www/docs/forms/layout.mdx
import FormGroup from '!!raw-loader!../examples/Form/FormGroup'; import FormLabelSizing from '!!raw-loader!../examples/Form/FormLabelSizing'; import GridAutoSizing from '!!raw-loader!../examples/Form/GridAutoSizing'; import GridAutoSizingColMix from '!!raw-loader!../examples/Form/GridAutoSizingColMix'; import GridBasic from '!!raw-loader!../examples/Form/GridBasic'; import GridColSizes from '!!raw-loader!../examples/Form/GridColSizes'; import GridComplex from '!!raw-loader!../examples/Form/GridComplex'; import Horizontal from '!!raw-loader!../examples/Form/Horizontal';
Every group of form fields should reside in a <Form> element. Bootstrap
provides no default styling for the <Form> element, but there are some
powerful browser features that are provided by default.
<button>s within a <Form> default to type="submit", so strive to be
specific and always include a type.<fieldset> and setting the disabled attribute on it.Since Bootstrap applies display: block and width: 100% to almost all our
form controls, forms will by default stack vertically. Additional classes can
be used to vary this layout on a per-form basis.
The FormGroup component is the easiest way to add some structure to forms.
It provides a flexible container for grouping of labels, controls, optional
help text, and form validation messaging. Use it with fieldsets, divs,
or nearly any other element.
You also add the controlId prop to accessibly wire the nested label and
input together via the id.
More complex forms can be built using the grid components. Use these for form layouts that require multiple columns, varied widths, and additional alignment options.
<CodeBlock language="jsx" live> {GridBasic} </CodeBlock>More complex layouts can also be created with the grid system.
<CodeBlock language="jsx" live> {GridComplex} </CodeBlock>Create horizontal forms with the grid by adding as={Row} to form groups and
using Col to specify the width of your labels and controls. Be sure to add
the column prop to your FormLabels as well so they’re vertically centered
with their associated form controls.
At times, you maybe need to use margin or padding utilities to create that
perfect alignment you need. For example, we’ve removed the padding-top on our
stacked radio inputs label to better align the text baseline.
You can size the <FormLabel> using the column prop as shown.
As shown in the previous examples, our grid system allows you to place any number
of <Col>s within a <Row>. They'll split the available width equally between
them. You may also pick a subset of your columns to take up more or less space,
while the remaining <Col>s equally split the rest, with specific column classes
like <Col xs={7}>.
The example below uses a flexbox utility to vertically center the contents and
changes <Col> to <Col xs="auto"> so that your columns only take up as much
space as needed. Put another way, the column sizes itself based on the contents.
You can then remix that once again with size-specific column classes.
<CodeBlock language="jsx" live> {GridAutoSizingColMix} </CodeBlock>