cafe-grader-web Files · node_modules/es-abstract/2016/IsPromise.js

cafe-grader-web

Location: cafe-grader-web/node_modules/es-abstract/2016/IsPromise.js

Commit Description:

submission report

Commit Description:

submission report

References:

r790:7ddf708c67bd default

File last commit:

r789:8cd7e8db7e38 default

Show/Diff file:

Action:

            
                    node_modules/es-abstract/2016/IsPromise.js
                
             | 24 lines
             | 490 B
             | application/javascript 
             | JavascriptLexer
             | 
      
            History
        
           Show Full History
         |
          Annotation
         | Raw
         |
              
              Download
              
      'use strict';

      var callBound = require('../helpers/callBound');

      var $PromiseThen = callBound('Promise.prototype.then', true);

      var Type = require('./Type');

      // https://www.ecma-international.org/ecma-262/6.0/#sec-ispromise

      module.exports = function IsPromise(x) {

      	if (Type(x) !== 'Object') {

      		return false;

      	}

      	if (!$PromiseThen) { // Promises are not supported

      		return false;

      	}

      	try {

      		$PromiseThen(x); // throws if not a promise

      	} catch (e) {

      		return false;

      	}

      	return true;

      };

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository permissions settings

Sign in to your account

Last Author

				'use strict';

				var callBound = require('../helpers/callBound');

				var $PromiseThen = callBound('Promise.prototype.then', true);

				var Type = require('./Type');

				// https://www.ecma-international.org/ecma-262/6.0/#sec-ispromise

				module.exports = function IsPromise(x) {
				if (Type(x) !== 'Object') {
				return false;
				}
				if (!$PromiseThen) { // Promises are not supported
				return false;
				}
				try {
				$PromiseThen(x); // throws if not a promise
				} catch (e) {
				return false;
				}
				return true;
				};