By Jon Duckett
THIS publication COVERS:
Basic programming options - assuming no past wisdom of programming past a capability to create an internet web page utilizing HTML & CSS
Core components of the JavaScript language - so that you can the best way to write your personal scripts from scratch
jQuery - in an effort to let you simplify the method of writing scripts (this is brought half-way during the e-book after you have an exceptional realizing of JavaScript)
How to recreate strategies you've gotten obvious on different websites corresponding to sliders, content material filters, shape validation, updating content material utilizing Ajax, and lots more and plenty extra (these examples reveal writing your individual scripts from scratch and the way the speculation you've gotten realized is positioned into practice).
As with our first e-book (the best-selling HTML & CSS: layout and construct Websites), every one chapter:
Breaks matters down into bite-sized chunks with a brand new subject on every one page
Contains transparent descriptions of syntax, every one established with inspiring code samples
Uses diagrams and images to give an explanation for advanced ideas in a visible way
By the top of the e-book, not just will you be capable to use the millions of scripts, JavaScript APIs, and jQuery plugins which are freely on hand on the net, and manage to customise them - additionally, you will be capable of create your personal scripts from scratch.
If you're trying to create extra enriching internet reports, then this is often the booklet for you.
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Extra resources for JavaScript and jQuery: Interactive Front-End Web Development
Example text
When you write JavaScript, you have to tell the interpreter every individual step that you want it to perform. This sometimes involves more detail than you might expect. Think about calculating the area of a wall; in math the area of a rectangle is obtained by multiplying two numbers: width x height = area You may be able to do calculations like this in your head, bu t when writing a script to do this calculation, you need to give the computer very detailed instructions. You might tell it to perform the following four steps in order: 1.
The accelerator makes the car go faster • The brake slows it down Similarly, programs are designed to do different things when users interact with the computer in different ways. For example, clicking on a contact li nk on a web page could bring up a contact form, and entering text into a search box may automatically trigger the search functionality. " @ THE ABC OF PROGRAMMING Scripts often use different events to trigger different types of functionality. So a script will state which events the programmer wants to respond to, and what part of t he script should be run when each of t hose events occur.
When the browser creates a model of a web page, it not only creates a document object , but it also creates a new object for each element on the page. Together these objects are described in the Document Object Model, which you will meet in Chapter 5. com/ lastModified 09/04/2014 15:33:37 Learn JavaScript & jQuery A book that teaches you in a nicer way EVENT happens when: page and assets have finished loading user clicks the mouse over the page , user presses down on a key METHOD what it does: adds new content to the document getElementByld() accesses an element when you state its id attribute HOW A BROWSER SEES A WEB PAGE In order to understand how you can change the content of an HTML page using JavaScript, you need to know how a browser interprets the HTML code and applies styling to it.
