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I am currently developing a website/web app with a dark mode functionality. The idea is that under certain circumstances (user interaction with a control or time of day), the application palette will update from an off-white color scheme to a dark gray/gray-blue color scheme.

My concern is that the theme_color defined in my manifest will not match the dark mode color palette when switched, which will make the dark mode top bar on mobile look a bit odd.

Is there a way to make the theme_color change dynamically based on the website's colors? Or, even better, is there a way to specify a condition or programmatically update the theme_color when the application changes from one mode to another (i.e. via JS on the client-side)?

On a side note, I am using CSS custom properties in my website, if that can be of use in switching from one color palette to another for the theme_color.

I am currently developing a website/web app with a dark mode functionality. The idea is that under certain circumstances (user interaction with a control or time of day), the application palette will update from an off-white color scheme to a dark gray/gray-blue color scheme.

My concern is that the theme_color defined in my manifest will not match the dark mode color palette when switched, which will make the dark mode top bar on mobile look a bit odd.

Is there a way to make the theme_color change dynamically based on the website's colors? Or, even better, is there a way to specify a condition or programmatically update the theme_color when the application changes from one mode to another (i.e. via JS on the client-side)?

On a side note, I am using CSS custom properties in my website, if that can be of use in switching from one color palette to another for the theme_color.

  • javascript
  • manifest.json
Share Improve this question asked Aug 12, 2019 at 6:52 Angelos ChalarisAngelos Chalaris 6,7278 gold badges53 silver badges81 bronze badges 8
  • You could have 2 manifest.json files, and change which one is linked to. I'm not sure if that'd properly update in the browser, though. – Cerbrus Commented Aug 12, 2019 at 6:58
  • @Cerbrus I don't think I really have a lot of choices when it es to picking a manifest file, as it normally loads from a page's <head>, so that might not really be an option. – Angelos Chalaris Commented Aug 12, 2019 at 7:01
  • You can change the file it links to, though. But if the browser would detect that change? Give it a try... – Cerbrus Commented Aug 12, 2019 at 7:02
  • @Cerbrus doesn't seem to work... – Angelos Chalaris Commented Aug 12, 2019 at 7:11
  • Ah that’s a bummer – Cerbrus Commented Aug 12, 2019 at 7:31
 |  Show 3 more ments

2 Answers 2

Reset to default 11

Full credit to @smat-8097 for this, just adding it as an answer because

  1. It works, and
  2. It was lost in the ments of their sessionStorage answer

Use:

document.querySelector('meta[name="theme-color"]').setAttribute('content', '#123456');

This can be called to dynamically change the theme color -- just remove any theme_color attributes in manifest.json (background_color is okay to have).

You may use sessionStorage to specify which mode is enabled , and accordingly assign manifest files on window load by using sessionStorage.get .

本文标签： javascriptChange themecolor when switching to dark modeStack Overflow

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