Added a fallback Array.prototype.flat implementation (#935)

Fixes #647. Signed-off-by: Boris Krivonog <boris.krivonog@inova.si>
openhab · Apr 18, 2021 · 2142c8e · 2142c8e
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diff --git a/bundles/org.openhab.ui/web/src/js/app.js b/bundles/org.openhab.ui/web/src/js/app.js
@@ -1,3 +1,5 @@
+import './compatibility'
+
 // Import Vue
 import Vue from 'vue'
 

diff --git a/bundles/org.openhab.ui/web/src/js/compatibility.js b/bundles/org.openhab.ui/web/src/js/compatibility.js
@@ -0,0 +1,9 @@
+
+if (!Array.prototype.flat) {
+  // eslint-disable-next-line no-extend-native
+  Array.prototype.flat = function (depth = 1) {
+    return this.reduce(function (flat, toFlatten) {
+      return flat.concat((Array.isArray(toFlatten) && (depth > 1)) ? toFlatten.flat(depth - 1) : toFlatten)
+    }, [])
+  }
+}