For AI agents: A markdown version of this page is available at https://docs.datadoghq.com/security/code_security/static_analysis/static_analysis_rules/javascript-best-practices/no-with.md. A documentation index is available at /llms.txt.

The with statement can lead to ambiguous code

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Metadata

ID: javascript-best-practices/no-with

Language: JavaScript

Severity: Error

Category: Best Practices

CWE: 710

Description

The with statement in JavaScript is used to add a given object’s properties as variables in a specific block of code. While it may seem convenient, the with statement has several pitfalls and can lead to hard-to-diagnose problems.

Non-Compliant Code Examples

with(foo) { bar() }

Compliant Code Examples

foo.bar()
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