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on why module level variables do not work as singletons
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David Baker
2017-09-08 17:43:41 +01:00
parent a012dbafce
commit 81871c50be
1 changed files with 3 additions and 0 deletions
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src/Skinner.js
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@@ -84,6 +84,9 @@ class Skinner {
// behaviour with multiple copies of files etc. is erratic at best. // behaviour with multiple copies of files etc. is erratic at best.
// XXX: We can still end up with the same file twice in the resulting // XXX: We can still end up with the same file twice in the resulting
// JS bundle which is nonideal. // JS bundle which is nonideal.
// See https://derickbailey.com/2016/03/09/creating-a-true-singleton-in-node-js-with-es6-symbols/
// or https://nodejs.org/api/modules.html#modules_module_caching_caveats
// ("Modules are cached based on their resolved filename")
if (global.mxSkinner === undefined) { if (global.mxSkinner === undefined) {
global.mxSkinner = new Skinner(); global.mxSkinner = new Skinner();
} }