Your page uses `document.write()`, which can block the HTML parser and significantly delay page rendering, especially for users on slow connections. This practice is generally discouraged for performance reasons.
<script>document.write('<p>Hello</p>');</script>Replace `document.write()` with modern DOM manipulation methods like `appendChild` or `innerHTML`.
<div id="content"></div>
<script>document.getElementById('content').innerHTML = '<p>Hello</p>';</script>Modern DOM manipulation methods do not block the HTML parser, allowing the page to render progressively and improving FCP and LCP scores.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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