Merge pull request #134 from vaadin/readme/polymer-cli-instruction

Add polymer-cli installation step to the dev guide
vaadin · Jun 13, 2018 · e4a43ba · e4a43ba
2 parents 6609278 + b7319e1
commit e4a43ba
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/README.md b/README.md
@@ -63,6 +63,8 @@ Vaadin components use the Lumo theme by default.
 
 1. When in the `vaadin-element` directory, run `npm install` and then `bower install` to install dependencies.
 
+1. Make sure you have [polymer-cli](https://www.npmjs.com/package/polymer-cli) installed globally: `npm i -g polymer-cli`.
+
 1. Run `polymer serve --open`, browser will automatically open the component API documentation.
 
 1. You can also open demo or in-browser tests by adding **demo** or **test** to the URL, for example: