ReactJS send key(index) on click

Question

I want to send element's index on click in function. Because I should change data for every element and get it from array.

How can I get key in MainBlock from List? Is it possible? Or I do something wrong?

I'm very new in React and do many mistakes.

var MainBlock = React.createClass({
Click: function() {
    // I need to get element KEY
    // var data = array[key]
},
render: function() {
    return (
        <List Click={this.props.Click.bind(null, this)}>
    );
}
});

var List = React.createClass({
    render: function() {
        var ItemNodes = this.props.data.map(function(step, index) {
            return (
                <Item className="class" Click={this.props.Click.bind(null, this)} key={index} />
            );
        }.bind(this));
        return (
            <ul>
                {ItemNodes}
            </ul>
        );
    }
});

var StepWindow = React.createClass({
    render: function() {
        return (
            <li onClick={this.props.Click}>
                yo!
            </li>
        );
    }
});

Thank you for your help.

jolyonruss · Accepted Answer · 2016-08-10 12:36:11Z

7

Try this:

Click={this.props.Click.bind(this, index)}

Click: function(idx, e){

}

check out the boundClick in the docs example http://facebook.github.io/react/tips/expose-component-functions.html

edit I've edited this to show that the parameters passed to the Click function are in the different order. It was e, idx and should be idx, e.

edited Aug 10, 2016 at 12:36

jolyonruss

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answered Feb 6, 2015 at 7:41

silverfighter

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1 Comment

user1082679 Over a year ago

You have the order wrong. It is Click: function(idx, e) { }

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