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Always check the Console Window first when something goes wrong.
We can also create our own messages for display in the Console Window. This object provides a few functions for manipulating and accessing the Console Window, but for our purposes here the console.
This function displays a single line of text on the next available line in the Console Window.
Adobe added Console Window support to Reader in version 7. However, setting up Reader to actually display the Console Window was very difficult. It required installing special scripts and manually changing Acrobat settings in either the Windows Registry or the Macintosh settings files.
It has become much easier in Reader XI.
There is only one thing you need to be able to do to use the Console Window, and that is to display it. Displaying the Console Window in Reader is a bit more difficult than one might think it should. Reader does not have the keyboard shortcut, a menu item, or a tool button for displaying the Debugger Window. This leaves only two options: create your own tool button or menu item or cause a deliberate error.
This option is fine for basic debugging, i.
Or for viewing messages that aren't errors? One solution is to deliberately throw an error by placing this code in some strategic location, such as a document or button script.
But it isn't the best method.
A better technique is to create a tool button or menu item that displays the console directly with the "console. JS is of help. Almost everything in PDF. JS is done asynchronously — from loading the PDF file to loading individual pages to rendering pages. This means that return from such asynchronous operations have to be handled through callbacks. Now PDF.
JS does not use normal callbacks, it uses Promises. Promises and callbacks do almost the same thing, but Promises helps in writing cleaner code. Instead of writing callbacks such as success or error here and there in your code, you just chain the various callbacks involved by a then for success or catch for error.
Coming back to PDF.
JS, it returns a Promise variable on each asynchronous operation request. When the asynchronous operation is completed, the Promise involved receives a parameter in the callback function. JS APIs work in this way.
When you include the script files of PDF.
This object provides a number of APIs that you can call in your Javscript code. You can also pass binary data as a parameter.
If you have a base encoded data, you can convert it to a binary string through atob function. Note that this function just loads the page, and not renders the page on the screen.They were already available.
Table of contents
Data types. Resource loading: Form submission: Thank you! The tutorial was recently rewritten from scratch. Lookbehinds, a new feature, use? This area is also used to show the Script window for displaying runtime code when the debugger tools are enabled.
The structure for placing pages rendered as Canvas elements is quite simple.