JSX Syle - Using Inline CSS in JSX

In order to define inline jsx style on React nodes you need to pass the style prop/attribute a JavaScript object or reference to an object containing CSS properties and values.

In the code below I first setup a JavaScript object, named styles, containing jsx inline style. Then I use the { } brackets to reference the object that should be used for the value of the style prop/attribute (e.g., style={styles}).

source code

Notice that, the react inline CSS properties are in a camelCased form similar to what is used when writing CSS properties in JavaScript. This is required because JavaScript does not allow hyphens in names.

When the above React JSX code is transformed by Babel, and then parsed by a JavaScript engine, the resulting HTML will be:

<div style="color:red;background-color:black;font-weight:bold;" data-reactid=".0">test</div>

JSX Inline Style, React Inline CSS, React Styles


  • Vendor prefixes other than ms should begin with a capital letter. This is why WebkitTransition has an uppercase "W".
  • CamelCased CSS properties shouldn't be a suprise given this is how it is done when accessing properties on DOM nodes from JS (e.g., document.body.style.backgroundImage)
  • When specifying a pixel value React will automatically append the string "px" for you after your number value except for the following properties:
columnCount fillOpacity flex flexGrow flexShrink fontWeight lineClamp lineHeight
opacity order orphans strokeOpacity widows zIndex zoom

Jump to React CreateElement, react force rerender or use the menu.

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