blink "\e[5" doesn't work

[vigo]

hi. i'm not sure if i need to set something in configuration, cursor blink works but as ANSI escape blink does not.

echo -e "\e[5mblink\e[0m"

blinks on macOS Terminal but not in Ghostty

[thecharlesjenkins]

I noticed this as well. I implemented this feature here: https://github.com/thecharlesjenkins/ghostty/tree/dev/charlie/support_ansi_blinking. I'll open a PR if this is the desired behavior!

blinking.mp4

[pluiedev]

Eh, not really, your impl is basically the same as mine anyway and it doesn't really matter

[thecharlesjenkins]

Either way, I am happy to pick it up but I don't want to step on your toes :)

[pluiedev]

I'd say go with your changes then :D

[deadcyclo]

Was the pull request ever made?

[pluiedev]

It's #5217 I believe. Nobody has really looked at it yet

[precia-bbc]

Personally, I find WezTerm's implementation of "blink by fading" more pleasing than the MacOS terminal "PWM mode"

Screen.Recording.2025-01-30.at.17.01.30.mov

[precia-bbc]

I think it's also easier for the eye to spot (and read) a continuous transition when it's darting about the screen than it is something that's not being drawn 50% of the time

[pluiedev]

Personally, I find WezTerm's implementation of "blink by fading" more pleasing than the MacOS terminal "PWM mode"

Screen.Recording.2025-01-30.at.17.01.30.mov

This would require a rewrite of our rendering pipeline to enable more animation frames without incurring high performance and energy costs (i.e. make custom-shader-animation = always actually performant). I think we can always implement the PWM blink for now and a "smooth" blink à la Kitty and WezTerm later. (We probably won't implement the myriad customization options that Kitty offers, but I agree a smooth blink would be quite visually appealing)

[albujuk]

I noticed it is still missing till now (V1.3.1).

I implemented this feature based on what @thecharlesjenkins did, but it is compatible with the conflicting changes.

You can see my changes https://github.com/albujuk/ghostty/tree/feat/support-ansi-blinking

I'll open a PR if this is the desired behavior.

Screencast.From.2026-04-13.09-46-04.webm

---

Edit: Here is the diff link main...albujuk:ghostty:feat/support-ansi-blinking

[albujuk]

@pluiedev, would you like to review before I open a PR, please

[bo2themax]

It's better to provide a diff link against upstream here, your private fork isn't available to everyone and one have to navigate to commits page to see the actual changes.

[albujuk]

It's better to provide a diff link against upstream here, your private fork isn't available to everyone and one have to navigate to commits page to see the actual changes.

Hey @bo2themax, Thanks for the reply.

Sure, here is the diff link main...albujuk:ghostty:feat/support-ansi-blinking