CSS中的一个输入占位符是否可以有2种不同的字体大小?
像这样的设计:在普通的html中,你可以使用span,:before,&:after等等。
但在输入中你不能做所有这些事情所以我想了解它是否可能......
感谢
答案 0 :(得分:5)
要在同一占位符中应用不同的样式是不可能的。
然而,您可以使用伪元素或表现为占位符的div,并在输入聚焦时隐藏/显示它。
这可能会有所帮助:
$("#input").keyup(function() {
if ($(this).val().length) {
$(this).next('.placeholder').hide();
} else {
$(this).next('.placeholder').show();
}
});
$(".placeholder").click(function() {
$(this).prev().focus();
});

.placeholder {
position: absolute;
margin: 7px 8px;
color: #A3A3A3;
cursor: auto;
font-size: 14px;
top: 7px;
}
.small {
font-size: 10px;
}
input {
padding: 5px;
font-size: 11pt;
position: relative;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="input" type="text" />
<div class="placeholder">Email <span class="small">address</span>
</div>
&#13;
答案 1 :(得分:1)
CSS 仅限解决方案
var companyField = $("input[name$='field_company']");
for (var i;i<companyField.length;i++) {
var companyValue = companyField[i].val();
company.push(companyValue);
}
var fromField = $("input[name$='field_from']");
for (var i;i<fromField.length;i++) {
var fieldValue = fromField[i].val();
from.push(fieldValue);
}
var toField = $("input[name$='field_to']");
for (var i;i<toField.length;i++) {
var toValue = toField[i].val();
to.push(toValue);
}
var yearField = $("input[name$='field_year']");
for (var i;i<yearField.length;i++) {
var yearValue = yearField[i].val();
year.push(yearValue);
}
.input-field {
position: relative;
display: inline-block;
}
.input-field > label {
position: absolute;
left: 0.5em;
top: 50%;
margin-top: -0.5em;
opacity: 1;
display: none;
}
.input-field > input[type=text]:placeholder-shown + label {
display: block;
}
.input-field > label > span {
letter-spacing: -2px;
}
.first-letter {
color: red;
font-size:100%;
}
.second-letter {
color: blue;
font-size:50%;
}
.third-letter {
color: orange;
font-size:75%;
}
.fourth-letter {
color: green;
font-size:100%;
}
.fifth-letter {
color: yellow;
font-size:25%;
}
JS 解决方案
<div class="input-field">
<input id="input-text-field" type="text" placeholder=" "></input>
<label for="input-text-field">
<span class="first-letter">H</span>
<span class="second-letter">E</span>
<span class="third-letter">L</span>
<span class="fourth-letter">L</span>
<span class="fifth-letter">O</span>
</label>
</div>
addListenerMulti(document.getElementById('input-text-field'), 'focus keyup', blurme);
function blurme(e) {
var element = e.currentTarget;
element.classList[(element.value.length !== 0) ? "add" : "remove"]('hide-placeholder');
}
function addListenerMulti(el, s, fn) {
s.split(" ").forEach(function(e) {
return el.addEventListener(e, fn, false)
});
}
.input-field {
position: relative;
display: inline-block;
}
.input-field > label {
position: absolute;
left: 0.5em;
top: 50%;
margin-top: -0.5em;
}
.hide-placeholder + label {
display: none;
}
.input-field > label > span {
letter-spacing: -2px;
}
.first-letter {
color: red;
font-size:100%;
}
.second-letter {
color: blue;
font-size:100%;
}
.third-letter {
color: orange;
font-size:100%;
}
.fourth-letter {
color: green;
font-size:50%;
}
.fifth-letter {
color: black;
font-size:50%;
}