The Modifier module is a static set of utility functions that encapsulate common edit operations on ContentState objects. It is highly recommended that you use these methods for edit operations.

These methods also take care of removing or modifying entity ranges appropriately, given the mutability types of any affected entities.

In each case, these methods accept ContentState objects with relevant parameters and return ContentState objects. The returned ContentState will be the same as the input object if no edit was actually performed.

Methods

• replaceText(...): ContentState

• insertText(...): ContentState

• moveText(...): ContentState

• replaceWithFragment(...): ContentState

• removeRange(...): ContentState

• splitBlock(...): ContentState

• applyInlineStyle(...): ContentState

• removeInlineStyle(...): ContentState

• setBlockType(...): ContentState

• setBlockData(...): ContentState

• mergeBlockData(...): ContentState

• applyEntity(...): ContentState

replaceText(
  contentState: ContentState,
  rangeToReplace: SelectionState,
  text: string,
  inlineStyle?: DraftInlineStyle,
  entityKey?: ?string
): ContentState

Replaces the specified range of this ContentState with the supplied string, with the inline style and entity key applied to the entire inserted string.

Example: On Facebook, when replacing @abraham lincoln with a mention of Abraham Lincoln, the entire old range is the target to replace and the mention entity should be applied to the inserted string.

insertText(
  contentState: ContentState,
  targetRange: SelectionState,
  text: string,
  inlineStyle?: DraftInlineStyle,
  entityKey?: ?string
): ContentState

Identical to replaceText, but enforces that the target range is collapsed so that no characters are replaced. This is just for convenience, since text edits are so often insertions rather than replacements.

moveText(
  contentState: ContentState,
  removalRange: SelectionState,
  targetRange: SelectionState
): ContentState

Moves the "removal" range to the "target" range, replacing the target text.

replaceWithFragment(
  contentState: ContentState,
  targetRange: SelectionState,
  fragment: BlockMap
): ContentState

A "fragment" is a section of a block map, effectively just an OrderedMap<string, ContentBlock> much the same as the full block map of a ContentState object.

This method will replace the "target" range with the fragment.

Example: When pasting content, we convert the paste into a fragment to be inserted into the editor, then use this method to add it.

removeRange(
  contentState: ContentState,
  rangeToRemove: SelectionState,
  removalDirection: DraftRemovalDirection
): ContentState

Remove an entire range of text from the editor. The removal direction is important for proper entity deletion behavior.

splitBlock(
  contentState: ContentState,
  selectionState: SelectionState
): ContentState

Split the selected block into two blocks. This should only be used if the selection is collapsed.

applyInlineStyle(
  contentState: ContentState,
  selectionState: SelectionState,
  inlineStyle: string
): ContentState

Apply the specified inline style to the entire selected range.

removeInlineStyle(
  contentState: ContentState,
  selectionState: SelectionState,
  inlineStyle: string
): ContentState

Remove the specified inline style from the entire selected range.

setBlockType(
  contentState: ContentState,
  selectionState: SelectionState,
  blockType: DraftBlockType
): ContentState

Set the block type for all selected blocks.

setBlockData(
  contentState: ContentState,
  selectionState: SelectionState,
  blockData: Map<any, any>
): ContentState

Set the block data for all selected blocks.

mergeBlockData(
  contentState: ContentState,
  selectionState: SelectionState,
  blockData: Map<any, any>
): ContentState

Update block data for all selected blocks.

applyEntity(
  contentState: ContentState,
  selectionState: SelectionState,
  entityKey: ?string
): ContentState

Apply an entity to the entire selected range, or remove all entities from the range if entityKey is null.