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---
id: style-prop-value-px
title: Shorthand for Specifying Pixel Values in style props
layout: cookbook
permalink: style-props-value-px.html
prev: jsx-root-node-count.html
next: children-props-type.html
---
When specifying a pixel value for your inline `style` prop, React automatically appends the string "px" for you after your number value, so this works:
```js
/** @jsx React.DOM */
var divStyle = {height: 10}; // rendered as "height:10px"
React.renderComponent(<div style={divStyle}>Hello World!</div>, mountNode);
```
See [Inline Styles](/react/docs/cookbook/inline-styles-tip.html) for more info.
Sometimes you _do_ want to keep the CSS properties unitless. Here's a list of properties that won't get the automatic "px" suffix:
- fillOpacity
- fontWeight
- lineHeight
- opacity
- orphans
- zIndex
- zoom