1 files changed, 12 insertions, 0 deletions
diff --git a/node_modules/es5-ext/math/acosh/shim.js b/node_modules/es5-ext/math/acosh/shim.js
new file mode 100644
index 000000000..3e632ffba
--- /dev/null
+++ b/node_modules/es5-ext/math/acosh/shim.js
@@ -0,0 +1,12 @@
+"use strict";
+
+var log = Math.log, sqrt = Math.sqrt;
+
+module.exports = function (value) {
+	if (isNaN(value)) return NaN;
+	value = Number(value);
+	if (value < 1) return NaN;
+	if (value === 1) return 0;
+	if (value === Infinity) return value;
+	return log(value + sqrt(value * value - 1));
+};