![]() ![]() It appeared as XMLHTTP in the second version of the MSXML library, which shipped with Internet Explorer 5.0 in March 1999. In 1998, the Microsoft Outlook Web Access team developed the concept behind the XMLHttpRequest scripting object. ![]() In 1996, the iframe tag was introduced by Internet Explorer like the object element, it can load or fetch content asynchronously. This placed additional load on the server and made bandwidth a limiting factor in performance. ![]() Each time the browser reloaded a page because of a partial change, all the content had to be re-sent, even though only some of the information had changed. This process was inefficient, as reflected by the user experience: all page content disappeared, then the new page appeared. Each user action required a complete new page to be loaded from the server. In the early-to-mid 1990s, most Websites were based on complete HTML pages. Instead, it is existing technologies used in a new way. Ajax is not a new technology, nor is it a new language. The built-in XMLHttpRequest object is used to execute Ajax on webpages, allowing websites to load content onto the screen without refreshing the page. The webpage can be modified by JavaScript to dynamically display-and allow the user to interact with the new information. HTML and CSS can be used in combination to mark up and style information. In practice, modern implementations commonly utilize JSON instead of XML.Ījax is not a technology, but rather a programming concept. By decoupling the data interchange layer from the presentation layer, Ajax allows web pages and, by extension, web applications, to change content dynamically without the need to reload the entire page. With Ajax, web applications can send and retrieve data from a server asynchronously (in the background) without interfering with the display and behaviour of the existing page. The dialog box talks about creating PDF bookmarks using ‘Headings’.Ajax (also AJAX / ˈ eɪ dʒ æ k s/ short for " Asynchronous JavaScript and XML") is a set of web development techniques that uses various web technologies on the client-side to create asynchronous web applications. One example is the options available when saving to the PDF format. Headings don’t necessarily have an outline level (but they usually will).Ĭonfusion arises because Microsoft uses the term ‘Headings’ when they should say ‘Outline Level’.Outline Levels don’t have to be headings.‘Heading 1’ style has outline level 1, ‘Heading 2’ style has outline level 2 and so on. The in-built Heading styles are linked to matching outline levels. It’s better known as the Navigation Pane or Outline View. Outline Levels are Word’s way of organizing a document into the ‘tree’ structure that Microsoft calls an ‘interactive outline’. When making the custom heading styles, setting the Outline Level is often (and understandably) overlooked.Īccording to Microsoft you can apply ‘Heading’ styles to fill in the Navigation Pane – but that’s not entirely true. This problem is most likely to happen if you’ve created custom heading styles and by-passed the in-built ‘Heading n’ styles. A Table of Contents can be built without the essential part of the Navigation Pane – the Outline Level. So they should also appear in the Navigation Pane too? The document has headings, you can see them in the Table of Contents on right. ![]() Normally the Table of Contents and Navigation Pane are almost the same. ![]()
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