How to add asterisks to required form options using CSS

When making a web form, if an option is required, an asterisk is usually added to the option. Below, I will share with you how to use CSS to add an asterisk to the required form option. Friends who need it can refer to it. Bar

When making a web form, if an option is required, an asterisk is usually added to the option, such as Typecho’s comment form:

<p class="form-group">
    <label for="author">姓名</label> <span class="required">*</span>
    <input type="text" id="author" name="author" required="required" size="30" class="form-text">
</p>

Example:

* Name

Then add a little CSS style to the asterisk:

.form-group span.required {
    color: #999;
    font-size: 150%;
}

For example:

But sometimes we may not be able to modify the HTML structure, or we may not want to add extra meaningless tags. In this case, we can use the CSS after pseudo-class to create a star. Number.

Still with the form above, delete the code <span class="required">*</span>, and then add CSS:

.form-group label:after {
    content: ' *';
    color: #999;
    font-size: 150%;
}

In this way, you can use CSS to create an asterisk that represents a must-select.

In fact, the before and after pseudo-classes of CSS are very easy to use. Most people just use them to clear floats. In fact, if you use your imagination and make good use of these two pseudo-classes, you can do amazing things.

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