Show HN: Zany – Favicon API

30 points by jchap 2 years ago | 11 comments

Got mad at this console error the other night: "Failed to load resource: the server responded with a status of 404 (File not found) :8000/favicon.ico:1" and hacked this together. Never have to worry about that 16x16 square again.

modec 2 years ago |

Or you can get a emoji as favicon with:

myfonj 2 years ago | |

Yup. My last "golfing" take was to use default font-size and fit viewBox accordingly:

    data:text/html;charset=utf-8,<link rel=icon href='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="1,-15,19,19"><text>%F0%9F%A6%84</text></svg>'>

But haven't tested outside Windows, so it will be most probably off in some browsers (Safari?).

Or this funky quine document with same unicorn emoji that rotates or fades depending on prefers-reduced-motion:

    data:text/html;charset=utf-8,<!doctype html>%0A<link rel=icon href='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="1,-15,19,19"><text transform-origin="10 -3">%F0%9F%A6%84</text><style>@keyframes x{to{transform:rotate(1turn)}}@keyframes y{to{opacity:0}}text{animation:2s x infinite alternate}@media(prefers-reduced-motion){text{animation-name:y}}</style></svg>'>%0A<title>Animated favicon affected by `prefers-reduced-motion` media query, embedded in datauri inside datauri document</title>%0A<style>:not(style,script){display:block; padding:0 .2em; background:darkslategray; color:snow; white-space:pre-wrap} title::after{content:' (in `' var(--prm) '` mode)'}html{--prm:'no-preference'}@media(prefers-reduced-motion:reduce){html{--prm:'reduce'}}</style>%0A<script>document.write('<plaintext>',decodeURIComponent(document.URL))</script>

Etheryte 2 years ago |

As an alternative approach you can use an empty data URL to get an empty favicon:

  <link rel="icon" type="image/svg+xml" href="data:image/svg+xml," />

melx 2 years ago | |

or just "ignore" the favicon altogether:

  <link rel="icon" href="data:," />

Etheryte 2 years ago | | |

That's neat, didn't know something as short as that was valid, thanks for the tip.

smartis2812 2 years ago | |

And its dependency free - Nice!

Thank you

myfonj 2 years ago |

You can make folks test it in their browsers by instructing them to copy and paste dataURI into their URL bar, like:

    data:text/html,<link rel="icon" href="https://zany.sh/favicon.svg?text=hi">

This one for example shows nearly invisible text in dark theme for me.

Or maybe add text input to dynamically update current page's favicon to see the outcome instantly.

jchap 2 years ago | |

this is a great idea, going to update the docs. also, regarding dark themes, you can control the text/background color via query params:

    <link rel="icon" href="https://zany.sh/favicon.svg?text=hi&background-color=black&text-color=white">

mthoms 2 years ago |

Is this open source?

jchap 2 years ago | |

it is not, just a simple hosted service

runnr_az 2 years ago |

Clever!