#css var isn't defined even though i did define it

18 messages · Page 1 of 1 (latest)

late hazel
#

<style define:vars={{ navbarHeight: ${NAVBAR_HEIGHT}px }}>
.navbar {
height: var(--navbarHeight);
margin-bottom: -1;
position: sticky;
top: 0;
z-index: 1;
}

.expander {
--min-width: 768px;

transition-duration: 250ms;
width: 100%;
overflow: hidden;
backdrop-filter: blur(4rem) brightness(0.75);
-webkit-backdrop-filter: blur(4rem) brightness(0.75);

@media (min-width: var(--min-width)) {
  max-height: var(--navbarHeight);
}

&[data-expanded='false'] {
  max-height: var(--navbarHeight);

  *[data-expanded] {
    display: none;
  }
}

&[data-expanded='true'] {
  max-height: 100vh;
  overscroll-behavior: contain;

  *[data-closed] {
    display: none;
  }
}

}

.hamburger {
display: inline-flex;

@media (min-width: var(--min-width)) {
  display: none;
}

}

.tools {
display: none;

@media (min-width: var(--min-width)) {
  display: flex;
}

}
</style>

but not only does the css not work in chrome it says css variable is undefined

rugged fractalBOT
#

Hi @late hazel. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

It seems like you're trying to use a CSS variable --navbarHeight that you've defined using Astro's define:vars directive. However, it appears that the variable NAVBAR_HEIGHT you're using to define --navbarHeight might not be defined in your component's frontmatter script.

Here's how you can define it:

---
const NAVBAR_HEIGHT = 50; // replace 50 with your desired navbar height
---
<style define:vars={{ navbarHeight: `${NAVBAR_HEIGHT}px` }}>
  .navbar {
    height: var(--navbarHeight);
    margin-bottom: -1;
    position: sticky;
    top: 0;
    z-index: 1;
  }
  ...
</style>

Also, note that in Astro v3.0, the kebab-case transform for camelCase CSS variable names has been removed. So, if you were relying on Astro to transform kebab-case in your styles, you should update your existing styles to camelCase to prevent missing styles (source (https://docs.astro.build/en/guides/upgrade-to/v3/#removed-kebab-case-transform-for-camelcase-css-variables)).

If you're still encountering issues, it might be due to a CSS syntax error. Astro provides error messages for unknown CSS errors and CSS syntax errors, which can help you debug the issue (source (https://docs.astro.build/en/reference/error-reference/#css-errors)).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@late hazel kapa.ai is still learning and improving, please let us know how it did by reacting below

late hazel
#

i have defined it already

late hazel
#

;-;

#

@rugged fractal i have defined it already

rugged fractalBOT
#

Let me check the knowledge base for you. One moment! :books:

#

If you have already defined the NAVBAR_HEIGHT variable and you're still encountering issues, it might be due to a different problem. Here are a few things you can check:

  1. Ensure that the NAVBAR_HEIGHT variable is defined in the same component where you're trying to use it. Variables in Astro are scoped to the component they're defined in and won't be available in other components unless passed as props.

  2. Check if there are any typos or syntax errors in your CSS or Astro code. Even a small typo can cause a variable to be undefined.

  3. Make sure you're using the correct syntax for defining and using CSS variables. In your case, it should be var(--navbarHeight).

  4. If you're using Astro v3.0 or later, ensure that you're using camelCase for your CSS variable names. The kebab-case transform for camelCase CSS variable names has been removed in Astro v3.0 (source (https://docs.astro.build/en/guides/upgrade-to/v3/#removed-kebab-case-transform-for-camelcase-css-variables)).

  5. If you're still encountering issues, it might be helpful to look at the error messages provided by Astro. Astro provides error messages for unknown CSS errors and CSS syntax errors, which can help you debug the issue (source (https://docs.astro.build/en/reference/error-reference/#css-errors)).

If none of these suggestions help, could you provide more information or context about your issue? That would help in diagnosing the problem.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@late hazel kapa.ai is still learning and improving, please let us know how it did by reacting below

late hazel
#

@rugged fractal

even this doesn't work
<style define:vars={{ test: '20px' }}>
.navbar {
height: var(--test);
}
</style>

rugged fractalBOT
#

Let me check the knowledge base for you. One moment! :books:

#

The code you've provided seems correct. However, if it's not working, it might be due to a few reasons:

  1. Astro Version: Ensure you're using Astro v0.21.0 or later. The define:vars directive was introduced in this version.

  2. Browser Support: Ensure you're testing in a browser that supports CSS variables. Most modern browsers do, but if you're using an older browser, it might not recognize the var(--test) syntax.

  3. CSS Conflicts: Check if there are any other CSS rules that might be overriding the height of .navbar.

  4. Astro Component Structure: Ensure that the .navbar class is being used within the same Astro component where the style is defined. Styles defined in one component won't apply to other components unless you're using global styles.

If none of these suggestions help, could you provide more information or context about your issue? That would help in diagnosing the problem.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@late hazel kapa.ai is still learning and improving, please let us know how it did by reacting below

late hazel
#

@rugged fractal this works

<div class="navbar"></div>

but a react component doesn't work

<Box class="navbar"></div>

this is what <Box/> generated in the html

<div data-astro-cid-5blmo7yk="true" class="rt-Flex test-b"></div>

rugged fractalBOT
#

Let me check the knowledge base for you. One moment! :books:

#

It seems like you're trying to apply styles to a React component (<Box/>) in Astro. The issue might be due to how Astro handles styles for components from different frameworks.

Astro applies scoped styles to HTML elements and Astro components, but it doesn't apply these styles to components from other frameworks like React, Vue, or Svelte. This is because these frameworks handle their own component scoping, and Astro doesn't interfere with that.

If you want to style a React component in Astro, you have a few options:

  1. Inline Styles: You can pass inline styles directly to the React component.
<Box style={{ height: 'var(--test)' }} />

  1. Styled Components: If you're using a library like styled-components or emotion, you can define your styles in the React component itself.

  2. Global Styles: You can define global styles in Astro that apply to all components, regardless of the framework. Be aware that this can potentially lead to style conflicts.

<style global>
  .navbar {
    height: var(--test);
  }
</style>

Remember to replace --test with your actual variable or value.

If none of these suggestions help, could you provide more information or context about your issue? That would help in diagnosing the problem.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: