Passing 'event' value from html file to js file

Question

How to passing 'event' value from html file to js file. because in js, its not defined the event and openFile variable.

Html file:

 <form>
     <input type='file' id="poem" accept='text/plain' onchange='openFile(event)' >
 </form> 

js file:

function printPoem(event) {
    var openFile = function(event) {
         var input = event.target;
         var reader = new FileReader();
         reader.onload = function() {
             var text = reader.result;
         }
     }
}

Answer 1

您需要通过HTML传递this ，例如：

<form> <input type='file' id="poem" accept='text/plain' onchange='openFile(this)'></form>