4 files changed, 27 insertions, 0 deletions
diff --git a/node_modules/es5-ext/math/sign/implement.js b/node_modules/es5-ext/math/sign/implement.js
new file mode 100644
index 000000000..bc7da14d1
--- /dev/null
+++ b/node_modules/es5-ext/math/sign/implement.js
@@ -0,0 +1,8 @@
+"use strict";
+
+if (!require("./is-implemented")()) {
+	Object.defineProperty(Math, "sign", { value: require("./shim"),
+		configurable: true,
+enumerable: false,
+writable: true });
+}
diff --git a/node_modules/es5-ext/math/sign/index.js b/node_modules/es5-ext/math/sign/index.js
new file mode 100644
index 000000000..9f2865643
--- /dev/null
+++ b/node_modules/es5-ext/math/sign/index.js
@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? Math.sign
+	: require("./shim");
diff --git a/node_modules/es5-ext/math/sign/is-implemented.js b/node_modules/es5-ext/math/sign/is-implemented.js
new file mode 100644
index 000000000..23ff83a6c
--- /dev/null
+++ b/node_modules/es5-ext/math/sign/is-implemented.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function () {
+	var sign = Math.sign;
+	if (typeof sign !== "function") return false;
+	return (sign(10) === 1) && (sign(-20) === -1);
+};
diff --git a/node_modules/es5-ext/math/sign/shim.js b/node_modules/es5-ext/math/sign/shim.js
new file mode 100644
index 000000000..760c69d12
--- /dev/null
+++ b/node_modules/es5-ext/math/sign/shim.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function (value) {
+	value = Number(value);
+	if (isNaN(value) || (value === 0)) return value;
+	return value > 0 ? 1 : -1;
+};