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--- notes:javascript_cheat_sheet [2026/09/15 02:14]
175.110.189.154 old revision restored (2026/08/03 07:06)
+++ notes:javascript_cheat_sheet [2026/09/16 11:40] (current)
216.73.216.94 old revision restored (2026/09/15 03:51)
@@ Line 1: / Line 1: @@
 ===== Javascript Cheat Sheet =====
-This is a summarized form of the [[http://www.w3schools.com/js/default.asp | Javascript Tutorial]].
+This is a summarized form of the [[http://www.w3schools.com/js/default.asp | JavaScript Tutorial]].
-For reference Javascript specifications can be found [[http://developer.mozilla.org/en/JavaScript_Language_Resources | here]] .
+For reference JavaScript specifications can be found [[http://developer.mozilla.org/en/JavaScript_Language_Resources | here]] .
 ==== What is Javascript ====
   * JavaScript is the most popular scripting language on the internet and works in all major browsers.
+  * It is a lightweight, interpreted language that is embedded into webpages to add interactivity.
+  * JavaScript can read and write HTML page elements, react to events, validate data, create cookies.
+  * JavaScript was invented by Brendan Eich of Netscape but is now known officially as ECMAScript (current version is ECMA-262).
+  * A simple "Hello World" example <code html>
+<script type="text/javascript">
+<!--
+document.write("Hello World!");
+//-->
+</script> </code>
+  * JavaScript code may be located
+    * In the head - executed when called
+    * In the body - executed while loading
+    * In an external file called from either the head or the body e.g. <script src="abc.js"></script>
+==== Basic Syntax ====
+  * JavaScript is case-sensitive.
+  * Statements may omit the final semi-colon but should not.
+  * Blocks may be grouped together using curly braces { }.
+  * JavaScript uses java-style comments: // and /* */.
+  * JavaScript variables are case-sensitive and must begin with a letter or underscore.
+  * Variables are automatically declared when first used but should be explicitly declared using e.g. var a = 5;
+  * JavaScript uses standard C/Java operators e.g. +-*/%, ++, +=, &&, ||, !, + (concatenation).
+  * JavaScript uses C/Java comparators >,>=,==, !=, a?b:c. It also uses === to test equality of value and type.
+==== Basic Structures ====
+  *

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