Revert "hterm/nassh: Add basic support for announcing command output to AT in hterm."

This reverts commit cbc223d74723cd376a3ca28bd1fd2d9907017093.

Reason for revert: It broke the crosh app, probably because 505FEAE9DD5B27637DCF72045ECA2D5D7F66D2FD wasn't whitelisted in this CL:

Will revert until that's fixed.

Original change's description:
> hterm/nassh: Add basic support for announcing command output to AT in hterm.
> This adds basic support for announcing command output for Assistive
> Technology. A live region is created and <p> elements added to it to
> indicate that the screen reader should announce the output. The live
> region is separate from the <x-screen> element is used because not all
> output will be rendered to the <x-screen>. It also allows the output to
> be structured in a way that is more suitable for AT.
> For large amounts of output, delays are inserted before rendering text
> to the live region to avoid performance issues which cause the DOM to
> hang.
> nassh and crosh are updated to use this support only when a screen
> reader is detected to be present. When that's not the case we don't
> add nodes to the live region since there is an associated performance
> cost.
> Change-Id: I9ab09a4bc869038d22d907097e8d80d57d904710
> Bug: 822490, 646690
> Reviewed-on:
> Reviewed-by: David Tseng <>
> Reviewed-by: Mike Frysinger <>
> Tested-by: Raymes Khoury <>,,

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 822490, 646690
Change-Id: If2fa1c9b0289e0b2de75e27ff21eed2405de9f28
Reviewed-by: Raymes Khoury <>
Tested-by: Raymes Khoury <>
13 files changed
tree: cc9cfa3057ed844f680a08210ea62be16ba58b64
  1. .clang-format
  2. .eslintrc.js
  3. .gitignore
  7. hterm/
  8. libdot/
  9. nassh/
  11. package.json
  12. saltpig/
  13. ssh_client/
  14. wam/
  15. wash/


This repository contains the libdot JavaScript library and some web applications that make use of it.

The official copy of this repository is hosted at

There is also a mirror on github at A few subprojects are also extracted out into their own git repo and mirrored. Keep in mind that these mirrors may occasionally be behind the official repository.

All changes must go through the Gerrit code review server on Github pull requests cannot be accepted. Please see the document in this directory for the details.

Top level directories

  • libdot/ is a small set of JS libraries initially developed as part of hterm, now available as shared code.

  • hterm/ is a JS library that provides a terminal emulator. It is reasonably fast, reasonably correct, and reasonably portable across browsers.

  • nassh/ is the Secure Shell Chrome App (currently a “v1.5” app, soon to become a “v2” or platform app) that combines hterm with a NaCl build of OpenSSH to provide a PuTTY-like app for Chrome users.

  • ssh_client/ is the NaCl port of OpenSSH. It is used by nassh to create the Secure Shell App.

  • wash/ is a library for cross-origin virtual filesystems, similar to the Plan 9 filesystem. This directory also contains a simple bash-like shell environment for exploring these filesystems. The code in this directory is a work-in-progress.