Generates CSS class string for responsive grid layout based on field column configuration.

Creates Bootstrap-style column classes for implementing responsive form layouts. Validates column values to ensure they fall within the standard 12-column grid system.

Presentation

function getGridClassString(fieldDef: FieldDef<unknown>): string;

Returns

string -

CSS class string for grid layout, empty if no valid column configuration

Parameters

Name	Type	Description
fieldDef	`FieldDef<unknown>`	Field definition containing column configuration

Example usage

// Full width field
const fullWidth = getGridClassString({ type: 'input', key: 'name', col: 12 });
// Returns: 'df-col-12'

// Half width field
const halfWidth = getGridClassString({ type: 'input', key: 'email', col: 6 });
// Returns: 'df-col-6'

// Invalid column value
const invalid = getGridClassString({ type: 'input', key: 'phone', col: 15 });
// Returns: ''