Apply multiple styles to a single placeholder in an input element

问题

I've got a basic input element on a form:

<input type="text" name="where" placeholder="Location or Place">

But I want to style the placeholder inline with the design below:

Currently I've got the following styles:

::-webkit-input-placeholder, ::-moz-placeholder, :-ms-input-placeholder, input:-moz-placeholder {
    color: white;
}

Obviously this doesn't handle the light blue 'or' text. I'd love to do this with CSS3 where possible. It it possible to style this using just CSS?

回答1:

The only solution i see is to avoid the use of placeholder and replace its behaviour with javascript. The old-style way!

See this demo

HTML

<div class="location">
    <span class="holder">Location <span class="blue">or</span> Place</span>
  <input id="input" size="18" type="text" />&nbsp;
</div>

Javascript

$(function() {
    $("span.holder + input").keyup(function() {
        if($(this).val().length) {
            $(this).prev('span.holder').hide();
        } else {
            $(this).prev('span.holder').show();
        }
    });
    $("span.holder").click(function() {
        $(this).next().focus();
    });
});

CSS

div.location > span.holder {
position: absolute;
margin: 5px 8px;
color: #ddd;
cursor: auto;
font-family: Helvetica;
font-size: 11pt;
z-index: 1;
}

div.location > span.holder > span.blue{
    color: #819FF7;
}

div input {
    padding:5px;
    font-size:11pt;
    background-color: #0B7DAB;
    color: white;
     border-radius:15px;
     -moz-border-radius:15px;
     -webkit-border-radius:15px;
    border: none;
}

回答2:

If anyone is wondering if it is possible in 2016, but it can be achieved using only css, with :valid selector:

HTML:

<div class="holder">
<input type="text" placeholder="" required="required">
<span class="placeholder">Name <span>*</span></span>
</div>

CSS:

.holder {
  position: relative;
}

input[required="required"]:valid + .placeholder {
  display: none;
}

.placeholder {
  position: absolute;
  top: 2px;
  left: 2px;
  color: green;

}

.placeholder span {
  color: red;
}

demo fiddle

来源：https://stackoverflow.com/questions/23007819/apply-multiple-styles-to-a-single-placeholder-in-an-input-element

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