Попробуйте использовать уменьшить :
const arr = ["key1:value1","key2,value2"];
const object = arr.reduce((obj, item) => {
const colon = item.split(':');
if (colon.length === 2) {
obj[colon[0]] = colon[1];
return obj;
}
const comma = item.split(',');
if (comma.length === 2) {
obj[comma[0]] = comma[1];
return obj;
}
return obj;
}, {});
или forEach
const arr = ["key1:value1","key2,value2"];
const object = {};
arr.forEach(item => {
const colon = item.split(':');
if (colon.length === 2) {
obj[colon[0]] = colon[1];
}
const comma = item.split(',');
if (comma.length === 2) {
obj[comma[0]] = comma[1];
}
});