Disallow deleting variables

✅ Recommended

The "extends": "eslint:recommended" property in a configuration file enables this rule

The purpose of the delete operator is to remove a property from an object. Using the delete operator on a variable might lead to unexpected behavior.

Rule Details

This rule disallows the use of the delete operator on variables.

If ESLint parses code in strict mode, the parser (instead of this rule) reports the error.

Examples of incorrect code for this rule:

Open in Playground
/*eslint no-delete-var: "error"*/

var x;
delete x;


This rule was introduced in ESLint v0.0.9.


Change Language