diff --git a/js/freq.ts b/js/freq.ts
new file mode 100644
index 0000000..ad78fda
--- /dev/null
+++ b/js/freq.ts
@@ -0,0 +1,3 @@
+
+// 判断是否为字符串
+typeof '' === 'string';
diff --git a/shell/docker.sh b/shell/docker.sh
new file mode 100644
index 0000000..f40f748
--- /dev/null
+++ b/shell/docker.sh
@@ -0,0 +1 @@
+# docker 常用命令