Breaking News: Grepper is joining You.com. Read the official announcement!

cannot read properties of undefinied (reading map)

Add Answer

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

Contents

answer cannot read properties of undefinied (reading map)

More Related Answers

Uncaught TypeError: Cannot read properties of undefined (reading 'initializeApp')

Uncaught TypeError: Cannot read properties of undefined (reading 'Constructor')

Cannot read properties of null (reading 'useRef')

TypeError: Cannot read property 'setState' of undefined

why array.map returns undefined

Uncaught TypeError: Cannot read properties of undefined (reading 'mData')

TypeError: Cannot read property 'map' of undefined

TypeError: Cannot read properties of undefined (reading '_id')

Uncaught TypeError: Cannot read properties of undefined (reading 'recalc')

ncaught TypeError: Cannot read properties of undefined (reading 'reload')

Cannot read properties of undefined (reading 'target)

why array.map returns undefined

Context: Cannot read properties of undefined

Cannot read properties of undefined (reading 'getRepository')

Uncaught TypeError: Cannot read properties of undefined (reading 'Constructor')

Cannot read properties of undefined (reading 'map') - useQuery

Cannot read properties of undefined (reading 'undefined') this error

Error in render: "TypeError: Cannot read property 'state' of undefined"

Uncaught TypeError: Cannot read properties of undefined (reading 'removeEventListener')

TypeError: Cannot read properties of undefined (reading 'overlayAnimation')

Context: Cannot read properties of undefined

TypeError: Cannot read properties of undefined (reading 'isRequired') +proptypes

react-dom.development.js:26923 Uncaught TypeError: Cannot read properties of undefined (reading 'map') at Meals (Meals.jsx:8:11)

Uncaught TypeError: Cannot read properties of undefined (reading 'deep')

Cannot read properties of undefined in a quiz app

map Cannot read properties of undefined (reading 'get') typescripèt

cannot read properties of undefined react-render html

Uncaught TypeError: Cannot read properties of undefined (reading 'hasOwnProperty')

Cannot read properties of undefined (reading 'props')

cannot read properties of undefinied (reading map)

Comment

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

Share

Link to this answer
Share Copy Link

Ana Matei

Contributed on Oct 10 2022

Ana Matei

0 Answers Avg Quality 2/10

X

Continue with Google

By continuing, I agree that I have read and agree to Greppers's Terms of Service and Privacy Policy.

X

Grepper Account Login Required

Oops, You will need to install Grepper and log-in to perform this action.

Install Grepper Here