How to use an if within a map in react.js? [duplicate]

Question

I have this function where I have this piece of code, but it does not return anything, just leave blank

mostrarPostsNoValidos() {
    if(this.state.posts.length > 0) {
        this.state.posts.map((post, key) => {
            if(post.validado === "0"){
                return (
                    <a href={`/post/${post.id}/${post.slug}`} key={key}>
                        <div className="card post">
                            <div className="card-body">
                                {post.titulo}
                            </div>
                        </div>
                    </a>
                );
            }
        });
    } else {
        return <h3>No hay posts que mostrar aún</h3>
    }
}

Your return statement is returning from map's callback function. Your outer function mostrarPostsNoValidos doesn't return anything if if condition is equal to true. Just add return on the third line before map invocation. Although, I should mention that map is not the perfect suit for your case. More like reduce or you'll have to wrap map within filter. — Dan Karbayev
– Dan Karbayev, Commented Jun 12, 2018 at 20:09

Luis Contreras Guerra · Accepted Answer · 2018-06-12 20:11:11Z

0

Solution: add "return this.state.posts.map"

mostrarPostsNoValidos() {
    if(this.state.posts.length > 0) {
        return this.state.posts.map((post, key) => {
            if(post.validado === "0"){
                return (
                    <a href={`/post/${post.id}/${post.slug}`} key={key}>
                        <div className="card post">
                            <div className="card-body">
                                {post.titulo}
                            </div>
                        </div>
                    </a>
                );
            }
        });
    } else {
        return <h3>No hay posts que mostrar aún</h3>
    }
}

answered Jun 12, 2018 at 20:11

Luis Contreras Guerra

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1 Comment

wiesion Over a year ago

Not even citing where you got the solution from - to your own question..

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