Why does my Bootstrap input not align right? - html

Question

Why does my Bootstrap input not align right (=> see 3rd input with placeholder='Does not align right')?
The td table element has a style which defines the alignment...
When I remove the style element from the td element at set the input style text-align=right, it is still left aligned.
<div class="row">
<div class="col-md-6">
<div class="well" style="width:840px">
<table class='table borderless' style="width:800px">
<tr>
<td colspan="2">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input1" placeholder="Input 1">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input2" placeholder="Input 2">
</td>
</tr>
<tr>
<td colspan="2" style="text-align: right">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input3" placeholder="Does not align right">
</td>
</tr>
<tr>
</table>
</div>
</div>
</div>

Answer 1

Why does my Bootstrap input not align right?
Because .form-control will have display: block from bootstrap.min.css. As proof of this, if you make it an inline-block again it'll work:
.form-control { display: inline-block !important; }
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div class="row">
<div class="col-md-6">
<div class="well" style="width:840px">
<table class='table borderless' style="width:800px">
<tr>
<td colspan="2">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input1" placeholder="Input 1">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input2" placeholder="Input 2">
</td>
</tr>
<tr>
<td colspan="2" style="text-align: right">
<input class="form-control input-sm" style="width:300px;margin-bottom:0px" type="text" name="input3" placeholder="Does not align right">
</td>
</tr>
<tr>
</table>
</div>
</div>
</div>
What you probably really want is your controls to behave like that straight away. To do so make sure to utilize Bootstrap's form-inline, e.g. like this:
<div class="row form-inline">
Note that this affects the first row of inputs too. If you move the form-inline to a another spot you could choose to prevent that from happening.

Answer 2

That's because your input has it's display property set to block via the .form-control class. Block level elements will take up the whole width of their containing element. Even if a width is set, the remaining space is taken up by margin.
To get the input to align the way you would like change the display value to inline-block or add the class .pull-right to the input.
.form-control {
display: inline-block;
}
<input type="text" class="form-control input-sm pull-right">

Answer 3

Twitter Bootstrap specially set width: 100% property to the .form-control to make the life easier and handle such things with Grid system
You can go with the following solution
HTML Markup
<div class="row">
<div class="col-md-9 is-centered">
<div class="well well-form">
<!-- Two inline input fields per row -->
<div class="row">
<div class="col-sm-6 form-group">
<input class="form-control input-sm" type="text" name="input1" placeholder="Input 1">
</div>
<div class="col-sm-6 form-group">
<input class="form-control input-sm" type="text" name="input2" placeholder="Input 2">
</div>
</div>
<div class="row has-border">
<div class="col-sm-12">
<!-- Single input fields per row (pushed to the right) -->
<div class="row">
<div class="col-sm-6 pull-right">
<input class="form-control input-sm" type="text" name="input3" placeholder="align to right">
</div>
</div>
</div>
</div>
</div>
</div>
</div>
Helpers (optional)
SCSS
[class*="col-"] {
&.is-centered {
float: none;
margin-right: auto;
margin-left: auto;
}
}
.well-form {
> .row {
padding-top: 8px;
border-top: 1px solid #ddd;
}
.form-group {
margin-bottom: 8px;
}
}
CSS
[class*="col-"].is-centered {
float: none;
margin-right: auto;
margin-left: auto;
}
.well-form > .row {
padding-top: 8px;
border-top: 1px solid #ddd;
}
.well-form .form-group {
margin-bottom: 8px;
}
DEMO
Couple of things to notice:
<table> is not a good approach in this case
inline style=" to HTML tags is not good at all (even if its a demo)
Hope this helps