Question

我正在尝试使用::first-letter CSS选择器设置标题样式，但我的布局很奇怪，导致Internet Explorer 11。

代码非常简单：JSFiddle。

h2.titoloPagina::first-letter {
  color: #1d5987;
  display: block;
  float: left;
  font-family: Bell MT !important;
  font-size: 70px;
  /* margin-top: -15px;*/
  padding-right: 3px;
}
h2.titoloPagina span {
  border-bottom: 7px solid #1d5987;
  color: #538cc3;
  font-family: Bell MT !important;
  font-size: 30px !important;
  letter-spacing: 0;
  margin-left: 4px;
  padding-bottom: 5px;
}

/*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */

/**
 * 1. Set default font family to sans-serif (opinionated).
 * 2. Prevent iOS and IE text size adjust after device orientation change,
 *    without disabling user zoom.
 */

html {
  font-family: sans-serif; /* 1 */
  -ms-text-size-adjust: 100%; /* 2 */
  -webkit-text-size-adjust: 100%; /* 2 */
}

/**
 * Remove default margin (opinionated).
 */

body {
  margin: 0;
}

/* HTML5 display definitions
   ========================================================================== */

/**
 * Correct `block` display not defined for any HTML5 element in IE 8/9.
 * Correct `block` display not defined for `details` or `summary` in IE 10/11
 * and Firefox.
 * Correct `block` display not defined for `main` in IE 11.
 */

article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
menu,
nav,
section,
summary {
  display: block;
}

/**
 * 1. Correct `inline-block` display not defined in IE 8/9.
 * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
 */

audio,
canvas,
progress,
video {
  display: inline-block; /* 1 */
  vertical-align: baseline; /* 2 */
}

/**
 * Prevent displaying `audio` without controls in Mobile Safari 4/5/6/7.
 */

audio:not([controls]) {
  display: none;
  height: 0;
}

/**
 * Address `[hidden]` styling not present in IE 8/9/10.
 * Hide the `template` element in IE 8/9/10/11, Safari, and Firefox < 22.
 */

[hidden],
template {
  display: none;
}

/* Links
   ========================================================================== */

/**
 * Remove the gray background color from active links in IE 10.
 */

a {
  background-color: transparent;
}

/**
 * Improve readability of focused elements when they are also in an
 * active/hover state (opinionated).
 */

a:active,
a:hover {
  outline-width: 0;
}

/* Text-level semantics
   ========================================================================== */

/**
 * Address inconsistent styling of `abbr[title]`.
 * 1. Correct styling in Firefox 39 and Opera 12.
 * 2. Correct missing styling in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
  border-bottom: none; /* 1 */
  text-decoration: underline; /* 2 */
  text-decoration: underline dotted; /* 2 */
}

/**
 * Address inconsistent styling of b and strong.
 * 1. Correct duplicate application of `bolder` in Safari 6.0.2.
 * 2. Correct style set to `bold` in Edge 12+, Safari 6.2+, and Chrome 18+.
 */

b,
strong {
  font-weight: inherit; /* 1 */
}

b,
strong {
  font-weight: bolder; /* 2 */
}

/**
 * Address styling not present in Safari and Chrome.
 */

dfn {
  font-style: italic;
}

/**
 * Address variable `h1` font-size and margin within `section` and `article`
 * contexts in Firefox 4+, Safari, and Chrome.
 */

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

/**
 * Address styling not present in IE 8/9.
 */

mark {
  background-color: #ff0;
  color: #000;
}

/**
 * Address inconsistent and variable font size in all browsers.
 */

small {
  font-size: 80%;
}

/**
 * Prevent `sub` and `sup` affecting `line-height` in all browsers.
 */

sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sup {
  top: -0.5em;
}

sub {
  bottom: -0.25em;
}

/* Embedded content
   ========================================================================== */

/**
 * Remove border when inside `a` element in IE 8/9/10.
 */

img {
  border: 0;
}

/**
 * Correct overflow not hidden in IE 9/10/11.
 */

svg:not(:root) {
  overflow: hidden;
}

/* Grouping content
   ========================================================================== */

