Error: Unable to access 'name' property in reactjs due to undefined value

Here is the frontend code snippet:

{
(opp||[]).map(opps=>{
    return(
        <div className="card OppCard">
        <div className="card-body" >
            <h4>{opps.title}</h4>
            <p><b>Author : {opps.postedBy.name}</b></p>
            <p style={{ "margin": "0px" }}>Description : {opps.desc}</p>
            <p style={{ "margin": "0px" }}>Location : {opps.location}</p>
            <p style={{ "margin": "0px" }}>Experience Required : {opps.experience}</p>
            <p style={{ "margin": "0px" }}>Last Date to Apply : {opps.ld}</p>
        </div>
    </div>
    )
}) 
}

An error occurs at 

<p><b>Author : {opps.postedBy.name}</b></p>
. The attached image shows the structure of the opps object: https://i.stack.imgur.com/GKPF6.png

node.jsreactjsmongodbexpressmern

Answer №1

Always remember to validate a json object before attempting to access it, to avoid errors. Make sure to check if it is defined before calling a method or accessing a property. Replace the following line,

<p><b>Author : {opps.postedBy.name}</b></p>

With this updated version, where you are checking before accessing the property. Also, when using methods like .filter() or .map(), always verify if the object is not empty before performing any actions on it, to prevent potential errors.

<p><b>Author : {opps.postedBy && opps.postedBy.name}</b></p>

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