Document.addEventListener usage introduction_javascript skills

document.addEventListener("Event name", function, false);

Copy code The code is as follows:

function a function (event){
// method execution
}

The last parameter in addEventListener determines the response order of the event;

if true The order of event execution is addEventListener ---- the onclick event of the label ---- document.onclick

If it is false, the order of events is the onclick event of the label ---- document.onclick ---- addEventListener

is understood as the call entry point for other codes