Reacjs Error: The `style` prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + ’em’}} when using JSX

This error occurs when you try to pass regular CSS strings to the style attribute of an HTML element. In React, the styling is different, instead of an string the style attribute expects an object.

So instead of doing this:

<p style="font-size: 12px; color: black" >text</p>

you should do this:

var pStyle {
   fontSize: '12px',
   color: 'black',
<p style={pStyle} >text</p>

Note that the name of some CSS attributes are a little bit different in React, you should always write them camelCased. As you can see in this example the font-size attribute became fontSize.

That’s pretty much it! Hope it helps.

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