Let's walk through potential issues and fixes to get your tooltip up and running:

1. Confirm the .lib-tooltip() Mixin is Valid #

First, double-check that the .lib-tooltip() LESS mixin exists in your theme's codebase. If this is a custom mixin you built, verify its syntax is correct and that it’s imported properly into styles-l.css. If it’s a theme-provided mixin (common in platforms like Magento), make sure you’ve included all required LESS files that define this mixin before calling it.

2. Ensure LESS is Compiled to CSS #

Since you’re using LESS syntax, you need to confirm your theme’s build process has compiled styles-l.css into usable CSS. Run your theme’s compilation command (like grunt less or your project’s specific tool) and check the generated CSS file—look for the .custom-tooltip class to see if it has the expected tooltip styles applied.

3. Inspect HTML and Basic Visibility Styles #

Use your browser’s dev tools to review the rendered HTML:

• Check for typos in class names (note: you have a typo Tolltip in your content text, but that won’t break functionality).
• Most tooltips start hidden by default—verify if .lib-tooltip() handles this. If not, add basic visibility styles manually:

.custom-tooltip {
    position: relative; /* Critical for positioning the tooltip */
}

.custom-tooltip .tooltip-content {
    display: none;
    position: absolute;
    right: 100%; /* Matches your "right" mixin parameter */
    margin-right: 8px;
    /* Add styling like background, padding, border here */
}

.custom-tooltip:hover .tooltip-content,
.custom-tooltip .tooltip-toggle:focus + .tooltip-content {
    display: block;
}

4. Check for Required JavaScript #

Some tooltip implementations rely on JS for toggle behavior (like closing on click outside or adding delays). If your .lib-tooltip() mixin is paired with a JS component, confirm the corresponding script is loaded in your theme and check the browser console for any errors related to tooltip initialization.

5. Rule Out Style Conflicts or Specificity Issues #

Use dev tools to inspect the tooltip elements:

• Are your custom styles being overridden by higher-specificity CSS rules? If so, make your selectors more specific (e.g., .page-wrapper .custom-tooltip .tooltip-content) or use !important only as a last resort.
• Ensure no parent elements have position: static (which breaks absolute positioning of the tooltip content). The .custom-tooltip element should have position: relative—add it if the mixin doesn’t include it.

6. Verify File Loading Order and Paths #

Confirm styles-l.css is loaded correctly in your theme’s layout. If another CSS file loads after it, it might override your tooltip styles. Also, check that your HTML tooltip snippet is properly rendered on the page (not hidden by template logic).

内容的提问来源于stack exchange，提问作者Suman Singh