Event global object in Firefox [duplicate]

问题

This question already has answers here:

ReferenceError: event is not defined error in Firefox (2 answers)

Closed 3 years ago.

Consider the following code:

<input id="myinput" type="text" size="40" onkeydown="myFunction()">

function myFunction() {
  console.log(event);
}

event is a global object and is known inside the event handler myFunction. However, Firefox throws an error:event is not defined while Chrome and IE output KeyboardEvent {...}. This is one of the most crazy things I have met. Any satisfactory explanation?

回答1:

Firefox's KeyboardEvent() expect event passed to the function Try this

<input id="myinput" type="text" size="40" onkeydown="myFunction(event)">

function myFunction(event){
    if(typeof event === 'undefined')
    {
        event = window.event;
    }

console.log(event);

}

来源：https://stackoverflow.com/questions/37367752/event-global-object-in-firefox