onChange =() =>{}

render()
{
 let { data,searchInput } : any = this.state;
 if (searchInput) {
 data = data.filter((value:any) =>    // this fails when value is null, how can I prevent this
 {
       return value.val1.toLowerCase().includes(searchInput.toLowerCase()) ||
       value.val2.toLowerCase().includes(searchInput.toLowerCase()) |
 })
 return(
   <label>Search</label>
   <input type="text" value={this.state.val} onChange={this.onChange}/>
   <ReactTable
     data={data}
     columns={columns} // column config object
 )
}