selfAssignments

Reports self-assignments which have no effect and are likely errors.

✅ This rule is included in the ts logical and logicalStrict presets.

Self-assignments where a variable is assigned to itself have no effect and typically indicate an incomplete refactoring or a copy-paste error. These assignments serve no purpose and should be removed or corrected to assign the intended value.


let value: string
value = 
let value: string
value;


let count: number
count &&= 
let count: number
count;


let flags: Record<string, unknown>
flags.
unknown
value ||= 
let flags: Record<string, unknown>
flags.
unknown
value;


let data: string
data ??= 
let data: never
data;


let value: string
value = 
const newValue: string
newValue;


let count: number
count &&= 
const otherCount: number
otherCount;


let flag: string
flag ||= 
const defaultFlag: string
defaultFlag;


let data: string
data ??= 
const fallbackData: string
fallbackData;

Options

This rule is not configurable.

When Not To Use It

There are rarely valid reasons to use self-assignment. In cases where you need to trigger getters/setters or proxies, consider adding a comment explaining the intentional self-assignment.

Equivalents in Other Linters

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selfAssignments

Examples

Options

When Not To Use It

Further Reading

Equivalents in Other Linters