diff options
author | isaacs <i@izs.me> | 2020-07-23 20:58:04 +0300 |
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committer | isaacs <i@izs.me> | 2020-07-29 21:53:42 +0300 |
commit | ad5e07d8bd86d1dbe2b03dc142f8c8d6f4828ffe (patch) | |
tree | 97b66f97d77f35774f10a5e3e9957b1897d150bb /node_modules/es-abstract/2015/IsPromise.js | |
parent | a16994cfdd2f255016f3d8ee60d03473d80eabd8 (diff) |
Full dependency reboot
Reinstall everything from a clean node_modules and package-lock.json
state.
Re-generate list of bundleDependencies and node_modules/.gitignore with
a script that does the right thing based on actual dependency state.
Diffstat (limited to 'node_modules/es-abstract/2015/IsPromise.js')
-rw-r--r-- | node_modules/es-abstract/2015/IsPromise.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2015/IsPromise.js b/node_modules/es-abstract/2015/IsPromise.js new file mode 100644 index 000000000..e8e92a2b8 --- /dev/null +++ b/node_modules/es-abstract/2015/IsPromise.js @@ -0,0 +1,24 @@ +'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; +}; |