How do I fix "Expected to return a value at the end of arrow function" warning?

javascript reactjs ecmascript-6 redux react-redux
Ramzan Chasygov picture Ramzan Chasygov · Jul 10, 2017 · Viewed 114k times · Source

Everything works fine, but I have this warning Expected to return a value at the end of arrow function array-callback-return. I tried using forEach instead of map, but then <CommentItem /> doesn't even show. How do I fix this?

Answer

Zanon picture Zanon · Jan 14, 2018

A map() creates an array, so a return is expected for all code paths (if/elses).

If you don't want an array or to return data, use forEach instead.

Related questions

This.props.dispatch not a function - React-Redux

I am trying to dispatch an action from within my smart component. I've tried to use the mapDispatchToProps and this.props.dispatch(actions.getApplications(1)) but neither is binding the actions to props. Im not sure if it is because my …

Read More
When to use ES6 class based React components vs. functional ES6 React components?

After spending some time learning React I understand the difference between the two main paradigms of creating components. My question is when should I use which one and why? What are the benefits/tradeoffs of one over the other? ES6 …

Read More
Use reselect selector with parameters

How do I pass additional parameters to combined selectors? I am trying to • Get data • Filter data • Add custom value to my data set / group data by myValue export const allData = state => state.dataTable export const filterText = state => …

Read More