File Selector - Lightning Design System

The File selector component allows the user to select file(s) from a user’s file system. Either natively using an file input or drag and drop.

Base

When implementing this component, pay special attention to the following:

Notable attributes

aria-labelledby is placed on the HTML input to form an "Accessible Label" from 2 seperate visible text labels, by referencing their id attributes

Selector: The CSS class being referred to.
Summary: A description of what the class does.
Support: Whether the class name is dev-ready (meaning it's fully vetted and tested and safe to use) or prototype (which means it's not fully vetted yet).
Restrict: The selector that the class name is allowed to be used on.
Variant: The base level pattern for a component. A variant can be extended to create another variant of that component, for example, a stateful button is a derivative of the base button.
Modifier: A single class that can be added to an HTML element of a component to modify its output. Typically these will be colors, sizing and positioning.

Selector	`.slds-file-selector__dropzone`
Summary	Region that a file can be dropped within
Restrict	`.slds-file-selector div`

Selector	`.slds-file-selector__button`
Summary	Faux button
Restrict	`.slds-file-selector button, .slds-file-selector span`

Selector	`.slds-file-selector_files`
Summary	Modifications based on context Single Line Dedicated dropzone when there are multiple dropzones in the form or when the input is positioned among other form inputs.
Restrict	`.slds-file-selector`

Selector	`.slds-file-selector__body`
Summary	Container for file selector content, specifically within the dropzone
Restrict	`.slds-file-selector label`

Selector	`.slds-file-selector_images`
Summary	Multi Line / Image Use as a dedicated dropzone for image files only. May require a cropping control.
Restrict	`.slds-file-selector`
Variant	True

Selector	`.slds-file-selector_integrated`
Summary	Invisible Dropzone (Container) Use when an entire container should be droppable. The container should have a visible boundary, like a modal, composer, or page.
Restrict	`.slds-file-selector`
Variant	True

Selector	`.slds-file-selector__dropzone_integrated`
Summary	Specific to integrated file selector — region that a file can be dropped within
Restrict	`.slds-file-selector_integrated div`

Selector	`.slds-has-drag`
Summary	Informs dropzone that file has been dragged into the viewport
Restrict	`.slds-file-selector__dropzone_integrated`
Modifier	True

Selector	`.slds-has-drag-over`
Summary	Informs dropzone that file has been dragged into its region
Restrict	`.slds-file-selector__dropzone_integrated`
Modifier	True

Selector	`.slds-file-selector__body_integrated`
Summary	Specific to integrated file selector — container for file selector content, specifically within the dropzone
Restrict	`.slds-file-selector_integrated label`

Selector	`.slds-file-selector__text_integrated`
Summary	Specific to integrated file selector — Descriptive call back text
Restrict	`.slds-file-selector_integrated span`