Keep your Sass implementation and version in the request. SCSS is input to a build step; opening an SCSS file in a browser does not establish what your application compiled or loaded.
Compare the component with its descendant
This original fixture has a modifier on the first notice and a differently marked child inside the second:
<div class="notice notice--urgent">Dispatch delayed</div>
<div class="notice">
<span class="notice--urgent">Address needs review</span>
</div>
Suppose a generated rewrite contains:
.notice {
.notice--urgent { font-weight: 700; }
}
The nested selector expands to .notice .notice--urgent. It matches the span inside the second notice. The first div has both classes, but it is not its own descendant, so this rule does not select that div.
If the requirement is a modifier class on the notice itself, the corresponding SCSS is:
.notice {
&--urgent { font-weight: 700; }
}
Its expanded selector is .notice--urgent, which matches both marked elements in the fixture. That includes the span. If the actual rule requires both classes on the same element, use &.notice--urgent inside .notice; it expands to .notice.notice--urgent and matches only the first div here. Choose the rule from the component contract before accepting either replacement.
The Sass parent-selector reference, checked October 24, 2026, explains replacement of & with the outer selector and suffix use. These expansions describe this simple class selector. More complex outer selector lists need their own expansion review.
Check matching before checking the cascade
| Expanded selector | First div | Inner span |
|---|---|---|
.notice .notice--urgent |
No | Yes |
.notice--urgent |
Yes | Yes |
.notice.notice--urgent |
Yes | No |
Compile your candidate with the project's existing Sass command. Inspect the emitted CSS, then inspect which elements match it in the browser. These are separate checks: an emitted selector can be correct while a later declaration wins the computed style.
For a rule that matches but still loses, the CSS cascade-layer guide addresses precedence. Increasing specificity cannot make a descendant selector select its own ancestor.
Ask for a selector-preserving change
Review this SCSS component rule before changing it.
Sass implementation/version and existing build command: [ENTER]
Current SCSS and relevant imports: [PASTE]
Minimal HTML with the real class placement: [PASTE]
Intended matching elements: [IDENTIFY EACH]
Actual emitted CSS and browser observation: [PASTE OR UNKNOWN]
Expand each proposed nested selector to CSS. Compare descendant,
suffix modifier and same-element compound matching against my HTML.
Do not choose a naming convention or change the markup silently.
Return the smallest change preserving the stated matching contract.
Keep expected expansion separate from actual compiler output and
browser results. Do not add !important to repair a nonmatching rule.
OpenAI's prompting documentation supports supplying context, constraints and the requested output. Here the HTML is essential context: SCSS alone does not establish where the classes occur.
Retain the two-element fixture with your accepted patch. After compiling, check the positive target and the element that should remain unaffected. Keep the emitted CSS beside that browser observation so a later nesting change can be compared with the same matching contract.