deux révisions de la page.

--- kb_it:nodejs [2022/01/07 03:04] – ↷ Page déplacée de wiki:kb_it:nodejs à kb_it:nodejs befe
+++ kb_it:nodejs [2022/11/19 16:31] (Version actuelle) – befe
@@ Ligne 2: / Ligne 2: @@
 ===== npm =====
+==== Initialisation d'un projet express.js ====
+Source : https://dev.to/nyctonio/how-to-make-a-typescript-nodejs-express-project-with-eslint-ejs-and-nodemon-hot-reload-4e0b
+<code bash>
+yarn init -y
+yarn add -D eslint @types/node @types/express typescript ts-node-dev
+mkdir src
+touch src/app.ts
+</code>
+src/app.ts :
+<code javascript>
+import express from 'express';
+const app = express();
+const port = 3000;
+app.use(express.json());
+app.use(express.static("public"));
+app.set("view engine", "ejs");
+app.get('/', (req, res) => {
+  res.send('Hello World !');
+});
+app.listen(port, () => {
+  return console.log(`http://localhost:${port}`);
+});
+</code>
+<code bash>
+touch tsconfig.json
+</code>
+tsconfig.json :
+<code json>
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "target": "es6",
+    "moduleResolution": "node",
+    "sourceMap": true,
+    "outDir": "dist"
+  },
+  "lib": [
+    "es2015"
+  ]
+}
+</code>
+<code bash>
+yarn eslint --init
+</code>
+package.json :
+<code json>
+{
+  "name": "app",
+  "version": "1.0.0",
+  "description": "",
+  "keywords": [],
+  "author": "",
+  "license": "MIT",
+  "main": "dist/app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "lint": "eslint . --ext .ts",
+    "start": "ts-node-dev src/app.ts"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.14",
+    "@types/node": "^18.11.9",
+    "@typescript-eslint/eslint-plugin": "^5.43.0",
+    "@typescript-eslint/parser": "^5.43.0",
+    "eslint": "^8.28.0",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^4.9.3"
+  },
+  "dependencies": {
+    "ejs": "^3.1.8",
+    "express": "^4.18.2"
+  }
+}
+</code>
+<code bash>
+yarn start
+</code>
 ==== Commandes utiles ====
@@ Ligne 25: / Ligne 114: @@
 git ls-remote https://exemple.com/user/repo
 npm install git+https://exemple.com/user/repo
+</code>
+=== Ecriture d'un module avec mise en cache de données ===
+<code javascript>
+import fs from 'node:fs';
+let isDockerCached;
+function hasDockerEnv() {
+	try {
+		fs.statSync('/.dockerenv');
+		return true;
+	} catch {
+		return false;
+	}
+}
+function hasDockerCGroup() {
+	try {
+		return fs.readFileSync('/proc/self/cgroup', 'utf8').includes('docker');
+	} catch {
+		return false;
+	}
+}
+export default function isDocker() {
+	// TODO: Use `??=` when targeting Node.js 16.
+	if (isDockerCached === undefined) {
+		isDockerCached = hasDockerEnv() || hasDockerCGroup();
+	}
+	return isDockerCached;
+}
 </code>