Would it be possible using only JavaScript and HTML to dynamically generate a favicon, using the current page's favicon as a background, and a random number in the foreground?
For example, lets say the current favicon looks similar to this:
======================
====XXXXXXXXXXXXXX====
====X=================
====X=================
====X=====XXXXXXXX====
====X============X====
====X============X====
====XXXXXXXXXXXXXX====
======================
If possible, how would I get it to look something similar to this using only JavaScript and HTML:
======================
====XXXXXXXXXXXXXX====
====X=================
====X=================
====X=====XXXXXXXX====
====X=========--111--=
====X=========--1-1--=
====XXXXXXXXXX----1--=
==============--1111-=
map:=
: white backgroundx
: Original Favicon image-
: Red generated image with a number1
: White text
Ideas:
append('<link id="dynamic-favicon" rel="shortcut icon" href="https://www.XYZ.com/favicon.ico" />'); This works by adding a link to the head of the page, which changes the shortcut icon of the page to the specified image. Causing the image on the tab in the browser to change.
Just Navigate to public Folder in your react project and then remove the file named favicon. ico. Then after you should replace that file with your favorite icon or any png image by renaming it as favicon.
Use an ICO image as a favicon ico . Right-click favicon. ico and select Change Resource. In Change Resource, select an ICO image with the new favicon.
Favicon images are small in size, only 16 pixels in height by 16 pixels in width, so there is not much space for complex designs. Still, a good favicon that is clean, simple and easily identifiable can provide a good visual indicator for visitors navigating to your site through their tabs or bookmarks.
EDIT: Got it working with
var canvas = document.createElement('canvas'); canvas.width = 16;canvas.height = 16; var ctx = canvas.getContext('2d'); var img = new Image(); img.src = '/favicon.ico'; img.onload = function() { ctx.drawImage(img, 0, 0); ctx.fillStyle = "#F00"; ctx.fillRect(10, 7, 6, 8); ctx.fillStyle = '#FFFFFF'; ctx.font = 'bold 10px sans-serif'; ctx.fillText('2', 10, 14); var link = document.createElement('link'); link.type = 'image/x-icon'; link.rel = 'shortcut icon'; link.href = canvas.toDataURL("image/x-icon"); document.getElementsByTagName('head')[0].appendChild(link); }
You can actually run chrome and paste this:
javascript: var canvas = document.createElement('canvas');canvas.width = 16;canvas.height = 16;var ctx = canvas.getContext('2d');var img = new Image();img.src = '/favicon.ico';img.onload = function() {ctx.drawImage(img, 0, 0);ctx.fillStyle = "#F00";ctx.fillRect(10, 7, 6, 8);ctx.fillStyle = '#FFFFFF';ctx.font = 'bold 10px sans-serif';ctx.fillText('2', 10, 14);var link = document.createElement('link');link.type = 'image/x-icon';link.rel = 'shortcut icon';link.href = canvas.toDataURL("image/x-icon");document.getElementsByTagName('head')[0].appendChild(link);}
into the browser and see it in action.
You might take a look at this question, which discusses how to change the favicon dynamically. Also here is a site that claims to play a game in the favicon using only JavaScript, canvas, and the data URI, which should work in all modern browsers except IE. Not sure if that would fulfill your requirements or not, but you can try reverse engineering how it works.
Here's an SO answer that explains how to use the canvas element to read the favicon data and get the image data out, which then can be modified and composed into a new icon.
I don't know about doing it all in the browser, but it would be easy to have a server endpoint that accepted parameters in the URL and returned a composed favicon. Then Javascript could modify the favicon url to get the image it wanted.
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