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VisualizaçõesTypeError: Cannot read properties of undefined (reading 'toISOString')
import './ExpenseItem.css';
function ExpenseItem(props){
return (
<div className="expense-item">
<div>{props.date.toISOString()}</div>
<div className="expense-item__description">
<h2>{props.title}</h2>
<div class="expense-item__price">${props.amount}</div>
</div>
</div>
)
}
export default ExpenseItem;
TypeError: Cannot read properties of undefined (reading 'toISOString')
3 Respostas
Responde à pergunta0
It will give this error because your props.date is undefined and you can not call toISOString in undefined.
So, please check why props.date field is undefined, and if the case is related to API calling or asynchronous then go with the optional chaining solution, or if it is not supported then go with the regular flow.
Optional Chaining
<div>{props.date?.toISOString()}</div>
Regular
<div>{props.date ? props.date.toISOString() : null}</div>
0
Looks like either props or props.date is undefined. undefined does not have a methodtoISOString. Thus calling this function throws an error.
Make sure that you pass in correct props in your parent Component.
0
I had the same issue. The problem was actually in the App.js file I wrote the wrong syntax of ExpenseItem. There fore you should check that you include the props in the ExpenseItem tag, not outside, not beetween! Example <ExpenseItem "THE PROPS" >
<ExpenseItem
title={expenses[0].title}
amount={expenses[0].amount}
date={expenses[0].date}
></ExpenseItem>