# Content that needs no JavaScript > Content that needs no JavaScript: If content is only produced client-side, the page is empty for agents that do not run JavaScript. - Source: /checks/no-js-fallback - Site: AgenticWebScore - Language: English --- If content is only produced client-side, the page is empty for agents that do not run JavaScript. | Property | Value | | --- | --- | | Check id | `no-js-fallback` | | Dimension | Content Accessibility (22%) | | Tier | Essential — pool 80 pts | | Weight inside tier | 2 | | Impact | High | | Maturity | Adopted — A ratified standard with real deployment. | | Conditional | No | | Publishing skill | `server-rendering` | | Standards | — | ## What is measured The scanner fetches the homepage `/` without executing JavaScript, removes ``); }); app.listen(3000); ``` > Escape any user data before interpolating it, and keep the client bundle an enhancement: the text has to be in the HTML before the script runs. ## Related checks | Check | Tier | Impact | Same skill | | --- | --- | --- | --- | | `markdown-negotiation` — Markdown content negotiation | Recommended | Critical | — | | `headings` — Semantic heading structure | Essential | High | — | | `meta` — Title and summary metadata | Essential | High | — | | `jsonld` — JSON-LD structured data | Essential | Critical | — | | `faq-schema` — FAQ / question-answer schema | Recommended | High | — | | `breadcrumb` — Breadcrumb / navigation schema | Emerging | Low | — | | `summary` — Prominent summary block | Recommended | Medium | — | | `lang` — Language declaration and multilingual access | Recommended | Medium | — |