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var viewport = page.getViewport(canvas.width / page.getViewport(1.0).width); because the expression canvas.width / page.getViewport(1.0).width gives us the appropriate scaling factor. You should change the width of your canvas not with css but by the width attribute of the canvas.
The width=device-width part sets the width of the page to follow the screen-width of the device (which will vary depending on the device). The initial-scale=1.0 part sets the initial zoom level when the page is first loaded by the browser. Here is an example of a web page without the viewport meta tag, and the same web page with the viewport ...
30 kwi 2024 · There are several DOM properties that can help you query viewport size, and other similar lengths: The document element's Element.clientWidth is the inner width of a document in CSS pixels, including padding (but not borders, margins, or vertical scrollbars, if present). This is the viewport width.
16 gru 2019 · // get viewport at scale = 1 var viewport = page.getViewport(1); // height of the page var height = viewport.height; // width of the page var width = viewport.width; page . render ( renderContext ) This asynchonous method renders the current page of the PDF on the screen.
Viewport is the browser window size. 1vw = 1% of viewport width. If the viewport is 50cm wide, 1vw is 0.5cm. In addition to resize text and images, it is also common to use media queries in responsive web pages. With media queries you can define completely different styles for different browser sizes.
2 sie 2024 · In this tutorial, I’ll show you how to use it to create a fully fledged custom JavaScript PDF viewer from scratch. 1. Creating a User Interface. We’ll start this JS PDF viewer tutorial by creating a new web page and adding the usual HTML5 boilerplate code to it.
27 wrz 2013 · To determine the width/height of a page, you need to do the following: a. Retrieve the viewport with a scale of 1. b. Call the width property of the viewport. The Code: //We need to pass it a scale for "getViewport" to work. var scale = 1; //Grab the viewport with original scale. var viewport = page.getViewport( 1 ); //Here's the width and height.
