To override the components of adminhtml J in Magento 2.2.xx


Basically, I want to overwrite the grid.js Compnent file in Magento 2
Requires config view / adminhtml / requir-config.js

Configuration code required

var config = {
Map: {
& # 39; * & # 39 ;: {
customScript: & # 39; Acx_Grid / js / custom & # 39;
}
}
};

I want to know how to override component J in the backend.