/**
 * Address margin not present in IE 8/9 and Safari.
 */

figure {
  margin: 1em 40px;
}

/**
 * Address inconsistent styling of `hr`.
 * 1. Correct `box-sizing` set to `border-box` in Firefox.
 * 2. Correct `overflow` set to `hidden` in IE 8/9/10/11 and Edge 12.
 */

hr {
  box-sizing: content-box; /* 1 */
  height: 0; /* 1 */
  overflow: visible; /* 2 */
}

/**
 * Contain overflow in all browsers.
 */

pre {
  overflow: auto;
}

/**
 * 1. Correct inheritance and scaling of font-size for preformatted text.
 * 2. Address odd `em`-unit font size rendering in all browsers.
 */

code,
kbd,
pre,
samp {
  font-family: monospace, monospace; /* 1 */
  font-size: 1em; /* 2 */
}

/* Forms
   ========================================================================== */

/**
 * Known limitation: by default, Chrome and Safari on OS X allow very limited
 * styling of `select`, unless a `border` property is set.
 */

/**
 * 1. Correct font properties not being inherited.
 * 2. Address margins set differently in Firefox 4+, Safari, and Chrome.
 */

button,
input,
optgroup,
select,
textarea {
  font: inherit; /* 1 */
  margin: 0; /* 2 */
}

/**
 * Address `overflow` set to `hidden` in IE 8/9/10/11.
 */

button {
  overflow: visible;
}

/**
 * Address inconsistent `text-transform` inheritance for `button` and `select`.
 * All other form control elements do not inherit `text-transform` values.
 * Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
 * Correct `select` style inheritance in Firefox.
 */

button,
select {
  text-transform: none;
}

/**
 * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
 *    and `video` controls.
 * 2. Correct inability to style clickable `input` types in iOS.
 * 3. Improve usability and consistency of cursor style between image-type
 *    `input` and others.
 */

button,
html input[type="button"], /* 1 */
input[type="reset"],
input[type="submit"] {
  -webkit-appearance: button; /* 2 */
  cursor: pointer; /* 3 */
}

/**
 * Re-set default cursor for disabled elements.
 */

button[disabled],
html input[disabled] {
  cursor: default;
}

/**
 * Remove inner padding and border in Firefox 4+.
 */

button::-moz-focus-inner,
input::-moz-focus-inner {
  border: 0;
  padding: 0;
}

/**
 * Restore focus style in Firefox 4+ (unset by a rule above)
 */

button:-moz-focusring,
input:-moz-focusring {
  outline: 1px dotted ButtonText;
}

/**
 * Address Firefox 4+ setting `line-height` on `input` using `!important` in
 * the UA stylesheet.
 */

input {
  line-height: normal;
}

/**
 * It's recommended that you don't attempt to style these elements.
 * Firefox's implementation doesn't respect box-sizing, padding, or width.
 *
 * 1. Address box sizing set to `content-box` in IE 8/9/10.
 * 2. Remove excess padding in IE 8/9/10.
 */

input[type="checkbox"],
input[type="radio"] {
  box-sizing: border-box; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Fix the cursor style for Chrome's increment/decrement buttons. For certain
 * `font-size` values of the `input`, it causes the cursor style of the
 * decrement button to change from `default` to `text`.
 */

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * Address `appearance` set to `searchfield` in Safari and Chrome.
 */

input[type="search"] {
  -webkit-appearance: textfield;
}

/**
 * Remove inner padding and search cancel button in Safari and Chrome on OS X.
 * Safari (but not Chrome) clips the cancel button when the search input has
 * padding (and `textfield` appearance).
 */

input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * Define consistent border, margin, and padding.
 */

fieldset {
  border: 1px solid #c0c0c0;
  margin: 0 2px;
  padding: 0.35em 0.625em 0.75em;
}

/**
 * 1. Correct `color` not being inherited from fieldset in IE 8/9/10/11.
 * 2. Remove padding so people aren't caught out if they zero out fieldsets.
 */

legend {
  color: inherit; /* 1 */
  padding: 0; /* 2 */
}

/**
 * Remove default vertical scrollbar in IE 8/9/10/11.
 */

textarea {
  overflow: auto;
}

/**
 * Restore font weight (unset by a rule above).
 * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
 */

optgroup {
  font-weight: bold;
}

<h2 class="titoloPagina">
  <span>Title</span>
</h2>

使用Mozilla Firefox，第一个字母与下划线基本对齐，而使用Internet Explorer 11时，它的下限为15px。

我错过了什么？

Answer 1

这是Firefox在this bug report中记录的浮动::first-letter伪元素与其他浏览器的处理之间众所周知的差异。 Firefox是唯一一个在这里正确遵循CSS2.1的浏览器，具有讽刺意味的是，考虑到Firefox是::first-letter 最多中断的浏览器（Chrome紧随其后）。

