time-to-botec/squiggle/node_modules/@stdlib/assert/is-enumerable-property/README.md

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# isEnumerableProperty

> Test if an object's own property is enumerable.

<section class="usage">

## Usage

```javascript
var isEnumerableProperty = require( '@stdlib/assert/is-enumerable-property' );
```

#### isEnumerableProperty( value, property )

Returns a `boolean` indicating if a `value` has an enumerable `property`.

```javascript
var value = {
    'beep': 'boop'
};

var bool = isEnumerableProperty( value, 'beep' );
// returns true

bool = isEnumerableProperty( value, 'constructor' );
// returns false
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   In contrast to the native [Object.prototype.propertyIsEnumerable][mdn-object-property-is-enumerable], this function does **not** throw when provided `null` or `undefined`. Instead, the function returns `false`.

    ```javascript
    var bool = isEnumerableProperty( null, 'a' );
    // returns false

    bool = isEnumerableProperty( void 0, 'a' );
    // returns false
    ```

-   Value arguments other than `null` or `undefined` are coerced to `objects`.

    ```javascript
    var bool = isEnumerableProperty( 'beep', '1' );
    // returns true
    ```

-   Property arguments are coerced to `strings`.

    ```javascript
    var value = {
        'null': false
    };
    var bool = isEnumerableProperty( value, null );
    // returns true

    value = {
        '[object Object]': false
    };
    bool = isEnumerableProperty( value, {} );
    // returns true
    ```

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint-disable object-curly-newline -->

<!-- eslint no-undef: "error" -->

```javascript
var isEnumerableProperty = require( '@stdlib/assert/is-enumerable-property' );

var bool = isEnumerableProperty( { 'a': 'b' }, 'a' );
// returns true

bool = isEnumerableProperty( [ 'a' ], 0 );
// returns true

bool = isEnumerableProperty( [ 'a' ], 'length' );
// returns false

bool = isEnumerableProperty( {}, 'toString' );
// returns false

bool = isEnumerableProperty( {}, 'hasOwnProperty' );
// returns false

bool = isEnumerableProperty( null, 'a' );
// returns false

bool = isEnumerableProperty( void 0, 'a' );
// returns false

bool = isEnumerableProperty( { 'null': false }, null );
// returns true

bool = isEnumerableProperty( { '[object Object]': false }, {} );
// returns true
```

</section>

<!-- /.examples -->

<section class="links">

[mdn-object-property-is-enumerable]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable

</section>

<!-- /.links -->