Add readme

Author: developit

packages/babel-plugin-transform-jsx-to-tagged-templates/README.md

@@ -0,0 +1,47 @@
+# babel-plugin-transform-jsx-to-tagged-templates
+
+This plugin converts JSX into Tagged Templates that work with things like [htm] and [lit-html].
+
+```js
+// INPUT:
+const Foo = () => <h1>Hello</h1>
+
+// OUTPUT:
+const Foo = () => html`<h1>Hello</h1>`
+```
+
+## Installation
+
+Grab it from npm:
+
+```sh
+npm i -D babel-plugin-transform-jsx-to-tagged-templates
+```
+
+... then add it to your Babel config (eg: `.babelrc`):
+
+```js
+"plugins": [
+  "babel-plugin-transform-jsx-to-tagged-templates"
+  ]
+]
+```
+
+## Options
+
+There's only one option: `tag`. It lets you specify the function to use for prefixing templates. The default is "html":
+
+```js
+"plugins": [
+    [
+      "babel-plugin-transform-jsx-to-tagged-templates",
+      {
+        "tag": "custom.html"
+      }
+    ]
+  ]
+]
+```
+
+[htm]: https://github.com/developit/htm
+[lit-html]: https://github.com/polymer/lit-html