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cannot read properties of undefinied (reading map)

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Ana Matei answered on October 10, 2022 Popularity 8/10 Helpfulness 2/10

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answer cannot read properties of undefinied (reading map)

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cannot read properties of undefinied (reading map)

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0

//Using optional chaining with the question mark
{posts?.map(post => <Card details={post} />)}

// Using logical AND
{posts && posts.map(post => <Card details={post} />)}

// Using an if check
if (!posts) {
    return null
}

// Here post will not be undefined anymore
return (
    <React.Fragment>
        {posts.map(post => <Card details={post} />)}
    </React.Fragment>
)

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript properties

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Ana Matei

Contributed on Oct 10 2022

Ana Matei

0 Answers Avg Quality 2/10

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