By Nick Morgan
ISBN-10: 1593274084
ISBN-13: 9781593274085
JavaScript is the programming language of the net, the key sauce that makes the internet extraordinary, your favourite websites interactive, and on-line video games fun!
JavaScript for children is a lighthearted advent that teaches programming necessities via sufferer, step by step examples paired with humorous illustrations. You’ll start with the fundamentals, like operating with strings, arrays, and loops, after which circulation directly to extra complicated subject matters, like construction interactivity with jQuery and drawing pictures with Canvas.
Along the best way, you’ll write video games similar to locate the Buried Treasure, Hangman, and Snake. You’ll additionally find out how to:
Create services to arrange and reuse your code
Write and regulate HTML to create dynamic internet pages
Use the DOM and jQuery to make your web content react to consumer input
Use the Canvas point to attract and animate graphics
application actual user-controlled video games with collision detection and ranking keeping
With visible examples like bouncing balls, lively bees, and racing vehicles, you could rather see what you’re programming. each one bankruptcy builds at the final, and programming demanding situations on the finish of every bankruptcy will stretch your mind and encourage your personal extraordinary courses. Make anything cool with JavaScript today!
Ages 10+ (and their parents!)
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Extra resources for JavaScript for Kids: A Playful Introduction to Programming
Example text
You only have to visit a couple of websites to see why JavaScript is so exciting. • JavaScript lets you play music and create amazing visual effects. com/), as shown in Figure 1-1. • JavaScript lets you build tools for others to make their own art. com/) is a kind of virtual “drum machine” that creates all kinds of cool noises—and cool animations to go along with them—as shown in Figure 1-2. 4 Chapter 1 Figure 1-1: You control the flashing cursor in HelloEnjoy’s “Lights” music video. Figure 1-2: When you visit Patatap, try pressing a bunch of keys to make different noises!
Let’s try something harder. What’s 12,345 plus 56,789? 12345 + 56789; 69134 That’s not so easy to work out in your head, but JavaScript calculated it in no time. You can add multiple numbers with multiple plus signs: 22 + 33 + 44; 99 JavaScript can also do subtraction . . 1000 - 17; 983 and multiplication, using an asterisk . . 123 * 456; 56088 and division, using a forward slash . . 25 Here it gets a bit tricky, because the result of this calculation (the answer) will depend on the order that JavaScript does Data Types and Variables 15 1234 + 57 * 3 - 31 / 4 each operation.
When we ask for the value secondsInADay at u, we get 86400, which is the number of seconds in a day. var hoursInADay = 24; var secondsInADay = secondsInAnHour * hoursInADay; u secondsInADay; 86400 Seconds in a Year Finally, we create the variables daysInAYear and secondsInAYear. The daysInAYear variable is assigned the value 365, and the variable secondsInAYear is assigned the value of secondsInADay multiplied by daysInAYear. Finally, we ask for the value of secondsInAYear, which is 31536000 (more than 31 million)!
JavaScript for Kids: A Playful Introduction to Programming by Nick Morgan
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