document options

yyx990803 · yyx990803 · commit 5bff23b7d763 · 2018-01-23T22:35:51.000-05:00
diff --git a/README.md b/README.md
@@ -2,13 +2,41 @@
 
 This is a fork based on [style-loader](https://github.com/webpack/style-loader). Similar to `style-loader`, you can chain it after `css-loader` to dynamically inject CSS into the document as style tags. However, since this is included as a dependency and used by default in `vue-loader`, in most cases you don't need to configure this loader yourself.
 
-### Differences from `style-loader`
+## Options
 
-#### Server-Side Rendering Support
+- **manualInject** (3.1.0+):
+
+  Type: `boolean`. When importing the style from a non-vue-file, by default the style is injected as a side effect of the import. When `manualInject` is true, the imported style object exposes a `__inject__` method, which can then be called manually at appropriate timing. If called on the server, the method expects one argument which is the `ssrContext` to attach styles to.
+
+  ``` js
+  import styles from 'styles.scss'
+
+  export default {
+    beforeCreate() { // or create a mixin for this purpose
+      if(styles.__inject__) {
+        styles.__inject__(this.$ssrContext)
+      }
+    }
+
+    render() {
+      return <div class={styles.heading}>Hello World</div>
+    }
+  }
+  ```
+
+  Note this behavior is enabled automatically when `vue-style-loader` is used on styles imported within a `*.vue` file. The option is only exposed for advanced usage.
+
+- **ssrId** (3.1.0+):
+
+  Type: `boolean`. Add `data-vue-ssr-id` attribute to injected `<style>` tags even when not in Node.js. This can be used with pre-rendering (instead of SSR) to avoid duplicate style injection on hydration.
+
+## Differences from `style-loader`
+
+### Server-Side Rendering Support
 
 When bundling with `target: 'node'`, the styles in all rendered components are collected and exposed on the Vue render context object as `context.styles`, which you can simply inline into your markup's `<head>`. If you are building a Vue SSR app, you probably should use this loader for CSS imported from JavaScript files too.
 
-#### Misc
+### Misc
 
 - Does not support url mode and reference counting mode. Also removed `singleton` and `insertAt` query options. It always automatically pick the style insertion mechanism that makes most sense. If you need these capabilities you should probably use the original `style-loader` instead.
 
