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Equality operator may cause type coercion

Reports a usage of equality operators may cause unexpected type coercions. Suggests replacing == or != equality operators with type-safe === or !== operators.

Depending on the option selected, one of the following cases will be reported:

  • All usages of == and != operators.

  • All usages except comparison with null. Some code styles allow using x == null as a replacement for x === null || x === undefined.

  • Only suspicious expressions, such as: == or != comparisons with 0, '', null, true, false, or undefined.

Locating this inspection

By ID

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

EqualityComparisonWithCoercionJS
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 | TypeScript

Inspection options

Here you can find the description of settings available for the Equality operator may cause type coercion inspection, and the reference of their default values.

Highlight usages of '==' and '!='

Default setting: All except when comparing with null or typeof

Other available settings:

  • All

  • Only suspicious expressions

Last modified: 03 December 2024