Basically I want to override grid.js component file in Magento 2
Require config

> 
> view/adminhtml/require-config.js
> 
> 
> 

**Require config code.**

```
var config = {
    map: {
        '*': {
            customScript:'Acx_Grid/js/custom'
        }
    }
};

```

I want to know process how to override J's component in backend.