No results if no category specified

[billerickson]

I used the following shortcode: [display-posts-remote url="https://www.billerickson.net"]

This generated a GET request to https://www.billerickson.net/wp-json/wp/v2/posts?_embed&categories=0&per_page=10&order=desc&orderby=date

I then get the no posts message because I don't have any posts in category with ID = 0.

When I change:

if ( ! empty( $atts['category_id'] ) ) {

To

if ( ! empty( $atts['category_id'] ) && ( is_array( $atts['category_id'] ) || false !== filter_var( $atts['category_id'], FILTER_VALIDATE_BOOLEAN ) ) ) {

It works. This will ensure the variable isn't anything falsey, like 0, false, and "false".

The last one is important for shortcodes because someone could type [display-posts-remote category_id="false"]

[Ramin-Farhadi]

You could've simply change the 0 to '' it is easier and simpler. I have made a fork from the original app.
83b4e5d