angular/components

Typing in Autosize textarea on Firefox mobile causes unexpected characters to appear

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#18,393 opened on Feb 5, 2020

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GP3area: material/inputhelp wanted

Description

Reproduction

Steps to reproduce:

  1. Install Firefox mobile (https://play.google.com/store/apps/details?id=org.mozilla.firefox, versionName=68.4.2, versionCode=2015676155)
  2. Navigate to https://material.angular.io/components/input/examples (currently version 8.2.3)
  3. Scroll down to the the 'Auto-resizing textarea' section
  4. Tap in the 'Autosize textarea' box
  5. Type a few characters

Expected Behavior

Characters appear exactly as typed

Actual Behavior

  • Extraneous characters appear.
  • Looks like the Firefox mobile browser and Angular Material are fighting each other, causing extra characters to appear

Environment

Contributor guide

Tech stack
angulartypescripthtmlcss
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic Angular knowledgeAccess to Firefox mobile or emulator
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the autosize textarea directive in Angular Material (likely in cdk/text field or material/input). Reproduce the bug on Firefox mobile to observe the extra character behavior. Look at the input event handling in the autosize directive and check for any composition events or browser specific workarounds. The issue is from Angular 8, so verify if it persists in the latest version. If not, the fix may already be applied.
Typing in Autosize textarea on Firefox mobile causes unexpected characters to appear · angular/components#18393 | Good First Issue