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Reuse of local variable

Reports reusing a local variable and overwriting its value with a new value that is not related to the original variable usage. Reusing a local variable in this way may be confusing because the intended semantics of the local variable may vary with each usage. It may also cause bugs, if code changes result in values that were expected to be overwritten while they are actually live. It is good practices to keep variable lifetimes as short as possible, and not reuse local variables for the sake of brevity.

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | JavaScript and TypeScript | Data flow


By default bundled with

CLion 2024.1, GoLand 2024.1, IntelliJ IDEA 2024.1, JetBrains Rider 2023.3, PhpStorm 2024.1, PyCharm 2024.1, Qodana for .NET 2023.3, Qodana for Go 2024.1, Qodana for JS 2024.1, Qodana for JVM 2024.1, Qodana for PHP 2024.1, Qodana for Ruby 2024.1, RubyMine 2024.1, WebStorm 2024.1

Can be installed with plugin

JavaScript and TypeScript, 241.18072

Last modified: 18 June 2024