坏消息是，如果不使用某种浏览器黑客，你无法在其他浏览器中解决这个问题。

（sorta）好消息是，工作组正计划使用initial-letter-align property在CSS Inline Module Level 3中整合此行为，我们只能希望浏览器供应商最终实现它。

Answer 2

此时您的要求并不完全清楚，因为我们无法扣除您希望如何对齐剩余字母以及第一个字母的大小和位置的下划线。

但是这里有两个版本的代码，它们将针对您可能的原始要求。：

h2.titoloPagina { 
    font-family: Bell MT !important;
}
h2.titoloPagina::first-letter {
    float: left;
    font-size: 70px;
    color: #1d5987;
    margin-top: 2.5px;
}
h2.titoloPagina span {
    border-bottom: 7px solid #1d5987;
    font-size: 30px;
    color: #538cc3;
    line-height: 70px;
}

h2.titoloPagina { 
    font-family: Bell MT !important;
}
h2.titoloPagina::first-letter {
    float: left;
    font-size: 70px;
    color: #1d5987;
    padding: 14px;
padding-right: 3px;
}
h2.titoloPagina span {
    border-bottom: 7px solid #1d5987;
    font-size: 30px;
    color: #538cc3;
    line-height: 70px;
    padding-bottom: 12.5px;
}

p.s。：您需要在除Firefox以外的浏览器上测试您的代码，因为您的代码在Chrome上呈现与在Explorer和其他主流浏览器上完全相同，但Mozilla除外。

Answer 3

您必须设置更多属性，例如margin，padding和line-height。通过一些更改，它可以正常工作：

＆＃13;

h2 {
  margin: 0;
  padding: 0.3em 0;
}
h2.titoloPagina::first-letter {
    color: #1d5987;
    display: block;
    float: left;
    font-family: Bell MT !important;
    font-size: 70px;
   /* margin-top: -15px;*/
    padding: 0 3px 0 0;
    margin: 0;
    line-height: 50px;
}
h2.titoloPagina span {
    border-bottom: 7px solid #1d5987;
    color: #538cc3;
    font-family: Bell MT !important;
    font-size: 30px !important;
    letter-spacing: 0;
    margin-left: 4px;
    padding-bottom: 5px;
}

＆＃13;

<h2 class="titoloPagina">
  <span>Title</span>
</h2>

＆＃13;

Answer 4

请使用第一个字母和span的line-height在两个浏览器中使其相同。

所以代码将是：

＆＃13;

h2.titoloPagina::first-letter {
    color: #1d5987;
    display: block;
    float: left;
    font-family: Bell MT !important;
    font-size: 70px;
   /* margin-top: -15px;*/
    padding-right: 3px;
    line-height:50px;
    
}
h2.titoloPagina span {
    border-bottom: 7px solid #1d5987;
    color: #538cc3;
    font-family: Bell MT !important;
    font-size: 30px !important;
    letter-spacing: 0;
    margin-left: 4px;
    padding-bottom: 0px;
    line-height:1px;
}

＆＃13;

<h2 class="titoloPagina">
<span>Title</span>
</h2>

＆＃13;

Answer 5

将line-height设置为h2。最好使用相对字体大小（正文选择器中的基本大小）。

    body {
        font-size: 14px;
    }
    h2.titoloPagina {
        font-size: /*30px*/1.5em !important;
        font-family: Bell MT !important;
        margin-left: 4px;
        padding-bottom: 5px;
        line-height:2em;
    }
    h2.titoloPagina span {
        color: #538cc3;
        letter-spacing: 0;
        border-bottom: .3em solid #1d5987;
    }
    h2.titoloPagina::after {
        content:'';
        display: table;
    }
    h2.titoloPagina::first-letter {
        float: left;
        font-family: Bell MT !important;
        font-size: /*70px*/2.5em;
         margin-top: /*-15px*/.1em;
        padding-right: /*3px*/.01em;
        position:relative;
        border:none;
    }

::第一个字母选择器 - 与Firefox相比，IE11具有不同的布局

5 个答案: