jQuery jQuery on()方法，jqueryon方法
Jun 13, 2016 am 08:51 AM
jQuery jQuery on()方法，jqueryon方法
jQuery on()方法是官方推薦的綁定事件的一個(gè)方法。
$(selector).on(event,childSelector,data,function,map)
由此擴(kuò)展開(kāi)來(lái)的幾個(gè)以前常見(jiàn)的方法有.
<strong>bind()</strong>
$("p").bind("click",function(){
alert("The paragraph was clicked.");
});
$("p").on("click",function(){
alert("The paragraph was clicked.");
});
<strong>delegate()</strong>
$("#div1").on("click","p",function(){
$(this).css("background-color","pink");
});<br />
$("#div2").delegate("p","click",function(){
$(this).css("background-color","pink");
});
<strong>live()</strong>
$("#div1").on("click",function(){
$(this).css("background-color","pink");
});<br />
$("#div2").live("click",function(){
$(this).css("background-color","pink");
});
以上三種方法在jQuery1.8之后都不推薦使用，官方在1.9時(shí)已經(jīng)取消使用live()方法了，所以建議都使用on()方法。
tip:如果你需要移除on()所綁定的方法，可以使用off()方法處理。
$(document).ready(function(){
$("p").on("click",function(){
$(this).css("background-color","pink");
});
$("button").click(function(){
$("p").off("click");
});
});
tip:如果你的事件只需要一次的操作，可以使用one()這個(gè)方法
$(document).ready(function(){
$("p").one("click",function(){
$(this).animate({fontSize:"+=6px"});
});
});
trigger()綁定
$(selector).trigger(event,eventObj,param1,param2,...)
$(document).ready(function(){
$("input").select(function(){
$("input").after(" Text marked!");
});
$("button").click(function(){
$("input").trigger("select");
});
});
多個(gè)事件綁定同一個(gè)函數(shù)
$(document).ready(function(){
$("p").on("mouseover mouseout",function(){
$("p").toggleClass("intro");
});
});
多個(gè)事件綁定不同函數(shù)
$(document).ready(function(){
$("p").on({
mouseover:function(){$("body").css("background-color","lightgray");},
mouseout:function(){$("body").css("background-color","lightblue");},
click:function(){$("body").css("background-color","yellow");}
});
});
綁定自定義事件
$(document).ready(function(){
$("p").on("myOwnEvent", function(event, showName){
$(this).text(showName + "! What a beautiful name!").show();
});
$("button").click(function(){
$("p").trigger("myOwnEvent",["Anja"]);
});
});
傳遞數(shù)據(jù)到函數(shù)
function handlerName(event)
{
alert(event.data.msg);
}
$(document).ready(function(){
$("p").on("click", {msg: "You just clicked me!"}, handlerName)
});
適用于未創(chuàng)建的元素
$(document).ready(function(){
$("div").on("click","p",function(){
$(this).slideToggle();
});
$("button").click(function(){
$("<p>This is a new paragraph.</p>").insertAfter("button");
});
});
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