refactor: tidy up script load file

README.md

@@ -31,13 +31,13 @@ datasette install datasette-nteract-data-explorer
 - Use "advanced settings" mode to override the inferred column types. For example, you may want to treat a number as a "string" to be able to use it as a category.
 - See a [live demo](https://data-explorer.nteract.io/) of the original Nteract data-explorer component used in isolation.
 
-You can run the a minimal demo locally after installing the plugin
+You can run a minimal demo after the installation step
 
 ```bash
 datasette -i demo/happy_planet_index.db
 ```
 
-Or, run a copy of the demo site. This will contain additional plugins and metadata used in the [published demo](https://datasette-nteract-data-explorer.vercel.app).
+If you're interested in improving the demo site, you can run a copy of the site the extra metadata/plugins used in the [published demo](https://datasette-nteract-data-explorer.vercel.app).
 
 ```bash
 make run-demo
@@ -57,4 +57,4 @@ See [contributing docs](./docs/CONTRIBUTING.md).
 - Demo dataset from the [Happy Planet Index](https://happyplanetindex.org/) was cleaned by Doris Lee. This dataset was chosen because of its global appeal, modest size, and variety in column datatypes (numbers, low cardinality and high cardinality strings, booleans).
 - Hosting for the demo site is provided by Vercel.
 
-[![site hosted by vercel logo](https://www.datocms-assets.com/31049/1618983297-powered-by-vercel.svg)](https://vercel.com/?utm_source=datasette-visualization-plugin-demos&utm_campaign=oss)
+[![site hosted by vercel](https://www.datocms-assets.com/31049/1618983297-powered-by-vercel.svg)](https://vercel.com/?utm_source=datasette-visualization-plugin-demos&utm_campaign=oss)

demo/demo-plugins/footer.py

@@ -1,8 +1,10 @@
 from datasette import hookimpl
-import os
+from os import path
+
+# Store JS in separate file to enable basic IDE hinting support
+script_name = path.join(path.dirname(__file__), "footer.js")
+SCRIPT = open(script_name).read()
 
-#  set variable named script  equal to contents of footer.js\
-SCRIPT = open(os.path.join(os.path.dirname(__file__), "footer.js")).read()
 
 @hookimpl
 def extra_body_script():