Add CSS !important Is Not Supported By Inline Styles as a react til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_705 TILs and counting..._
+_706 TILs and counting..._
 
 ---
 
@@ -471,6 +471,7 @@ _705 TILs and counting..._
 - [Create Dynamically Named Custom React Components](react/create-dynamically-named-custom-react-components.md)
 - [create-react-app Comes With Lodash](react/create-react-app-comes-with-lodash.md)
 - [create-react-app Has A Default Test Setup File](react/create-react-app-has-a-default-test-setup-file.md)
+- [CSS !important Is Not Supported By Inline Styles](react/css-important-is-not-supported-by-inline-styles.md)
 - [Debug Jest Tests In create-react-app](react/debug-jest-tests-in-create-react-app.md)
 - [Defining State In A Simple Class Component](react/defining-state-in-a-simple-class-component.md)
 - [Destructure Variables As Props To A Component](react/destructure-variables-as-props-to-a-component.md)

react/css-important-is-not-supported-by-inline-styles.md

@@ -0,0 +1,18 @@
+# CSS !important Is Not Supported By Inline Styles
+
+You can get pretty far with React's inline styling of components. There are
+however a few limitations. One such limitation is that the `!important`
+clause is not supported.
+
+If you try applying `!important` to an inline style like so:
+
+```jsx
+<div style={{ color: "red !important" }}>
+  My div
+</div>
+```
+
+You'll be disappointed when you open up the browser and inspect that `div`
+tag. The `color` rule will be ignored and excluded from the output html.
+
+[source](https://github.com/facebook/react/issues/1881)