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Updated Frequently Asked Questions (markdown)

Yury Delendik 2017-04-21 18:21:52 -05:00
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Frequently-Asked-Questions.md

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* [I know that my PDFs are corrupted. Will PDF.js attempt to display it?](#corrupted-pdf)
* [I have a really great idea. Where is the best place to record it?](#idea)
* [I'm developing a custom solution based on PDF.js core library. Can you help me?](#custom)
* [I want to render all 100 pages in a document at high resolution. Is it a good idea?](#allthepages)
* [I want to render all 100 pages in a document at high resolution. Is it a good idea?](#allthepages)
* [PDF.js is fetching entire PDF file from a server. Can it fetch only its portion?](#range)
* [What is a latest stable version of PDF.js?](#version)
* [What types of PDF files are slow in PDF.js? Can I optimize a PDF file to make PDF.js faster?](#optimize)
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The demo viewer creates, renders, and holds canvases only for visible pages to reduce amount of used memory. Our recommendation is to create and render only visible pages.
<a name="range"></a>
## PDF.js is fetching entire PDF file from a server. Can it fetch only its portion?
Actually PDF.js is doing just that. The PDF is a complicated format;in most of the cases, vital data of a PDF document is located at the end. Depending on [browser support](#faq-support) and on what web server returns in the [HTTP Range Requests headers](https://tools.ietf.org/html/rfc7233), the PDF.js automatically may start using HTTP Range Requests to fetch not-yet-loaded portions of a PDF needed for rendering of visible pages, so a document can be rendered without fully loading it.
<a name="version"></a>
## What is a latest stable version of PDF.js?