jQuery jQuery on()方法,jqueryon方法
jQuery jQuery on()方法,jqueryon方法
jQuery on()方法是官方推荐的绑定事件的一个方法。
$(selector).on(event,childSelector,data,function,map)
由此扩展开来的几个以前常见的方法有.
<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"); });
以上三种方法在jQuery1.8之后都不推荐使用,官方在1.9时已经取消使用live()方法了,所以建议都使用on()方法。
tip:如果你需要移除on()所绑定的方法,可以使用off()方法处理。
$(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()这个方法
$(document).ready(function(){ $("p").one("click",function(){ $(this).animate({fontSize:"+=6px"}); }); });
trigger()绑定
$(selector).trigger(event,eventObj,param1,param2,...)
$(document).ready(function(){ $("input").select(function(){ $("input").after(" Text marked!"); }); $("button").click(function(){ $("input").trigger("select"); }); });
多个事件绑定同一个函数
$(document).ready(function(){ $("p").on("mouseover mouseout",function(){ $("p").toggleClass("intro"); }); });
多个事件绑定不同函数
$(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");} }); });
绑定自定义事件
$(document).ready(function(){ $("p").on("myOwnEvent", function(event, showName){ $(this).text(showName + "! What a beautiful name!").show(); }); $("button").click(function(){ $("p").trigger("myOwnEvent",["Anja"]); }); });
传递数据到函数
function handlerName(event) { alert(event.data.msg); } $(document).ready(function(){ $("p").on("click", {msg: "You just clicked me!"}, handlerName) });
适用于未创建的元素
$(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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