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README.md

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+# koa-response-jsonp
+
+koa jsonp middleware
+
+## Install
+
+```shell
+npm install koa-response-jsonp --save
+```
+
+## Usage
+
+```javascript
+const koa = require('koa');
+const app = koa();
+const jsonp = require('koa-response-jsonp');
+
+jsonp(app);
+
+app.use(function *() {
+	this.jsonp({
+		success: true
+	});
+});
+
+app.listen(3000);
+```
+
+then you request `http://localhost:3000?callback=fn` will response:
+
+```javascript
+fn({"success":true})
+```
+
+custom callback functoin name:
+
+```javascript
+jsonp(app, {
+	callbackFn: 'cb'
+});
+```