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var
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www
/
greso.tech
/
server
/
nsm
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node_modules
/
type
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promise
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/var/www/greso.tech/server/nsm/node_modules/type/promise
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Name
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ensure.js
267
0644
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dl
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is.js
884
0644
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dl
rm
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/var/www/greso.tech/server/nsm/node_modules/type/promise/is.js
(884B)
"use strict"; var isPrototype = require("../prototype/is"); // In theory we could rely on Symbol.toStringTag directly, // still early native implementation (e.g. in FF) predated symbols var objectToString = Object.prototype.toString , objectTaggedString = objectToString.call(Promise.resolve()); module.exports = function (value) { if (!value) return false; // Sanity check (reject objects which do not expose common Promise interface) try { if (typeof value.then !== "function") return false; if (typeof value["catch"] !== "function") return false; } catch (error) { return false; } // Ensure its native Promise object (has [[PromiseState]] slot) // Note: it's not 100% precise as string tag may be overriden // and other objects could be hacked to expose it if (objectToString.call(value) !== objectTaggedString) return false; return !isPrototype(value); };
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