How to create a toggle button with input=checkbox without using the <label> element?

Question

Is to create/transform a <input type="checkbox"> on a toggle button without needing the element <label> as in these examples:

• How to create a toggle on and toggle off button?

An example I made based on the code of Andreas Storm it was this:

body {
    background: #eee;
}

.toggle {
    margin-bottom: 20px;
}

.toggle > input {
    display: none;
}

.toggle > label {
    position: relative;
    display: block;
    height: 28px;
    width: 52px;
    background-color: #f7f7f7;
    border: 1px #a2e3e6 solid;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.toggle > label:after {
    position: absolute;
    left: 1px;
    top: 1px;
    display: block;
    width: 26px;
    height: 26px;
    border-radius: 100px;
    background: #fff;
    box-shadow: 0px 3px 3px rgba(0,0,0,0.05);
    content: '';
    transition: all 0.3s ease;
}
.toggle > label:active:after {
    transform: scale(1.15, 0.85);
}
.toggle > input:checked ~ label {
    background-color: #4cda64;
    border-color: #4cda64;
}
.toggle > input:checked ~ label:after {
    left: 25px;
}
.toggle > input:disabled ~ label {
    background-color: #d5d5d5;
    pointer-events: none;
}
.toggle > input:disabled ~ label:after {
    background-color: rgba(255, 255, 255, 0.3);
}

<div class="toggle">
    <input type="checkbox" id="foo">
    <label for="foo"></label>
</div>

<div class="toggle">
    <input type="checkbox" id="bar" checked>
    <label for="bar"></label>
</div>

<div class="toggle">
    <input type="checkbox" id="baz" disabled>
    <label for="baz"></label>
</div>

It would be possible to create something like this without label and without any other element (and without Javascript too)?

Answer 1

It is possible using two pseudo elements, the ::before and the ::after, will also need to use properties -webkit-appearance: and -moz-appearance: (and in the future appearance:).

In old Msedge (Edgehtml) and Internet Explorer this will not work, already in recent versions of Firefox, Webkit (Safari, iOS and Android) and Chrome browsers (and Chromium-based browsers, including current Msedge)

Should stay like this:

/*Adiciona border-box para o input e para os pseudo-elementos*/
input[type=checkbox], input[type=checkbox]::after, input[type=checkbox]::before {
    box-sizing: border-box;
}

/*Estiliza e remove a aparencia padrão do elemento*/
input[type=checkbox] {
    outline: none;
    position: relative;
    z-index: 1;
    margin: 2px;
    padding: 0;
    cursor: pointer;
    width: 48px;
    height: 24px;
    overflow: hidden;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/*cria os elementos before e after*/
input[type=checkbox]::before, input[type=checkbox]::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;

    /*efeito animado*/
    transition: left .15s cubic-bezier(.25, .8, .25, .1),
                transform .15s ease-in;
}

/*Cor padrão de quando o elemento não esta selecionado*/
input[type=checkbox]::before {
    background-color: #ccc;
    width: 100%;
    height: 100%;
    border-radius: 28px;
}

/*estiliza para parecer um botão toggle*/
input[type=checkbox]::after {
    margin: 2px 0 0 2px;
    background: #fff;
    width: 20px;
    height: 20px;
    border-radius: 100%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

/*troca a cor se estiver com a propriedade checked no html ou o usuário "checar"*/
input[type=checkbox]:checked::before {
    background-color: #75a940;
}

/*muda a posição do botão toggle se estiver checado*/
input[type=checkbox]:checked::after {
    left: 24px;
}

/*Efeito opicional de quando preciona o botão*/
input[type=checkbox]:active::after {
    transform: scale(1.15, 0.85);
}

/*Se o input tiver com o atributo disabled a cor é alterada*/
input[type=checkbox]:disabled::before {
     background-color: #b1b4b7 !important;
}

/*Se o input tiver com o atributo disabled a cor é alterada*/
input[type=checkbox]:disabled::after {
     background-color: #dcd8d8 !important;
}

/*OUTRAS CORES = Cores alternativas*/

input[type=checkbox].red:checked::before {
     background-color: #fd4554;
}

input[type=checkbox].blue:checked::before {
     background-color: #0f90dc;
}

input[type=checkbox].red:checked::before {
     background-color: #fd4554;
}

input[type=checkbox].purple:checked::before {
     background-color: #9e3eff;
}

<input type="checkbox">
<input type="checkbox" class="red">
<input type="checkbox" class="blue">
<input type="checkbox" class="purple">
<input type="checkbox" class="purple" disabled>

<hr>

<input type="checkbox" checked>
<input type="checkbox" class="red" checked>
<input type="checkbox" class="blue" checked>
<input type="checkbox" class="purple" checked>
<input type="checkbox" class="purple" checked disabled>

Answer 2

I have a similar option to Guilherme, but I give a all:unset in the checkbox first to clear all formatting default of user-agent

Then I stylize myself input the way you want it and use only the ::after. It worked in Chrome and Firefox, I believe that in Safari tb will work. In IE and Edge is not as expected.

OBS: From the point of view of accessibility, because it is an item of form without label, it would be interesting to assign a aria-label=" " in the ckeckbox saying what this btn is about. If you are interested here is the W3C recommendation on the subject https://www.w3.org/WAI/tutorials/forms/labels/

  .btn {
    all: unset;
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    background-color: #f00;
    border-radius: 15px;
    cursor: pointer;
    border: 1px solid #ccc;
    box-shadow: inset 0 0 5px 0 rgba(0,0,0,0.75);
    transition: background-color 100ms ease-in-out;
  }
  .btn:checked {
    background-color: #090;
  }
  .btn::after {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    box-sizing: border-box;
    border: 1px solid #666;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(0,0,0,0.5);
    background-image: radial-gradient(#fff 0%, #999 100%);
    top: 50%;
    left: 5px;
    transform: translateY(-50%) scale(1, 1);
    transition: left 200ms ease-in-out, transform 150ms ease-in-out;
  }
  .btn:checked::after {
    left: calc(100% - 25px);
  }
  .btn:active::after {
    transform: translateY(-50%) scale(1.15, 0.85);
  }

  <input class="btn" type="checkbox" aria-label="btn seleciona opção x">