# [Layers](https://spacevim.org/layers) > checkers

This layer provides syntax checking feature.

## Install

checkers layer is loaded by default.

## options

| Name                         | default value | description                                              |
| ---------------------------- | ------------- | -------------------------------------------------------- |
| `g:spacevim_enable_neomake`  | 1             | Use neomake as default checking tools                    |
| `g:spacevim_enable_ale`      | 1             | Use ale as default checking tools                        |
| `g:spacevim_lint_on_the_fly` | 0             | Syntax checking on the fly feature, disabled by default. |

**NOTE:** if you want to use  ale, you need:

```viml
let g:spacevim_enable_neomake = 0
let g:spacevim_enable_ale = 1
```

and if you want to use syntastic, set this two options to 0.

## Mappings

| Key       | mode   | description                                                  |
| --------- | ------ | ------------------------------------------------------------ |
| `SPC e c` | Normal | clear errors                                                 |
| `SPC e h` | Normal | describe current checker                                     |
| `SPC e n` | Normal | jump to the position of next error                           |
| `SPC e N` | Normal | jump to the position of previous error                       |
| `SPC e p` | Normal | jump to the position of previous error                       |
| `SPC e l` | Normal | display a list of all the errors                             |
| `SPC e L` | Normal | display a list of all the errors and focus the errors buffer |
| `SPC e e` | Normal | explain the error at point                                   |
| `SPC e s` | Normal | set syntax checker                                           |
| `SPC e S` | Normal | set syntax checker executable                                |
| `SPC e v` | Normal | verify syntax setup                                          |
| `SPC t s` | Normal | toggle syntax                                                |