npm package: @lemoncode/fonk-chars-not-black-list-validator
Description: This is a [fonk](https://github.com/Lemoncode/fonk) microlibrary that brings validation capabilities to validate if a field of a form only contains valid characters
Author: Lemoncode
Latest version: 1.0.0

# fonk-chars-not-black-list-validator

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This is a [fonk](https://github.com/Lemoncode/fonk) microlibrary that brings validation capabilities to:

- Validate if a field of a form only contains valid characters.

How to install it:

```bash
npm install @lemoncode/fonk-chars-not-black-list-validator --save
```

How to add it to an existing form validation schema:

We have the following form model:

```
const myFormValues = {
  product: 'shoes',
  price: 20,
}
```

We can add a charsNotBlackList validation to the myFormValues. CustomArgs are required:

```javascript
import { charsNotBlackList } from '@lemoncode/fonk-chars-not-black-list-validator';

const validationSchema = {
  field: {
    product: [
      {
        validator: charsNotBlackList.validator,
        customArgs: { blackListChars: 'nw5' },
      },
    ],
  },
};
```

Some characters will need to be escaped on the blacklist because they are used in a RegExp. 
For example, if you want to include backslash (\\) or simple quote(') as blacklist characters you will need to escape them:

```javascript
import { charsNotBlackList } from '@lemoncode/fonk-chars-not-black-list-validator';

const validationSchema = {
  field: {
    product: [
      {
        validator: charsNotBlackList.validator,
        customArgs: { blackListChars: 'n\'w\\5' },
      },
    ],
  },
};
```

You can customize the error message displayed in two ways:

- Globally, replace the default error message in all validationSchemas (e.g. porting to spanish):

```javascript
import { charsNotBlackList } from '@lemoncode/fonk-chars-not-black-list-validator';

charsNotBlackList.setErrorMessage('El campo contiene caracteres no válidos.');
```

- Locally just override the error message for this validationSchema:

```javascript
import { charsNotBlackList } from '@lemoncode/fonk-chars-not-black-list-validator';

const validationSchema = {
  field: {
    price: [
      {
        validator: charsNotBlackList.validator,
        message: 'Error message only updated for the validation schema',
      },
    ],
  },
};
```

Please, refer to [fonk](https://github.com/Lemoncode/fonk) to know more.

## License

[MIT](./LICENSE)

# About Basefactor + Lemoncode

We are an innovating team of Javascript experts, passionate about turning your ideas into robust products.

[Basefactor, consultancy by Lemoncode](http://www.basefactor.com) provides consultancy and coaching services.

[Lemoncode](http://lemoncode.net/services/en/#en-home) provides training services.

For the LATAM/Spanish audience we are running an Online Front End Master degree, more info: http://lemoncode.net/master-frontend