JSFiddle - React, Tailwind, and code Playground

JavaScript

var arrayObj = [{
    key1: 'value1', key2: 'value2'},
{
    key1: 'value1', key2: 'value2'}],
    i;

for (i = 0; i < arrayObj.length; i++) {
    arrayObj[i].stroke11 = arrayObj[i]['key1'];
    delete arrayObj[i].key1;
}

alert(arrayObj[1]['key1']); // undefined
alert(arrayObj[1]['stroke']); // value1