计算特定元素并使用jquery将计数添加到类名

Question

如何计算具有特定类的元素数量，并使用jquery将每个元素的计数添加为新的类名？

$('.full-screen').each(function(i) {
    $(this).addClass('.full-screen-', i);
});

我想创建：

<div class="full-screen full-screen-1"></div>
<div class="full-screen full-screen-2"></div>
<div class="full-screen full-screen-3"></div>
<div class="full-screen full-screen-4"></div>
<div class="full-screen full-screen-5"></div>

Answer 1

你可以做到

client__projects

＆＃13;

＆＃13;

$('.full-screen').each(function(i) {
    $(this).addClass('full-screen-'+(i+1));

});

＆＃13;

$('.full-screen').each(function(i) {
    $(this).addClass('full-screen-'+(i+1));
    console.log($(this)[0].outerHTML)
});

＆＃13;

＆＃13;

＆＃13;

Answer 2

此外，您可以使用.addClass( function )代替.each()

$('.full-screen').addClass(function(i) {
    return 'full-screen-'+(i+1);
});

＆＃13;

＆＃13;

$('.full-screen').addClass(function(i) {
    return 'full-screen-'+(i+1);
});
console.log($('.full-screen'))

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="full-screen"></div>
<div class="full-screen"></div>
<div class="full-screen"></div>
<div class="full-screen"></div>
<div class="full-screen"></div>

＆＃13;

＆＃13;

＆＃13;

Answer 3

试试这个

$(".full-screen").each(function((i){
    $(this).addClass("full-screen-" + (i+1));
});