#1938·solid

Using imported object for style attribute is reevaluated if other attribute uses updated signal

Author: aquaductapeCreated Oct 30, 2023Updated Sep 1, 2026
Labelsenhancement

Describe the bug

As the title, when using imported object for element style attribute, it is reevaluated if other attributes that use signal that is updated.

In this example a button element style uses an imported object called style which has background value of red.

typescript
export const style = {
  "background": "red",
}

After the button is mounted then it's background is changed to blue via element style property.

javascript
import { style } from "./style"

// ...
onMount(() => {
  buttonEl.style.background = 'blue'
})

return (
  <button style={style} ... ref={buttonEl}>
    {count()}
  </button>
);
}

This button's aria-label attribute uses count signal which increments when clicked

javascript
const [count, setCount] = createSignal(1);
const increment = () => setCount(count() + 1);
let buttonEl;

onMount(() => {
  buttonEl.style.background = 'blue'
})

return (
  <button type="button" onClick={increment} aria-label={count().toString()} style={style} ref={buttonEl}>
    {count()}
  </button>

Your Example Website or App

https://playground.solidjs.com/anonymous/804fbf3b-2166-430f-ab99-c2b78770a1a6

Steps to Reproduce the Bug or Issue

  1. Click counter button

Expected behavior

For button's background color to remain blue, but after clicking button it resets red which is the background property from object style. If button style attribute uses style2 object, which is not imported then the button remains blue after updating count signal https://playground.solidjs.com/anonymous/efc28da8-a36c-42e5-b109-5d7b8a8c145e.

Screenshots or Videos

No response

Platform

  • OS: macOS
  • Browser: Chrome
  • Version: 118.0.5993.117

Additional context

No response