Home/ Questions/''expected an assignment or function call and instead saw an expression no-unused-expressions'' error - how to solve it?
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lenorepollich
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Asked: 2022-06-22T07:44:51+00:00 In:

”expected an assignment or function call and instead saw an expression no-unused-expressions” error – how to solve it?

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When I run my program, i encounter this error message:

Expected an assignment or function call and instead saw an expression no-unused-expressions

Here is my code:

const todoList = ({ todos, onTodoclick }) => {
    return (<ul>
        {
            todos.map(todo => {
                <Todo key={todo.id}
                    {...todo}
                    onClick={() => onTodoclick(todo.id)}>
                </Todo>
            })
        }
    </ul>)
}

How can I do with ”expected an assignment or function call and instead saw an expression no-unused-expressions” error?

 

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1 Answer

  1. Best Answer
    Expert

    The cause: This error happens because you put a bracket on the return statement.

    Solution: You should put opened bracket ( on the same line after => lamda expression, and removed the return statement as the following:

    const todoList = ({ todos, onTodoclick }) => (
    <ul>
        {
            todos.map(todo =>
                <Todo key={todo.id}
                    {...todo}
                    onClick={() => onTodoclick(todo.id)}>
                </Todo>
            )
        }
    </ul>
)

    Follow the article below to understand more

    👇️ Resolve error: “Expected an assignment or function call and instead saw an expression”

    • 2

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