From 86fa81acb7dfcf1dc3d6f5600cbf427ee44cf722 Mon Sep 17 00:00:00 2001
From: Karsten Schmidt <k@postspectacular.com>
Date: Fri, 8 Jan 2021 00:46:29 +0000
Subject: [PATCH] feat(strings): add stripAnsi(), lengthAnsi() fns

---
 packages/strings/src/ansi.ts  | 22 ++++++++++++++++++++++
 packages/strings/src/index.ts |  2 ++
 2 files changed, 24 insertions(+)
 create mode 100644 packages/strings/src/ansi.ts

diff --git a/packages/strings/src/ansi.ts b/packages/strings/src/ansi.ts
new file mode 100644
index 0000000000..b6155c45d9
--- /dev/null
+++ b/packages/strings/src/ansi.ts
@@ -0,0 +1,22 @@
+const RE = /\x1b\[[0-9;]+m/g;
+
+/**
+ * Removes all ANSI control sequences from given string.
+ *
+ * @example
+ * ```ts
+ * stripAnsi("\x1B[32mhello\x1B[0m \x1B[91mworld\x1B[0m!"");
+ * // 'hello world!'
+ * ```
+ *
+ * @param x
+ */
+export const stripAnsi = (x: string) => x.replace(RE, "");
+
+/**
+ * Returns length of `x` excluding any ANSI control sequences (via
+ * {@link stripAnsi}).
+ *
+ * @param x
+ */
+export const lengthAnsi = (x: string) => stripAnsi(x).length;
diff --git a/packages/strings/src/index.ts b/packages/strings/src/index.ts
index da5fdb4e5c..8d08ae5868 100644
--- a/packages/strings/src/index.ts
+++ b/packages/strings/src/index.ts
@@ -1,4 +1,6 @@
 export * from "./api";
+
+export * from "./ansi";
 export * from "./case";
 export * from "./center";
 export * from "./cursor";