From 28563b57efe49cc9869ed3bc5d3fd3a6a73afcce Mon Sep 17 00:00:00 2001
From: Sascha Schulz <sschulz@dh-software.de>
Date: Mo, 10 Jun 2024 16:22:01 +0200
Subject: [PATCH] add nodejs intro
---
assets/images/node-js.svg | 3 +
index.html | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++
assets/drawio/node-js.drawio | 1
3 files changed, 160 insertions(+), 1 deletions(-)
diff --git a/assets/drawio/node-js.drawio b/assets/drawio/node-js.drawio
new file mode 100644
index 0000000..dcedbc4
--- /dev/null
+++ b/assets/drawio/node-js.drawio
@@ -0,0 +1 @@
+<mxfile host="Electron" modified="2024-06-10T10:49:28.466Z" agent="5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/16.1.2 Chrome/96.0.4664.55 Electron/16.0.5 Safari/537.36" etag="VYc41megkdlq9GIItywG" version="16.1.2" type="device"><diagram id="ERSdXdGp_mw-8WpFkcub" name="Page-1">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</diagram></mxfile>
\ No newline at end of file
diff --git a/assets/images/node-js.svg b/assets/images/node-js.svg
new file mode 100644
index 0000000..9e6b508
--- /dev/null
+++ b/assets/images/node-js.svg
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="802px" height="502px" viewBox="-0.5 -0.5 802 502"><defs/><g><rect x="10" y="10" width="360" height="480" fill="rgb(42, 42, 42)" stroke="rgb(240, 240, 240)" stroke-width="2" pointer-events="all"/><rect x="130" y="10" width="120" height="60" fill="none" stroke="none" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(2)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 20px; margin-left: 66px;"><div data-drawio-colors="color: rgb(240, 240, 240); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(240, 240, 240); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">Chromium</div></div></div></foreignObject><text x="95" y="24" fill="rgb(240, 240, 240)" font-family="Helvetica" font-size="12px" text-anchor="middle">Chromium</text></switch></g><rect x="30" y="140" width="320" height="110" fill="rgb(42, 42, 42)" stroke="rgb(240, 240, 240)" stroke-width="2" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(2)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 98px; margin-left: 16px;"><div data-drawio-colors="color: rgb(240, 240, 240); " style="box-sizing: border-box; font-size: 0px; text-align: center;"><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(240, 240, 240); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">Render-Engine<br />(HTML + CSS)</div></div></div></foreignObject><text x="95" y="101" fill="rgb(240, 240, 240)" font-family="Helvetica" font-size="12px" text-anchor="middle">Render-Engine...</text></switch></g><rect x="30" y="70" width="320" height="40" fill="rgb(42, 42, 42)" stroke="rgb(240, 240, 240)" stroke-width="2" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(2)"><switch><foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 158px; height: 1px; padding-top: 45px; margin-left: 16px;"><div data-drawio-colors="color: rgb(240, 240, 240); " style="box-sizing: border-box; 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diff --git a/index.html b/index.html
index 72434b9..a80829f 100644
--- a/index.html
+++ b/index.html
@@ -3965,7 +3965,162 @@
</section>
<section>
<section>
-
+ <h2>NodeJS</h2>
+ </section>
+ <section>
+ <h3>Was ist NodeJS?</h3>
+ <ul>
+ <li class="fragment">"JavaScript auf dem Server"</li>
+ <li class="fragment">basiert auf der V8-Engine von Google</li>
+ <li class="fragment">Laufzeitumgebung für JavaScript mit eigener API</li>
+ </ul>
+ </section>
+ <section>
+ <img data-src="/assets/images/node-js.svg">
+ </section>
+ <section>
+ <h3>Überblick über die Node-API</h3>
+ <p>Die API ist in viele verschiedene Module aufgeteilt</p>
+ <table>
+ <tr><td>fs</td><td>Dateisystem</td></tr>
+ <tr><td>crypto</td><td>Kryptografie</td></tr>
+ <tr><td>zlib</td><td>Datenkompression</td></tr>
+ <tr><td>http</td><td>Webserver</td></tr>
+ <tr><td>net</td><td>Netzwerk (TCP)</td></tr>
+ <tr><td>tls</td><td>Verschlüsseltes Netzwerk (TCP)</td></tr>
+ </table>
+ </section>
+ <section>
+ <p>Aufruf eines Programmes in der Kommandozeile</p>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ node [Node-Parameter] path/to/script.js [Anwendungsparameter]
+ </code>
+ </pre>
+ <p>z.B.</p>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ node --inspect index.js --port 3000
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Einbinden von Modulen</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const fs = require("fs");
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Aufbau eines Moduls</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ module.exports = {
+ foo: 5,
+ sayHello: function(name) {
+ return "Hello " + name + "!";
+ }
+ }
+ </code>
+ </pre>
+ <p>oder</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ exports.foo = 5;
+ exports.sayHello = function(name) {
+ return "Hello " + name + "!";
+ };
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Aufgabe</p>
+ <p>Schreibe ein Modul, welches eine <code>Square</code>-Klasse zur Verfügung stellt, mit welchem man den Umfang und den Flächeninhalt eines Rechtecks berechnen kann:</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const Square = require("./square");
+
+ const square = new Square(2, 3);
+
+ console.log(square.getArea()); // => 6
+ console.log(square.getPerimeter()); // => 10
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h3>Module für die Kommandozeile</h3>
+ <p>package.json</p>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ npm init -y
+ </code>
+ </pre>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ {
+ ...
+ "bin": {
+ "my-command": "./index.js"
+ }
+ }
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>index.js</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ #! /usr/bin/env node
+
+ console.log("Hello world from the command line!");
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Installation</p>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ npm install -g path/to/project
+ </code>
+ </pre>
+ z.B.
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ npm install -g .
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Ausführung</p>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ my-command
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Kommandozeilenparameter</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ console.log(process.argv);
+ </code>
+ </pre>
+ <p>angelehnt an die Parameter aus der Programmiersprache <code>c</code>:</p>
+ <pre>
+ <code class="c" data-trim data-line-numbers>
+ int main(int argc, char *argv[])
+ </code>
+ </pre>
+ </section>
+ <section>
+ <p>Aufgabe</p>
+ <p>Mache das vorherige Programm für die Konsole aufrufbar, sodass die Länge und Breite für das Rechteck per Konsolenargumente übergeben werden können und der Flächeninhalt ausgegeben wird:</p>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ my-command 2 3
+ </code>
+ </pre>
</section>
</section>
</div>
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