JQuery统计input和textarea文字输入数量(代码分享)

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$(function(){ 
 /*input字数*/
 /*在页面刚载入时先显示出输入框的字数*/
 var text1=$("#detail1").val();
 var counter1=text1.length;
 $("#detail1_num").text(counter1);
 /*添加触发事件进行动态计算输入框的字数*/
 $("#detail1").on('blur keyup input',function(){
 var text=$("#detail1").val();
 var counter=text.length;
 $("#detail1_num").text(counter);
 });
 /* textarea字数*/
 var text2=$("#detail2").val();
 var counter2=text2.length;
 $("#detail2_num").text(counter2);
 $("#detail2").on('blur keyup input',function(){
 var text=$("#detail2").val();
 var counter=text.length;
 $("#detail2_num").text(counter);
 });
});