Created
March 19, 2013 09:26
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placeholder占位符 jquery 插件
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(function(){ | |
/** | |
* 占位符 | |
* @param {object} obj lable对象 | |
* @return | |
*/ | |
$.fn.placeholder = function(obj) { | |
return $(this).each(function(){ | |
var _self = $(this); | |
// 获取lable对象,未配置默认按结构查找 | |
var lebleObj = (obj == undefined) ? _self.siblings("lable") : obj; | |
// 绑定输入框 聚焦和失焦动作 | |
_self.on("focus blur",function(event){ | |
// 获取输入框当前值 | |
var thisValue = $(this).val(); | |
// 判断事件类型分别进行处理 | |
if(event.type == "focus"){ | |
// 输入框聚焦默认隐藏lable | |
lebleObj.hide(); | |
}else{ | |
// 输入框失焦时根据值是否为空控制lable显示 | |
($.trim(thisValue) == "") ? lebleObj.show() : ''; | |
} | |
}); | |
// lable对象被点击触发输入框聚焦 | |
lebleObj.on("click",function(){ _self.trigger("focus"); }); | |
}); | |
}; | |
})(); |
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