JQuery on () method, jqueryon Method

JQuery on () method, jqueryon Method

The jQuery on () method is officially recommended to bind events.

$(selector).on(event,childSelector,data,function,map)

Several common methods that were extended previously were.

bind()　　$("p").bind("click",function(){　　　　alert("The paragraph was clicked.");　　});　　$("p").on("click",function(){　　　　alert("The paragraph was clicked.");　　});delegate()　　$("#div1").on("click","p",function(){　　　　$(this).css("background-color","pink");　　});
　　$("#div2").delegate("p","click",function(){　　　　$(this).css("background-color","pink");　　});live()　　$("#div1").on("click",function(){　　　　$(this).css("background-color","pink");　　});
　　$("#div2").live("click",function(){　　　　$(this).css("background-color","pink");　　});

The preceding three methods are not recommended after jQuery1.8. The live () method has been canceled at 1.9. Therefore, we recommend that you use the on () method.

Tip: If you need to remove the method bound to on (), you can use the off () method for processing.

$(document).ready(function(){　　$("p").on("click",function(){　　　　$(this).css("background-color","pink");　　});　　$("button").click(function(){　　　　$("p").off("click");　　});});

Tip: If your event only requires one operation, you can use the one () method.

$(document).ready(function(){　　$("p").one("click",function(){　　　　$(this).animate({fontSize:"+=6px"});　　});});

Trigger () Binding

$(selector).trigger(event,eventObj,param1,param2,...)

$(document).ready(function(){　　$("input").select(function(){　　　　$("input").after(" Text marked!");　　});　　$("button").click(function(){　　　　$("input").trigger("select");　　});});

Bind multiple events to the same function

$(document).ready(function(){  $("p").on("mouseover mouseout",function(){    $("p").toggleClass("intro");  });});

Bind multiple events to different functions

$(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");}    });});

Bind custom events

$(document).ready(function(){  $("p").on("myOwnEvent", function(event, showName){    $(this).text(showName + "! What a beautiful name!").show();  });  $("button").click(function(){    $("p").trigger("myOwnEvent",["Anja"]);  });});

Transfer Data to Functions

function handlerName(event) {  alert(event.data.msg);}$(document).ready(function(){  $("p").on("click", {msg: "You just clicked me!"}, handlerName)});

Applicable to uncreated Elements

$(document).ready(function(){  $("div").on("click","p",function(){    $(this).slideToggle();  });  $("button").click(function(){    $("<p>This is a new paragraph.</p>").insertAfter("button");  });});