Add doc about <Broadcast compareValues>

mjackson · mjackson · commit e20019bf282b · 2017-11-28T23:03:00.000-08:00
diff --git a/README.md b/README.md
@@ -100,6 +100,10 @@ class App extends React.Component {
 }
 ```
 
+By default `<Broadcast value>` values are compared using the `===` (strict equality) operator. To
+change this behavior, use `<Broadcast compareValues>` which is a function that takes the `prevValue`
+and `nextValue` and compares them. If `compareValues` returns `true`, no re-render will occur.
+
 You may prefer to wrap these components into channel-specific pairs to avoid typos and other
 problems with the indirection involved with the channel strings:
 

Original file line number	Diff line number	Diff line change
`@@ -100,6 +100,10 @@ class App extends React.Component {`
`100`	`100`	`}`
`101`	`101`	```
`102`	`102`
	`103`	+By default `<Broadcast value>` values are compared using the `===` (strict equality) operator. To
	`104`	+change this behavior, use `<Broadcast compareValues>` which is a function that takes the `prevValue`
	`105`	+and `nextValue` and compares them. If `compareValues` returns `true`, no re-render will occur.
	`106`	`+`
`103`	`107`	`You may prefer to wrap these components into channel-specific pairs to avoid typos and other`
`104`	`108`	`problems with the indirection involved with the channel strings:`
`105`	`109`