Encountering an issue: TypeError - Unable to access attributes of undefined entity (reading 'forEach')

Encountering a Typescript error during execution The specific error message is as follows:

TypeError: Cannot read properties of undefined (reading 'forEach')
at ScapprovalPaymentEventComponent.<anonymous> (http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:6102:33)
at step (http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:5940:23)
at Object.next (http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:5921:53)
at http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:5915:71
at new ZoneAwarePromise (http://localhost:50000/polyfills.js?v=23.1.0+Build-17.02-1904:8553:29)
at push../ClientApp/app/components/forms/scapproval-payment-event/scapproval-payment-event.component.ts.__awaiter (http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:5911:12)
at push../ClientApp/app/components/forms/scapproval-payment-event/scapproval-payment-event.component.ts.ScapprovalPaymentEventComponent.initializeControls (http://localhost:50000/main.js?v=23.1.0+Build-17.02-1904:6058:16)

The relevant code snippet is provided below:

this.totalCount = response.total_rows;
this.bookmark = response.bookmark;
if (isPaginationCall && this.approvedForms && this.approvedForms.length > 0) {
    paymentForms.forEach(x => this.approvedForms.push(x));
} else {
    this.approvedForms = paymentForms;
}
this.onShowRecordChange();
setTimeout(() => {
    this.spinner.hide("MONITORPAYMENT");
}, 0);

Answer №1

Utilizing the .forEach method is ideal when working with arrays specifically. An error may occur if you attempt to use the .forEach method with a data structure other than an array.

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