Docs

1 files changed, 24 insertions, 0 deletions

diff --git a/node_modules/universalify/index.js b/node_modules/universalify/index.js
new file mode 100644
index 0000000..233beac
--- /dev/null
+++ b/node_modules/universalify/index.js
@@ -0,0 +1,24 @@
+'use strict'
+
+exports.fromCallback = function (fn) {
+  return Object.defineProperty(function (...args) {
+    if (typeof args[args.length - 1] === 'function') fn.apply(this, args)
+    else {
+      return new Promise((resolve, reject) => {
+        args.push((err, res) => (err != null) ? reject(err) : resolve(res))
+        fn.apply(this, args)
+      })
+    }
+  }, 'name', { value: fn.name })
+}
+
+exports.fromPromise = function (fn) {
+  return Object.defineProperty(function (...args) {
+    const cb = args[args.length - 1]
+    if (typeof cb !== 'function') return fn.apply(this, args)
+    else {
+      args.pop()
+      fn.apply(this, args).then(r => cb(null, r), cb)
+    }
+  }, 'name', { value: fn.name })
+}