The javascript anthology 101 essential tips tricks hacks - phần 4 potx

... for de- velopers to learn how to use them properly. They can be very useful for highlight- ing logical errors, and valuable as learning tools in their own right, but they’re limited in their ... with browser incompatibilities: they’re only useful there if the bug you’re looking for is in the browser that the debugger supports! Strict Warnings If you open the JavaScript console in Fi...

Ngày tải lên: 13/08/2014, 08:21

... you’ve enjoyed these chapters from The JavaScript Anthology: 101 Tips, Tricks & Hacks, why not order yourself a copy? The JavaScript Anthology: 101 Tips, Tricks & Hacks is the ultimate ... keys accessible drag-and-drop functional- ity, 40 0 accessible slider control, 43 3 drop-down menus and, 508 key codes for, 42 4 keyboard accessible menus and, 391, 41 1...

Ngày tải lên: 13/08/2014, 09:20

... to Ordinals (-st, -nd, -rd, -th) 42 Summary 43 3. Working with Strings 45 Including a Special Character in a String 45 Transforming the Character Case of a String 47 Encoding a URL 47 Comparing ... pages! The JavaScript Anthology 101 Essential Tips, Tricks & Hacks (4 Chapter Sample) Thank you for downloading this four-chapter sample of James Edwards’s and...

Ngày tải lên: 13/08/2014, 08:21

... to another file: and the Sony PSP, as well as legacy JavaScript browsers such as Opera 5 and Netscape 4. The last point in the list above is arguably the least likely (apart from other de- velopers ... 539 Optimizing Loops 542 Avoiding eval 543 Avoiding Strict Warnings 544 Optimizing for a Particular Browser 545 Writing Scripts Using Less Code 548 Dividing Tasks into Functions...

Ngày tải lên: 13/08/2014, 08:21

... external JavaScript file named what-is -javascript. js. The file should contain the code that you would otherwise put inside the script element, like this: File: what-is -javascript. js function saySomething(message) { ... kind of event-driven script. 5 This technique was pioneered by Simon Willison [http://www.sitepoint.com/blogs/20 04/ 05/26/closures-and-executing -javascript- on-p...

Ngày tải lên: 13/08/2014, 08:21

... pixels, then across by 200 pixels, then to a point that’s 300 pixels from the left and 100 pixels from the top, then back to the top corner. Getting the Viewport Size (the Available Space inside the ... available, the script can trigger a click event handler that passes its href to the makePopup function, along with the other settings. The return value of the handler depe...

Ngày tải lên: 13/08/2014, 09:20

... "click", engage, false); 4 http://www.sitepoint.com/blogs/20 04/ 05/26/closures-and-executing -javascript- on-page-load/ 235Order the print version of this book to get all 588 pages! The W3C Way (Event ... browsers; the while loop then finds the first non-text-node parent if the target reported by the browser happens to be a text node. If we want to retrieve the elem...

Ngày tải lên: 13/08/2014, 09:20

... Explorer, though they measure the distance from the mouse cursor to the edges of the browser window. In order to find the position of the cursor relative to the entire page, we need to add the current ... we check whether the cursor position plus the size of the layer is greater than the viewport size (minus an allowance for scrollbars). If part of the layer is going...

Ngày tải lên: 13/08/2014, 09:20

... and, 45 4 problems with dynamic content, 390, 44 2, 44 4, 45 3 products listed, 43 6 reading label text, 44 1 remote scripting and, 44 6 scripting support, 388, 43 7 44 9 simulating the user experience, 43 6 suggested ... module, 46 1 46 2 JAWS screen reader, 44 1, 44 4, 44 8, 45 1, 45 5 join method, 71 JSON (JavaScript Object Notation) format, 48 1 K keyboard accessibility...

Ngày tải lên: 13/08/2014, 09:20

... loads an external JavaScript file named what-is -javascript. js. The file should contain the code that you would otherwise put inside the script element, like this: File: what-is -javascript. js function ... 135 Getting the Scrolling Position 137 Making the Page Scroll to a Particular Position 140 Getting the Viewport Size (the Available Space inside the Win- dow) 141 Summa...

Ngày tải lên: 08/03/2014, 20:20