Not being able to set state for a selected date from a DatePicker

Question

So I am having trouble with setting the state for the date selected from this DatePicker change: change = (e) => { this.setState({ [e.target.name]: e.target.value, }); }; DatePicker component: this.change(e)} /> If I use the default date when you first reload the page, there is no issue. But it's when a date is selected that I get an error. A Type Error: Cannot read property 'name' of undefined. What am I doing wrong? JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

The SyntheticEvent is pooled. This means that the SyntheticEvent object will be reused and all properties will be nullified after the event callback has been invoked. This is for performance reasons. As such, you cannot access the event in an asynchronous way. More information can be found here. Since setState is asynchronous the event will be null by the time it's evaluated in setState. Instead, deconstruct the event before setState: change = ({ target: { name, value } }) => { this.setState({ [name]: value, }); } or change = e => { const { name, value } = e.target; this.setState({ [name]: value, }); }