---
title: MARKLESS_COMPUTED_READS_RENDER_LOCAL
description: "A computed reads a component-body local the browser cannot recompute: a Markless compiler error."
sidebar: { hidden: true }
search: { keywords: ["COMPUTED_READS_RENDER_LOCAL","computed reads render local","markless error"] }
pagination: false
---

**Error** from the compiler, while it builds your `.tsrx` files.

## What happened

Markless prints the message, the reason, and a suggestion:

```text
MARKLESS_COMPUTED_READS_RENDER_LOCAL: `<name>` reads `<localName>`, a local of the component body. The body runs only during the initial render, so the browser's copy of this computed would name a variable that does not exist there.
A computed re-derives in the browser from graph reads, props, and module values. A `const` local built only from those is recomputed in place; any other local has no value the browser can reach.
Declare `<localName>` as `const <localName> = ...` built only from module values, props, and state; move it to module scope; or make it state: `const <localName> = state(...)`.
https://markless.dev/errors/MARKLESS_COMPUTED_READS_RENDER_LOCAL
```

Words in angle brackets change from case to case.

## How to fix it

Start with the suggestion in the message above.

This page has no guide yet. [Help write it](/contributing/improve-these-docs).

## Where it comes from

`@markless/compiler` raises this code. Source:

- [packages/compiler/src/passes/semantic-graph/diagnostics.ts](https://github.com/compiled-run/markless/blob/main/packages/compiler/src/passes/semantic-graph/diagnostics.ts)

Read [how to read a Markless error](/tooling/diagnostics), or go back to [all error codes](/errors).