How to Create a Checkbox With a Clickable Label

How to create a checkbox with a clickable label?

Method 1: Wrap Label Tag

Wrap the checkbox within a label tag:

<label><input type="checkbox" name="checkbox" value="value">Text</label>

Method 2: Use the `for` Attribute

Use the for attribute (match the checkbox id):

<input type="checkbox" name="checkbox" id="checkbox_id" value="value">
<label for="checkbox_id">Text</label>

NOTE: ID must be unique on the page!

Explanation

Since the other answers don't mention it, a label can include up to 1 input and omit the for attribute, and it will be assumed that it is for the input within it.

Excerpt from w3.org (with my emphasis):

[The for attribute] explicitly associates the label being defined with another control. When present, the value of this attribute must be the same as the value of the id attribute of some other control in the same document. When absent, the label being defined is associated with the element's contents.
To associate a label with another control implicitly, the control element must be within the contents of the LABEL element. In this case, the LABEL may only contain one control element. The label itself may be positioned before or after the associated control.

Using this method has some advantages over for:

No need to assign an id to every checkbox (great!).
No need to use the extra attribute in the <label>.
The input's clickable area is also the label's clickable area, so there aren't two separate places to click that can control the checkbox - only one, no matter how far apart the <input> and actual label text are, and no matter what kind of CSS you apply to it.

Demo with some CSS:

label {
 border:1px solid #ccc;
 padding:10px;
 margin:0 0 10px;
 display:block; 
}

label:hover {
 background:#eee;
 cursor:pointer;
}

<label><input type="checkbox" />Option 1</label>
<label><input type="checkbox" />Option 2</label>
<label><input type="checkbox" />Option 3</label>

How to create an HTML checkbox with a clickable label and clickable box without the clickable whitespace

Just add a width: 25px; to the container's style. The width should be just large enough to cover every checkbox (see snippet below):

/* Stylesheet *//* The container */
.container {  display: block;  position: relative;  padding-left: 35px;  width: 25px; /* this was added to fix the issue */  margin-bottom: 12px;  cursor: pointer;  font-size: 22px;  -webkit-user-select: none;  -moz-user-select: none;  -ms-user-select: none;  user-select: none;}

/* Hide the browser's default checkbox */
.container input {  position: absolute;  opacity: 0;  cursor: pointer;}

/* Create a custom checkbox */
.checkmark {  position: absolute;  top: 0;  left: 0;  height: 25px;  width: 25px;  background-color: #eee;}

/* On mouse-over, add a grey background color */
.container:hover input~.checkmark {  background-color: #ccc;}

/* When the checkbox is checked, add a blue background */
.container input:checked~.checkmark {  background-color: #2196F3;}

/* Create the checkmark/indicator (hidden when not checked) */
.checkmark:after {  content: "";  position: absolute;  display: none;}

/* Show the checkmark when checked */
.container input:checked~.checkmark:after {  display: block;}

/* Style the checkmark/indicator */
.container .checkmark:after {  left: 9px;  top: 5px;  width: 5px;  height: 10px;  border: solid white;  border-width: 0 3px 3px 0;  -webkit-transform: rotate(45deg);  -ms-transform: rotate(45deg);  transform: rotate(45deg);}

<!DOCTYPE html><html>
<body>
  <h1>Custom Checkboxes</h1>
  <label class="container">One    <input type="checkbox" checked="checked">    <span class="checkmark"></span>  </label>
  <label class="container">Two    <input type="checkbox">    <span class="checkmark"></span>  </label>
  <label class="container">Three    <input type="checkbox">    <span class="checkmark"></span>  </label>
</body>
</html>

How to make checkbox clickable only on checkbox?

Don't use a label, replace it with something else.

Nesting the input in the label automatically associates it with the label.

 <div style="display: flex; align-items: center">
                      <input
                        type="checkbox"
                        style="margin-right: 12px"
                        class=""
                        checked="checked"
                        name="sameadr"
                      />
                      <span class="reach-out"> Reach out to me on</span
                      ><span class="whatsapp-icon"></span>
                      <span class="whatsapp-content"> Whatsapp</span>
                    </div>

Making checkbox and radio labels clickable

No reason other than laziness. <label>s are essential for accessibility, and are also pretty handy for those of us who have poor aim with our mouse clicks :)