JSFiddle - React, Tailwind, and code Playground

JavaScript

selectedRows = [{"itemNumber":"","lineNumber":1,"description":"PUMP,COMPLETE, P/N E12LYTFS-137","uom":"","poQuantity":"1","recievedQuantity":"3","isMatched":false,"p2PLineItemId":"168512","quantityUnitPrice":"1","buyerItemNumber":null}]; 

 
 ispoQuantityInvalid = () => (element, index, array) => {
 alert()
    return this.isEmpty(element.poQuantity);//replaced poQuantity with quantityUnitPrice to avoid decimal
  }
console.log(this.selectedRows)

if (this.selectedRows.some(this.ispoQuantityInvalid)) {
     console.log('po qty is null or empty')
      return;
    }


  isEmpty = (value) => {
 
    return (value == null || value.length === 0 || value === '' || value == 0);
  }