Built-in Extensions

This page focuses on the extension capabilities built into the mobile version by default.

Compared with Umo Editor and Umo Editor Next, mobile keeps many same-source extensions to maintain cross-platform consistency, but whether they are fully exposed in the UI still depends on mobile interaction entry points and UI capability boundaries.

Basic Text and Typography

StarterKit
Document
Placeholder
Bold
Subscript
Superscript
Typography
CharacterCount
TextStyleKit
WordWrap
Indent
TextAlign
NodeAlign
LetterSpacing
LineHeight

Lists and Structure

ordered-list
bullet-list
task-list
TaskItem
Details
DetailsContent
DetailsSummary
PageBreak
horizontal-rule
hard-break

Content Blocks and Business Nodes

image
inlineImage
video
audio
file
code-block
math
tag
columns
callout
mention
date-time
option-box
text-box
web-page
footnote
toc

Table
TableRow
TableCell
TableHeader
margin
TableOfContents

Utility Extensions

SearchReplace
Selection
NodeRange
NodeSelect
Dropcursor
OfficePaste
Echarts

Conditionally Enabled Extensions

UniqueID: only enabled when document.enableNodeId is true.

Notes

Built-in extensions can be disabled through disableExtensions.
Custom extensions can be appended through extensions.
Although some extensions are already included, the corresponding mobile UI entry points may differ from desktop or may not yet be fully exposed. Different on Mobile

Key Differences from Desktop

Extension names may be aligned, but their entry points are not necessarily the same. Different on Mobile
Not all desktop productivity extensions provide a complete UI on mobile. Partially Unsupported
Mobile places more emphasis on the combined strategy of “available by default + can be disabled + can be appended”. Mobile-Only

Introduction Custom Extensions