!Code style

Toba Node Tools

Utility methods with Node dependencies.

$3

``ts
import { is } from '@toba/tools';
`

Identity checks evaluate whether a variable is of a given type. All return true or false. Where possible, they implement TypeScript type guards so the value is thereafter recognized as a particular type.

#### value

`ts
is.value(x);
`

Whether x is not undefined and not null.

The parameter is generic so the variable may thereafter be recognized as that type. For example, if is.value(var) evaluates true then TypeScript will also know to treat var as a string.

#### empty

`ts
is.empty(x);
`

Whether x is undefined, null or an empty string ("").

#### defined

`ts
is.defined(x, name);
`

Whether name is a property of the object x`.

$3

stuff

License

Copyright © 2019 Jason Abbott

This software is licensed under the MIT license. See the LICENSE file
accompanying this software for terms of use.