Accelerate the way you Recognize PDF Form Field on Server Gratuito

there are a few basic operations and concepts that pervade all formfield scripting in Acrobat JavaScript you will see and use these in every script that has to do with form fields in Acrobat JavaScript each individual form field is represented by its own form field object the form field object contains properties and functions that we can use to analyze and control the form field so to use a form field in a script we have to first acquire its associated form field object to do this we use the get field function but before getting into the details of this let's take one step back in our perspective form fields are elements on a PDF document in the PDF document also has an Associated object as discussed in an earlier video this is a pattern in any JavaScript environment every element of interest has an Associated object that provides us with properties and functions to analyze and control that element this slide is divided into two sections the left-hand side represents the Acrobat viewer and inside the viewer we see PDF documents and on those documents are PDF elements like form fields the right-hand side represents the JavaScript perspective the view from the scripting world since form fields are inside of a PDF document from the JavaScript perspective form field objects are inside of the document object and that's where we always start with the document object javascript in almost all situations we use the this keyword to get the document object this isn't always true in core JavaScript that this keyword represents the current object and of course there are situations where the current object is not the document but for the vast majority of scripting situations within the Acrobat JavaScript environment the this keyword is the document object let's examine this a bit more closely for scripts that are inside of a document the keyword this always refers to that document the document the script is inside of even if that document is not the document currently visible to the user so it's not the users current document but it is the scripts current document in scripts that are outside of the document like scripts that run from the console window or within automation scripts that run from a toolbar button or from a menu item the this keyword refers to the PDF document that is currently being viewed by the user so we have two situations scripts inside the PDF and scripts outside the PDF where the this keyword has a slightly different application but it means the same thing and of course there are other ways to get a document object various functions like the one for opening a PDF returns the document object but these are much more advanced topics and won't be discussed in this video series for our purposes here we can think of the this keyword as being the document object everything about the PDF is accessed through the document object now back to fields we acquire the field object from the get field function which is a member of the document object...