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JavaScript

JavaScript. Katie Fowle November 15, 2011. History. Brendan Eich at Netscape, 1995 Need for interactivity in web pages Mocha, LiveWire , LiveScript , then JavaScript Not taken seriously at first Called “beginner’s language” or “toy”. Brendan Eich CTO, Mozilla Corporation .

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JavaScript

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  1. JavaScript Katie Fowle November 15, 2011

  2. History • Brendan Eich at Netscape, 1995 • Need for interactivity in web pages • Mocha, LiveWire, LiveScript, then JavaScript • Not taken seriously at first • Called “beginner’s language” or “toy” Brendan Eich CTO, Mozilla Corporation

  3. Quote from the Creator “JS had to “look like Java” only less so, [it had to] be Java’s dumb kid brother or boy-hostage sidekick. Plus, I had to be done in ten days or something worse than JS would have happened”

  4. The Language • Primary use is Web page enhancement • Integrated into the browser • Interpreted • Weakly Typed • Latest Version 1.8.5

  5. JavaScript NOT Java Similarities Differences • C- style syntax • Object-Oriented • Key words • Standard Library naming conventions • Math and Date objects • Scripting languge • Some functional features • Weakly typed • Loaded as source code • Prototype-based

  6. Web Uses • Form validation • Event handling • User interaction • alert(), confirm(), prompt() • Dynamic content

  7. Data Types • Primitive types • Numeric, string, boolean • Objects • Built in: Object, Date, Array, Math, Function, RegExp, Number, String, and Boolean

  8. Object() constructor

  9. Literal notation

  10. Custom Constructor

  11. Evaluation • Readability • Writability • Reliability • Cost

  12. Cool Uses • http://www.1stwebdesigner.com/freebies/examples-html5-javascript-uses/ • http://www.kriesi.at/archives/50-websites-that-make-amazing-use-of-javascript

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