React: Expected an assignment or function call and instead saw an expression

Question

I am trying to fix this lint error at line const def = (props) => { in following sample code.

const propTypes = {
prop1: PropTypes.string,
pr         


        

Answer 1

In my case the problem was the line with default instructions in switch block:

  handlePageChange = ({ btnType}) => {
    let { page } = this.state;
    switch (btnType) {
      case 'next':
        this.updatePage(page + 1);
        break;
      case 'prev':
        this.updatePage(page - 1);
        break;
      default: null;
    } 
  }

Instead of

default: null;

The line

default: ;

worked for me.