---
url: /docs/guide/usage/linter/rules/eslint/no-nonoctal-decimal-escape.md
---

### What it does

Disallow `\8` and `\9` escape sequences in string literals.

### Why is this bad?

ECMAScript specification treats `\8` and `\9` in string literals as a legacy feature

### Examples

Examples of **incorrect** code for this rule:

```javascript
let x = "\8";
let y = "\9";
```

Examples of **correct** code for this rule:

```javascript
let x = "8";
let y = "\\9";
```

## How to use

## Version

This rule was added in v0.2.10.

## References