bootstrap基本css样式按钮

1.样式预定义<!-- Standard button --><button type="button" class="btn btn-default">Default</button><!-- Provides extra visual weight and identifies the primary action in a set of buttons --><button type="button" class="btn btn-primary">Primary</button><!-- Indicates a successful or positive action --><button type="button" class="btn btn-success">Success</button><!-- Contextual button for informational alert messages --><button type="button" class="btn btn-info">Info</button><!-- Indicates caution should be taken with this action --><button type="button" class="btn btn-warning">Warning</button><!-- Indicates a dangerous or potentially negative action --><button type="button" class="btn btn-danger">Danger</button><!-- Deemphasize a button by making it look like a link while maintaining button behavior --><button type="button" class="btn btn-link">Link</button>2.按钮尺寸<p>  <button type="button" class="btn btn-primary btn-lg">Large button</button>  <button type="button" class="btn btn-default btn-lg">Large button</button></p><p>  <button type="button" class="btn btn-primary">Default button</button>  <button type="button" class="btn btn-default">Default button</button></p><p>  <button type="button" class="btn btn-primary btn-sm">Small button</button>  <button type="button" class="btn btn-default btn-sm">Small button</button></p><p>  <button type="button" class="btn btn-primary btn-xs">Extra small button</button>  <button type="button" class="btn btn-default btn-xs">Extra small button</button></p>3.激活状态<button type="button" class="btn btn-primary btn-lg active">Primary button</button><button type="button" class="btn btn-default btn-lg active">Button</button><a href="#" class="btn btn-primary btn-lg active" role="button">Primary link</a><a href="#" class="btn btn-default btn-lg active" role="button">Link</a>4.禁用状态<button type="button" class="btn btn-lg btn-primary" disabled="disabled">Primary button</button><button type="button" class="btn btn-default btn-lg" disabled="disabled">Button</button><a href="#" class="btn btn-primary btn-lg disabled" role="button">Primary link</a><a href="#" class="btn btn-default btn-lg disabled" role="button">Link</a>5.按钮分类<a class="btn btn-default" href="#" role="button">Link</a><button class="btn btn-default" type="submit">Button</button><input class="btn btn-default" type="button" value="Input"><input class="btn btn-default" type="submit" value="Submit">