区别：1、Bootstrap3支持移动端优先，Bootstrap没有；2、Bootstrap2采用渐变凹凸风格，Bootstrap3采用扁平化设计风格；3、bootstrap3的浏览器兼容性方面比Bootstrap2好。
相关教程推荐：《bootstrap教程》
做项目时，有时也会参考别的案例的优秀之处。在用Bootstrap的时候，发现很多项目代码都有区别，在<div>布局class上，有用.span*，有用.col-md-*，实际上是Bootstrap版本升级，语法也变了。
Bootstrap3中被修改的样式
| Bootstrap 2.x | Bootstrap 3.x |
|---|---|
.container-fluid |
.container |
.row-fluid |
.row |
.span* |
.col-md-* |
.offset* |
.col-md-offset-* |
.brand |
.navbar-brand |
.nav-collapse |
.navbar-collapse |
.nav-toggle |
.navbar-toggle |
.btn-navbar |
.navbar-btn |
.hero-unit |
.jumbotron |
.icon-* |
.glyphicon .glyphicon-* |
.btn |
.btn .btn-default |
.btn-mini |
.btn-xs |
.btn-small |
.btn-sm |
.btn-large |
.btn-lg |
.alert-error |
.alert-danger |
.visible-phone |
.visible-xs |
.visible-tablet |
.visible-sm |
.visible-desktop |
分成了 .visible-md .visible-lg
|
.hidden-phone |
.hidden-xs |
.hidden-tablet |
.hidden-sm |
.hidden-desktop |
分成了 .hidden-md .hidden-lg
|
.input-small |
.input-sm |
.input-large |
.input-lg |
.control-group |
.form-group |
.checkbox.inline .radio.inline
|
.checkbox-inline .radio-inline
|
.input-prepend .input-append
|
.input-group |
.add-on |
.input-group-addon |
.img-polaroid |
.img-thumbnail |
ul.unstyled |
.list-unstyled |
ul.inline |
.list-inline |
.muted |
.text-muted |
.label |
.label .label-default |
.label-important |
.label-danger |
.text-error |
.text-danger |
.table .error |
.table .danger |
.bar |
.progress-bar |
.bar-* |
.progress-bar-* |
.accordion |
.panel-group |
.accordion-group |
.panel .panel-default |
.accordion-heading |
.panel-heading |
.accordion-body |
.panel-collapse |
.accordion-inner |
.panel-body |
Bootstrap3.x中新增的样式
| 页面元素 | 描述 |
|---|---|
| Panels |
.panel .panel-default .panel-body .panel-title .panel-heading.panel-footer.panel-collapse
|
| List groups |
.list-group .list-group-item .list-group-item-text.list-group-item-heading
|
| Glyphicons | .glyphicon |
| Jumbotron | .jumbotron |
| Extra small grid (<768px) | .col-xs-* |
| Small grid (≥768px) | .col-sm-* |
| Medium grid (≥992px) | .col-md-* |
| Large grid (≥1200px) | .col-lg-* |
| Responsive utility classes (≥1200px) |
.visible-lg .hidden-lg
|
| Offsets |
.col-sm-offset-* .col-md-offset-* .col-lg-offset-*
|
| Push |
.col-sm-push-* .col-md-push-* .col-lg-push-*
|
| Pull |
.col-sm-pull-* .col-md-pull-* .col-lg-pull-*
|
| Input groups |
.input-group .input-group-addon .input-group-btn
|
| Form controls |
.form-control .form-group
|
| Button group sizes |
.btn-group-xs .btn-group-sm .btn-group-lg
|
| Navbar text | .navbar-text |
| Navbar header | .navbar-header |
| Justified tabs / pills | .nav-justified |
| Responsive images | .img-responsive |
| Contextual table rows |
.success .danger .warning .active
|
| Contextual panels |
.panel-success .panel-danger .panel-warning .panel-info
|
| Modal |
.modal-dialog .modal-content
|
| Thumbnail image | .img-thumbnail |
| Well sizes |
.well-sm .well-lg
|
| Alert links | .alert-link |
Bootstrap3.x中被移除的样式
| 页面元素 | 从2.x版本中去除 | 3.x版本中对应的元素 |
|---|---|---|
| Form actions | .form-actions |
N/A |
| Search form | .form-search |
N/A |
| Form group with info | .control-group.info |
N/A |
| Fluid container | .container-fluid |
.container (不再进行固定) |
| Fluid row | .row-fluid |
.row (不再进行固定) |
| Controls wrapper | .controls |
N/A |
| Controls row | .controls-row |
.row 或者.form-group
|
| Navbar inner | .navbar-inner |
N/A |
| Navbar vertical dividers | .navbar .divider-vertical |
N/A |
| Dropdown submenu | .dropdown-submenu |
N/A |
| Tab alignments |
.tabs-left .tabs-right.tabs-below
|
N/A |
| Nav lists |
.nav-list .nav-header
|
没有直接对等的样式t, 但是和List groups 和 .panel-groups相似 |
且
自Bootstrap3起，框架包含了贯穿于整个库的移动设备优先的样式。
Bootstrap2采用渐变凹凸风格，Bootstrap3采用扁平化设计风格
-
bootstrap3的浏览器兼容性方面比Bootstrap2好
如果你需要兼容IE8甚至是IE7和IE6，那么只能选择Bootstrap2，虽然它自身在IE6的效果也并不完美。
