Blank image encoded as data-uri [duplicate]
I looked into it and the smallest possible transparent GIF image, encoded as a data-uri, was this: data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw== which is what I’m using now.
data-uri
How to create a Web Worker from a string
Summary blob: for Chrome 8+, Firefox 6+, Safari 6.0+, Opera 15+ data:application/javascript for Opera 10.60 – 12 eval otherwise (IE 10+) URL.createObjectURL(<Blob blob>) can be used to create a Web worker from a string. The blob can be created using the BlobBuilder API deprecated or the Blob constructor. Demo: http://jsfiddle.net/uqcFM/49/ // URL.createObjectURL window.URL = window.URL … Read more
Send a base64 image in HTML email
Support, unfortunately, is brutal at best. Here’s a post on the topic: Embedded Images in HTML Emails And the post content:
Animated icon in email subject
#Short description: They are referred to internally as goomoji, and they appear to be a non-standard UTF-8 extension. When Gmail encounters one of these characters, it is replaced by the corresponding icon. I wasn’t able to find any documentation on them, but I was able to reverse engineer the format. #What are these icons? Those … Read more
What is Data URI support like in major email client software?
I’ve done a more recent test at Litmus, with data URIs for inline <img> elements and css background images. These desktop clients do show data URIs: Apple Mail 5 Apple Mail 6 Lotus Notes 8 Outlook 2003 Thunderbird 3.0 Thunderbird latest These mobile clients do show data URIs: Android 2.3 Android 4.0 BlackBerry 5 OS … Read more
Drawing an image from a data URL to a canvas
Given a data URL, you can create an image (either on the page or purely in JS) by setting the src of the image to your data URL. For example: var img = new Image; img.src = strDataURI; The drawImage() method of HTML5 Canvas Context lets you copy all or a portion of an image … Read more
Download data URL file
If you also want to give a suggested name to the file (instead of the default ‘download’) you can use the following in Chrome, Firefox and some IE versions: function downloadURI(uri, name) { var link = document.createElement(“a”); link.download = name; link.href = uri; document.body.appendChild(link); link.click(); document.body.removeChild(link); delete link; } And the following example shows it’s … Read more
Is there any way to specify a suggested filename when using data: URI?
Use the download attribute: <a download=’FileName’ href=”https://stackoverflow.com/questions/283956/your_url”> The download attribute works on Chrome, Firefox, Edge, Opera, desktop Safari 10+, iOS Safari 13+, and not IE11.
Is embedding background image data into CSS as Base64 good or bad practice?
It’s not a good idea when you want your images and style information to be cached separately. Also if you encode a large image or a significant number of images in to your css file it will take the browser longer to download the file leaving your site without any of the style information until … Read more