README.md

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isReadableProperty

Test if an object's own property is readable.

Usage

import isReadableProperty from 'https://cdn.jsdelivr.net/gh/stdlib-js/assert-is-readable-property@deno/mod.js';

isReadableProperty( value, property )

Returns a boolean indicating if a value has a readable property.

import defineProperty from 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-define-property@deno/mod.js';

var obj = {
    'foo': 'bar'
};

defineProperty( obj, 'beep', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'boop'
});

defineProperty( obj, 'setter', {
    'configurable': false,
    'enumerable': false,
    'set': function setter( v ) {
        obj.foo = v;
    }
});

var bool = isReadableProperty( obj, 'foo' );
// returns true

bool = isReadableProperty( obj, 'beep' );
// returns true

bool = isReadableProperty( obj, 'setter' );
// returns false

Notes

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

  var bool = isReadableProperty( 'beep', 'length' );
  // returns true

• Property arguments are coerced to strings.

  var obj = {
      'null': 'foo'
  };
  
  var bool = isReadableProperty( obj, null );
  // returns true

Examples

import isReadableProperty from 'https://cdn.jsdelivr.net/gh/stdlib-js/assert-is-readable-property@deno/mod.js';

var bool = isReadableProperty( [ 'a' ], 'length' );
// returns true

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

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

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

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

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

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

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

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

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See Also

• @stdlib/assert-is-read-only-property: test if an object's own property is read-only.
• @stdlib/assert-is-read-write-property: test if an object's own property is readable and writable.
• @stdlib/assert-is-readable-property-in: test if an object's own or inherited property is readable.
• @stdlib/assert-is-writable-property: test if an object's own property is writable.

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Notice

This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.