# markdown/fences

> Checks JSON, JSONC, TOML, YAML, Bash, JavaScript, JSX, TypeScript, TSX, and Python code fences in Markdown (.md) files for syntax errors.

Checks JSON, JSONC, TOML, YAML, Bash, JavaScript, JSX, TypeScript, TSX, and Python code fences in Markdown (.md) files for syntax errors.

Part of the [`markdown`](/reference/configurations/markdown/) configuration, at the `recommended` [level](/start/concepts/#levels). It runs at the `commit` [stage](/start/concepts/#stage), per file. gspot runs this check itself.

## Why

A code block that fails to parse shows readers a program that cannot run.

## What to do

Fix the code, or label the block `text` when it holds prose.

## Example

A `bash` fence with `if then` reports a syntax error. Correct the Bash, or label the block `text` when it holds no code.

## Turn it off

Turn it off for some files, with a reason:

```shell
gspot ignore markdown/fences --paths "<glob>" --reason "<why>"
```