# WeakMap Support
> Detect native [`WeakMap`][mdn-weakmap] support.
## Usage
```javascript
var hasWeakMapSupport = require( '@stdlib/assert/has-weakmap-support' );
```
#### hasWeakMapSupport()
Detects if a runtime environment supports ES2015 [`WeakMap`][mdn-weakmap].
```javascript
var bool = hasWeakMapSupport();
// returns
```
## Examples
```javascript
var hasWeakMapSupport = require( '@stdlib/assert/has-weakmap-support' );
var bool = hasWeakMapSupport();
if ( bool ) {
console.log( 'Environment has WeakMap support.' );
} else {
console.log( 'Environment lacks WeakMap support.' );
}
```
* * *
## CLI
### Usage
```text
Usage: has-weakmap-support [options]
Options:
-h, --help Print this message.
-V, --version Print the package version.
```
### Examples
```bash
$ has-weakmap-support
```
[mdn-weakmap]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap