The partial blacklist disables certain keys for each webpage separately.
This is enabled by describing object with `"url"` and `"keys"` instead of a string in the blacklist.
To disable <kbd>j</kbd> and <kbd>k</kbd> keys (scroll down and up) on github.com as an example, describe target url and disabled keys as the following:
```json
{
"blacklist" [
{ "url": "github.com", "keys": ["j", "k"] }
]
}
```
The partial blacklist blocks all operations starting with the keys but not exactly-matched.
That means if the g described in "keys" field, it block all operation starting with <kbd>g</kbd>, such as <kbd>g</kbd><kbd>g</kbd>, <kbd>g</kbd><kbd>t</kbd>, and <kbd>g</kbd><kbd>T</kbd>.