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@@ -0,0 +1,129 @@
<!--

@license Apache-2.0

Copyright (c) 2025 The Stdlib Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

-->

# ToPrimitive Symbol Support

> Detect native [`Symbol.toPrimitive`][mdn-to-primitive-symbol] support.

<section class="usage">

## Usage

<!-- eslint-disable id-length -->

```javascript
var hasToPrimitiveSymbolSupport = require( '@stdlib/assert/has-to-primitive-symbol-support' );
```

#### hasToPrimitiveSymbolSupport()

Detects if a runtime environment supports [`Symbol.toPrimitive`][mdn-to-primitive-symbol].

<!-- eslint-disable id-length -->

```javascript
var bool = hasToPrimitiveSymbolSupport();
// returns <boolean>
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint-disable id-length -->

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

```javascript
var hasToPrimitiveSymbolSupport = require( '@stdlib/assert/has-to-primitive-symbol-support' );

var bool = hasToPrimitiveSymbolSupport();
if ( bool ) {
console.log( 'Environment has Symbol.toPrimitive support.' );
} else {
console.log( 'Environment lacks Symbol.toPrimitive support.' );
}
```

</section>

<!-- /.examples -->

* * *

<section class="cli">

## CLI

<section class="usage">

### Usage

```text
Usage: has-to-primitive-symbol-support [options]

Options:

-h, --help Print this message.
-V, --version Print the package version.
```

</section>

<!-- /.usage -->

<section class="examples">

### Examples

```bash
$ has-to-primitive-symbol-support
<boolean>
```

</section>

<!-- /.examples -->

</section>

<!-- /.cli -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

[mdn-to-primitive-symbol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toPrimitive

</section>

<!-- /.links -->
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/**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
var pkg = require( './../package.json' ).name;
var hasToPrimitiveSymbolSupport = require( './../lib' ); // eslint-disable-line id-length


// MAIN //

bench( pkg, function benchmark( b ) {
var bool;
var i;

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
// Note: the following *could* be optimized away via loop-invariant code motion. If so, the entire loop will disappear.
bool = hasToPrimitiveSymbolSupport();
if ( typeof bool !== 'boolean' ) {
b.fail( 'should return a boolean' );
}
}
b.toc();
if ( !isBoolean( bool ) ) {
b.fail( 'should return a boolean' );
}
b.pass( 'benchmark finished' );
b.end();
});
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#!/usr/bin/env node

/**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var resolve = require( 'path' ).resolve;
var readFileSync = require( '@stdlib/fs/read-file' ).sync;
var CLI = require( '@stdlib/cli/ctor' );
var detect = require( './../lib' );


// MAIN //

/**
* Main execution sequence.
*
* @private
*/
function main() {
var flags;
var cli;

// Create a command-line interface:
cli = new CLI({
'pkg': require( './../package.json' ),
'options': require( './../etc/cli_opts.json' ),
'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
'encoding': 'utf8'
})
});

// Get any provided command-line options:
flags = cli.flags();
if ( flags.help || flags.version ) {
return;
}

console.log( detect() ); // eslint-disable-line no-console
}

main();
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@@ -0,0 +1,18 @@

{{alias}}()
Tests for native `Symbol.toPrimitive` support.

Returns
-------
bool: boolean
Boolean indicating if an environment has native `Symbol.toPrimitive`
support.

Examples
--------
> var bool = {{alias}}()
<boolean>

See Also
--------

Original file line number Diff line number Diff line change
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/*
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

// TypeScript Version: 4.1

/**
* Tests for native `Symbol.toPrimitive` support.
*
* @returns boolean indicating if an environment has `Symbol.toPrimitive` support
*
* @example
* var bool = hasToPrimitiveSymbolSupport();
* // returns <boolean>
*/
declare function hasToPrimitiveSymbolSupport(): boolean;


// EXPORTS //

export = hasToPrimitiveSymbolSupport;
Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
/*
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

import hasToPrimitiveSymbolSupport = require( './index' );


// TESTS //

// The function returns a boolean...
{
hasToPrimitiveSymbolSupport(); // $ExpectType boolean
}

// The compiler throws an error if the function is provided arguments...
{
hasToPrimitiveSymbolSupport( true ); // $ExpectError
hasToPrimitiveSymbolSupport( [], 123 ); // $ExpectError
}
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Usage: has-to-primitive-symbol-support [options]

Options:

-h, --help Print this message.
-V, --version Print the package version.

Original file line number Diff line number Diff line change
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{
"boolean": [
"help",
"version"
],
"alias": {
"help": [
"h"
],
"version": [
"V"
]
}
}
Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
/**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

var hasToPrimitiveSymbolSupport = require( './../lib' ); // eslint-disable-line id-length

var bool = hasToPrimitiveSymbolSupport();
if ( bool ) {
console.log( 'Environment has Symbol.toPrimitive support.' );
} else {
console.log( 'Environment lacks Symbol.toPrimitive support.' );
}
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