[英]How to get the parameter to work inside a event function
當我想取消綁定事件時,我將代碼包裝在一個函數中,但是當我需要查看按下哪個鍵時,我需要獲取該事件的事件(不確定如何調用)。
//正常的例子
$('body').on('keydown',function( event ){
if(event.keyCode == 37){
// do something
}
});
//我的例子
function keyDownHandler() {
if(event.keyCode == 39) {
// does not work
}
}
$('body').on('keydown', keyDownHandler);
您需要獲取事件對象,可以將其作為回調函數參數獲取
function keyDownHandler(event) {
// set it here ----^^^^^^---
if(event.keyCode == 39) {
// works now
}
}
$('body').on('keydown', keyDownHandler);
$(document).ready(function () {
//1st way
$('body').on('keydown', function(event){
keyDownHandler(event);
});
//2nd way ,same as first but shorter use it for send event only
$('body').on('keydown', keyDownHandler);
//3rd way ,this way to send more data
$('body').on('keydown', {example:'hello world'},keyDownHandler2);
});
function keyDownHandler(event) {
console.log(event.keyCode);
}
function keyDownHandler2(event) {
console.log(event.keyCode);
console.log(event.data.example);
}
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