What data-sd-animate=” — fixing broken HTML in titles and safeguards for web editors
Problem
Some CMS or WYSIWYG editors let users paste HTML into titles. Fragments like What can appear accidentally and break display, cause validation errors, or open XSS risks.
Why it happens
- Truncated copy-paste from an editor or export.
- Interrupted autosave or network failure while saving.
- Improper sanitization when importing titles from third-party sources.
- Editors that allow inline attributes but strip matching end tags, leaving open tags.
Immediate fixes (what to do now)
- Remove the fragment manually: Edit the title and delete from the stray
<through the unfinished attribute so the visible title reads correctly (e.g., “What …”). - Replace with safe text: If the intended title is unknown, use a neutral placeholder like “Untitled” or reconstruct a likely full title: “What to Know About …”
- Validate HTML: Run the page through an HTML validator or view page source to ensure no unclosed tags remain.
Preventative steps for editors and developers
- Sanitize input: Strip or escape stray HTML when saving titles. Allow only a very small whitelist (e.g., basic entities) if formatting is required.
- Enforce length limits: Prevent truncation mid-tag by validating string length before saving; if truncation is unavoidable, strip partial tags.
- Autosave atomically: Save titles and attributes in a single atomic transaction to avoid partial writes.
- Use a plain-text title field: Keep titles as plain text separate from rich content to eliminate embedded HTML.
- Implement client-side checks:** Warn users if pasted text contains HTML; offer a “paste as plain text” option.
Security considerations
- Treat any unclosed or unexpected tag in titles as potential XSS risk. Escape
<and>on render or remove tags server-side. - Log occurrences to detect repeated malicious attempts to inject attributes or scripts.
Quick script to clean titles (example)
javascript
// Removes any HTML tags and trims whitespacefunction cleanTitle(str) { return str.replace(/</?[^>]+(>|$)/g, ””).trim();}When to restore from backups
If multiple pages show broken titles after an editor update or import, restore the affected content from backups taken before the change, then apply the preventative fixes above.
Summary
Stray fragments like What
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