Add List Top-Level NPM Dependencies as a javascript til

javascript/list-top-level-npm-dependencies.md

@@ -0,0 +1,17 @@
+# List Top-Level NPM Dependencies
+
+The `npm ls` command can be used to list all dependencies for a project.
+This will, however, produce an exhaustive list of all dependencies including
+dependencies of dependencies. A list this large probably isn't going to be
+of much use.
+
+The `--depth` flag allows you to restrict the depth of the dependency tree
+that is generated.
+
+```bash
+$ npm ls --depth=0
+```
+
+This will produce a list of only the top-level dependencies.
+
+See `man npm-ls` for more details.