JavaScript
JavaScript tried to assign to something that is not assignable
SyntaxError: invalid assignment left-hand side
JavaScript found an assignment target that cannot appear on the left side of =, such as the result of an expression.
Error AtlasError Documentation and ResolutionObserved message
SyntaxError: invalid assignment left-hand side
Why it happens
- Code assigns to the result of an expression rather than a real target.
- A comparison or function call was used where an assignment target was intended.
- A complex expression was mistyped during refactoring.
How to fix it
- Assign only to variables, object properties, or valid destructuring patterns.
- Check whether == or === was intended instead of =.
- Simplify the expression and confirm what the actual assignment target should be.
Official reference
MDN: SyntaxError: invalid assignment left-hand sideRelated errors
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