Joshua Rajandiran Joshua Rajandiran - 4 months ago 69
React JSX Question

How to properly pass custom data attribute props to child components?

Basically I have 3 custom attributes

data-pageName
,
data-defaultOption
,
data-options
.

The problem I have is that when I pass into my child component I get an unexpected token error because its something like this:

const pageContent = ({data-pageName, name, onChange, data-defaultOption, value, data-options}) => {
/*return here*/
};


Basically the
-
symbol is causing the error.

How do I include it as
data-pageName
and not read as
data
-
pageName
?

This is how I call the component:

<pageContent data-pageName={this.state.pageClicked} onChange={this.closeMenu} data-defaultOption={this.state.tmpDefaultOption} value={this.state.tmpValue} data-error={this.state.tmpError} data-options='a'/>

Answer

Dashes are not allowed in variable names. So, you have to use quotes ''

const Example = (props) =>
  <div>{props['data-name']}</div>

ReactDOM.render(
  <Example data-name="hello"/>,
  document.getElementById('app')
)
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="app" />