Audit how quickly a page shows its first text or image. Use performance measurements to identify blocking resources, slow server responses, and rendering delays, then recommend changes tied to the confirmed bottlenecks.
中文简介正在准备中。当前显示英语简介。
Use when auditing slow page loads, heavy assets, or rendering delays related to Optimize first contentful paint. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.
安装前可以查看交给 AI 代理的指令内容。
FCP is the first visual signal that a page is loading—fast FCP reassures users that the site is responding, reducing perceived wait time and bounce rates.
Measure FCP using Lighthouse or PageSpeed Insights. Verify first content appears within 1.8 seconds.
Optimize FCP by eliminating render-blocking resources, inlining critical CSS, and reducing server response time.
Explain how FCP measures the time until the first text or image is painted, indicating page load has begun.
Review the routes, assets, and loading behavior that affect Optimize first contentful paint. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/performance/first-contentful-paint
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Create and review custom 404 pages that help visitors recover from broken or moved links through search and navigation. Check the rendered page and HTTP response so missing content returns a proper 404 status.
中文简介正在准备中。当前显示英语简介。
Audit or create a dedicated About page that explains a website’s purpose and identifies its people or organization. Review the rendered output and supporting information, including expertise and contact details, to find gaps.
中文简介正在准备中。当前显示英语简介。
为页面和共用组件添加自动无障碍测试，检查现有测试的覆盖缺口，并将检查接入持续集成流程，以发现结构、属性问题及修改引入的新问题。
检查从登录、多因素认证到账户恢复的完整流程，找出禁止粘贴、验证码必须手动输入等使用障碍，并协助改进认证方式。
检查表单错误、完成通知和实时更新能否通过屏幕阅读器传达，核对实际显示的HTML属性、通知停留时间及关闭方式，并指出具体问题。
检查表头与数据单元格的对应关系，将 HTML 调整为屏幕阅读器也能传达数据含义的结构。从简单表格到包含合并单元格的复杂表格都可检查。