Common HTML Validation Errors

HTML validation checks whether your markup follows the rules of the HTML specification. Common errors include missing closing tags, duplicate IDs, deprecated elements, and attributes used on the wrong elements. These might seem like technicalities, but they can cause real problems. Duplicate IDs break form labels and JavaScript selectors. Missing closing tags can cause content to render unpredictably across browsers. Valid HTML is more predictable, more accessible, and easier to maintain.

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