Results 3 comments of Pavel D.

SassNinja look at Kryten0807 comment

Problem in source file index.js in 90 line: `this.setState({pictures: dataURLs, files: files}, () => { this.props.onChange(this.state.files, this.state.pictures); });` Callback call on parent method onChange. I don't undestand for what?

Temporarily solution is making global variable Set type. Thoose in ever drop/add image adding in it file name and check before adding. If file name is exist in Set return...