本文转自：http://stackoverflow.com/questions/18838964/add-bootstrap-glyphicon-to-input-box
How can I add a glyphicon to a text type input box? For example I want to have 'icon-user' in a username input, something like this:
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Without Bootstrap:We'll get to Bootstrap in a second, but here's the fundamental CSS concepts in play in order to do this yourself. As beard of prey points out, you can do this with CSS by absolutely positioning the icon inside of the input element. Then add padding to either side so the text doesn't overlap with the icon. So for the following HTML: You can use the following CSS to left and right align glyphs: Demo in Plunker
With Bootstrap:As buffer points out, this can be accomplished natively within Bootstrap by using Validation States with Optional Icons. This is done by giving the The simplest example would be something like this: Pros:
Cons:
To overcome the cons, I put together this pull-request with changes to support left aligned icons. As it is a relatively large change, it has been put off until a future release, but if you need these features today, here's a simple implementation guide: If you're using less, just include these changes in your project. If you're not using less, grab the file and convert it to CSS with any online LESS Compiler. Then, all you have to do is include the class Since there are a lot of possible html configurations over different form types, different control sizes, different icon sets, and different label visibilities, I created a test page that shows the correct set of HTML for each permutation along with a live demo. Here's a demo in Plunker
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