You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
## Is
|
|
|
|
|
|
|
|
|
|
### Instructions
|
|
|
|
|
|
|
|
|
|
Add new function properties to the object `is`` to check a value type
|
|
|
|
|
- `is.num` value is a number
|
|
|
|
|
- `is.nan` value is NaN
|
|
|
|
|
- `is.str` value is a string
|
|
|
|
|
- `is.bool` value is a boolean
|
|
|
|
|
- `is.undef` value is undefined
|
|
|
|
|
- `is.def` value is defined
|
|
|
|
|
- `is.arr` value is an array
|
|
|
|
|
- `is.obj` value is a simple object or null objects
|
|
|
|
|
- `is.fun` value is a function
|
|
|
|
|
- `is.truthy` value is truthy
|
|
|
|
|
- `is.falsy` value is falsy
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### Notions
|
|
|
|
|
|
|
|
|
|
- [https://nan-academy.github.io/js-training/examples/primitive-and-operators](https://nan-academy.github.io/js-training/examples/primitive-and-operators)
|
|
|
|
|
- [https://devdocs.io/javascript/operators/typeof](https://devdocs.io/javascript/operators/typeof)
|
|
|
|
|
- [https://developer.mozilla.org/en-US/docs/Glossary/Truthy](https://developer.mozilla.org/en-US/docs/Glossary/Truthy)
|
|
|
|
|
- [https://developer.mozilla.org/en-US/docs/Glossary/Falsy](https://developer.mozilla.org/en-US/docs/Glossary/Falsy)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
### Code provided
|
|
|
|
|
```js
|
|
|
|
|
const is = {}
|
|
|
|
|
```
|
