From 8822b0a6fde54910131ec48e0c09f720ee74d6f7 Mon Sep 17 00:00:00 2001
From: Sascha Schulz <sschulz@dh-software.de>
Date: Do, 17 Aug 2023 16:49:06 +0200
Subject: [PATCH] Merge branch 'draft'
---
index.html | 194 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 193 insertions(+), 1 deletions(-)
diff --git a/index.html b/index.html
index d31dd79..c224439 100644
--- a/index.html
+++ b/index.html
@@ -2604,6 +2604,198 @@
</code>
</pre>
</section>
+ <section>
+ <h3>Strings</h3>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const empty1 = "";
+ const empty1 = '';
+
+ const s1 = 'abc';
+ const s2 = "abc";
+
+ const s3 = 'a"b"c';
+ const s4 = "a\"b\"c";
+
+ const s5 = 'a\'b\'c';
+ const s6 = "a'b'c";
+
+ const s7 = `a'b'"c"`;
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Strings zusammenfügen</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const age = 10;
+
+ // Konkatenation
+ const s = "My age is " + number + "!";
+
+ // Interpolation
+ const s = `My age is ${number}!`;
+
+ // => "My age is 10!"
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Template Strings</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ function sayHello() {
+ return "Hello";
+ }
+
+ let interpolation = `${sayHello()}`;
+
+ // => "Hello"
+
+ interpolation = `5 + 5 = ${5+5}`;
+
+ // => "5 + 5 = 10"
+ </code>
+ </pre>
+ </section>
+ <section>
+ lit
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ return html`<div>hello world!</div>`
+ </code>
+ </pre>
+ </section>
+ <section>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ function myTag() {
+ console.log(arguments);
+
+ // return 5;
+ // return true;
+ return "abc";
+ }
+
+ let interpolation = myTag`a ${5} b ${6} c`;
+
+ // => "abc"
+ </code>
+ </pre>
+ <pre>
+ <code class="bash" data-trim data-line-numbers>
+ Arguments(3) [Array(3), 5, 6]
+ 0 : (3) ['a ', ' b ', ' c', raw: Array(3)]
+ 1 : 5
+ 2 : 6
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Aufgabe</h5>
+ <p>Schreibe ein Tag, welches die Zahlen aus den dynamischen Ausdrücken zusammenrechnet (<code>strings.js</code>)</p>
+ </section>
+ <section>
+ <h5>Lösung</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ function add(parts, ...numbers) {
+ return numbers.reduce((p, c) => p + c, 0);
+ }
+
+ let sum = add`a ${5} b ${6} c`;
+
+ console.log(sum);
+
+ // => 11
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Rest-Operator</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ function add(...numbers) {
+ return numbers.reduce((p, c) => p + c, 0);
+ }
+
+ add(1, 2, 3); // => 6
+ </code>
+ </pre>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const o1 = {a: 1, b: 2};
+ const o2 = {x: 5, y: 6, ...o1};
+ </code>
+ </pre>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ const a1 = [4, 5, 6];
+ const a2 = [1, 2, 3, ...a1];
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h3>Relevante Browser-APIs</h3>
+ </section>
+ <section>
+ <h5>window</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ window.innerWidth; // innere Auflösung des sichtbaren Fensters
+ window.innerHeight;
+ window.outerWidth; // äußere Auflösung des Browserfensters inklusive Adresszeile usw.
+ window.outerHeight;
+
+ window.addEventListener(); // Events an das äußerste "Dach"-Element hängen
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>location</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ location.href; // aktuelle URL
+ location.host; // aktuelle Domain, z.B. "www.google.de"
+ location.protocol; // aktuelles Protokoll, z.B. "https:"
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Navigator</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ navigator.language; // bevorzugte Browsersprache, z.B. "de"
+ navigator.userAgent; // z.B. "Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) [...]"
+ navigator
+ .mediaDevices
+ .getDisplayMedia(); // Fordere Erlaubis zum Streamen von Anwendungen oder Bildschirmen an
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>Document</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ document.body; // <body>-Element der Seite
+ document.activeElement; // aktives Element der Seite, welche gerade den Fokus besitzt
+ document.cookie; // für die aktuelle Seite gesetzte Cookies
+ document.execCommand("copy"); // Texte in die Zwischenablage zu schreiben
+ document.createElement("div"); // erzeuge neues DOM-Element mit angegebenen Tag
+ </code>
+ </pre>
+ </section>
+ <section>
+ <h5>LocalStorage</h5>
+ <pre>
+ <code class="js" data-trim data-line-numbers>
+ // auf 5MB Daten pro Domain begrenzt
+ localStorage.getItem(key); // Element holen
+ localStorage.setItem(key, value); // Element setzen
+ localStorage.removeItem(key); // Element entfernen
+ </code>
+ </pre>
+ </section>
</section>
</div>
</div>
@@ -2620,7 +2812,7 @@
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+
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