如何克隆和更改ID? [英] How to clone and change id?

问题描述

我需要克隆 id，然后在它后面添加一个数字，例如 id1、id2 等.每次点击 clone 时，您都将克隆放在最新的之后身份证号码.

I need to clone the id and then add a number after it like so id1, id2, etc. Every time you hit clone you put the clone after the latest number of the id.

$("button").click(function() {
    $("#id").clone().after("#id");
}); 

推荐答案

$('#cloneDiv').click(function(){


  // get the last DIV which ID starts with ^= "klon"
  var $div = $('div[id^="klon"]:last');

  // Read the Number from that DIV's ID (i.e: 3 from "klon3")
  // And increment that number by 1
  var num = parseInt( $div.prop("id").match(/\d+/g), 10 ) +1;

  // Clone it and assign the new ID (i.e: from num 4 to ID "klon4")
  var $klon = $div.clone().prop('id', 'klon'+num );

  // Finally insert $klon wherever you want
  $div.after( $klon.text('klon'+num) );

});

<script src="https://code.jquery.com/jquery-3.1.0.js"></script>

<button id="cloneDiv">CLICK TO CLONE</button> 

<div id="klon1">klon1</div>
<div id="klon2">klon2</div>

假设您有许多 ID 为 klon--5 之类的元素，但它们是乱码(不按顺序).这里我们不能去:last或:first，因此我们需要一种机制来检索最高ID:

Say you have many elements with IDs like klon--5 but scrambled (not in order). Here we cannot go for :last or :first, therefore we need a mechanism to retrieve the highest ID:

const all = document.querySelectorAll('[id^="klon--"]');
const maxID = Math.max.apply(Math, [...all].map(el => +el.id.match(/\d+$/g)[0]));
const nextId = maxID + 1;

console.log(`New ID is: ${nextId}`);

<div id="klon--12">12</div>
<div id="klon--34">34</div>
<div id="klon--8">8</div>

这篇关于如何克隆和更改ID?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！