@stdlib/utils-define-read-only-accessor

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Read-Only Accessor

Define a read-only accessor.

Installation

npm install @stdlib/utils-define-read-only-accessor

Usage

var setReadOnlyAccessor = require( '@stdlib/utils-define-read-only-accessor' );

setReadOnlyAccessor( obj, prop, getter )

Defines a read-only accessor.

function getter() {
    return 'bar';
}

var obj = {};

setReadOnlyAccessor( obj, 'foo', getter );

obj.foo = 'boop';
// throws <Error>

Notes

• Read-only accessors are enumerable and non-configurable.

Examples

var setReadOnlyAccessor = require( '@stdlib/utils-define-read-only-accessor' );

function Foo( name ) {
    if ( !(this instanceof Foo) ) {
        return new Foo( name );
    }
    setReadOnlyAccessor( this, 'name', getName );
    return this;

    function getName() {
        return name;
    }
}

var foo = new Foo( 'beep' );

try {
    foo.name = 'boop';
} catch ( err ) {
    console.error( err.message );
}

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See Also

• @stdlib/utils-define-read-only-property: define a read-only property.
• @stdlib/utils-define-read-write-accessor: define a read-write accessor.
• @stdlib/utils-define-write-only-accessor: define a write-only accessor.

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Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, 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.