About stdlib...
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
tryRequire
Wrap
requirein a try/catch block.
Installation
npm install @stdlib/utils-try-requireUsage
var tryRequire = require( '@stdlib/utils-try-require' );tryRequire( id )
Wraps require in a try/catch block. If able to resolve a module id, the function returns the value bound to module.exports in the resolved module. Otherwise, the function returns an Error.
var x = tryRequire( 'beep' );
if ( x instanceof Error ) {
console.log( x.message );
}Notes
-
Use caution when attempting to resolve a relative path or a local module. This function attempts to resolve a module from its current path. Thus, the function is unable to resolve anything which is not along its search path. For local requires, use an absolute file path.
var resolve = require( 'path' ).resolve; var out = tryRequire( resolve( '/foo/bar/baz', '..', 'lib', 'beep.js' ) ); if ( out instanceof Error ) { console.error( out.message ); }
Examples
var tryRequire = require( '@stdlib/utils-try-require' );
var out = tryRequire( '_abcdefghijklmnopqrstuvwxyz123456789_' );
if ( out instanceof Error ) {
console.error( out.message );
} else {
throw new Error( 'expected an error' );
}
out = tryRequire( '@stdlib/utils-try-require' );
if ( out !== tryRequire ) {
throw new Error( 'expected export' );
}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
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.