for (child in this.props.children){
if (this.props.children[child].type.displayName != 'Card'){
console.log("Warning CardGroup has children that aren't Card components");
}
}
var CardGroup = React.createClass({
propTypes: {
children: function (props, propName, componentName) {
var error;
var prop = props[propName];
React.Children.forEach(prop, function (child) {
if (child.type.displayName !== 'Card') {
error = new Error(
'`' + componentName + '` only accepts children of type `Card`.'
);
}
});
return error;
}
},
render: function () {
return (
<div>{this.props.children}</div>
);
}
});
this.modifiedChildren = React.Children.map(children, child => {
if (React.isValidElement(child) && (child as React.ReactElement<any>).type === Card) {
let modifiedChild = child as React.ReactElement<any>;
// Modifying here
return modifiedChild;
}
// Returning other components / string.
// Delete next line in case you dont need them.
return child;
});
React.Children.forEach(props.children, (child, index) => {
if (React.isValidElement(child) && child.type !== Card) {
error = new Error(
'`' + componentName + '` only accepts children of type `Card`.'
);
}
});