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How can I get my Twitter Bootstrap buttons to right align?

Insert pull-right into the class attribute and let bootstrap arrange the buttons. For Bootstrap 2.3, see: http://getbootstrap.com/2.3.2/components.html#misc > Helper classes > .pull-right. For Bootstrap 3, see: https://getbootstrap.com/docs/3.3/css/#helper-classes > Helper classes. For Bootstrap 4, see: https://getbootstrap.com/docs/4.0/utilities/float/#responsive The pull-right command was removed and replaced with float-right or in general to float-{sm,md,lg,xl}-{left,right,none}

Bootstrap combining rows (rowspan)

Divs stack vertically by default, so there is no need for special handling of “rows” within a column. Expand snippet Output: Here’s the fiddle.

What is the difference between Bootstrap .container and .container-fluid classes?

Quick version: .container has one fixed width for each screen size in bootstrap (xs,sm,md,lg); .container-fluid expands to fill the available width. The difference between container and container-fluid comes from these lines of CSS: Depending on the width of the viewport that the webpage is being viewed on, the container class gives its div a specific fixed width. These lines don’t exist in any form for container-fluid, … Read more

What are these attributes: `aria-labelledby` and `aria-hidden`

HTML5 ARIA attribute is what you’re looking for. It can be used in your code even without bootstrap. Accessible Rich Internet Applications (ARIA) defines ways to make Web content and Web applications (especially those developed with Ajax and JavaScript) more accessible to people with disabilities. To be precise for your question, here is what your attributes are … Read more

What is a “meta component” in the context of bootstrap or as a general web design term?

meta component is a component that consists some other components , for example bootstrap navbar consists navbar container , navbar header and navbar collapse. In other words meta components is a collection of other components and have no special feature for themselves in most cases. see the following link it may help. https://bootstrapious.com/p/bootstrap-navbar

bootstrap 3 tabs not working properly

According to the Docs you need to put an id on each link in the header and that link needs to be inside the li which should have no other styles, i.e doesn’t need all the data-target stuff in the li. Your list has with no data-toggle or id. Your HTML would be like this And you shouldn’t need any Javascript, according to the Docs

What does an “&” before a pseudo element in CSS mean?

That’s LESS, not CSS. This syntax allows you to nest selector modifiers. Will compile to: With the &, the nested selectors compile to .clearfix:before.Without it, they compile to .clearfix :before.