eclipse-theia/theia

unexpected refresh of a webview

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#8,251 opened on Jul 28, 2020

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bughelp wantedwebviews

Description

Bug Description:

A webview is been refreshed when it is maximized or minimized

Steps to Reproduce:

  1. download and run https://github.com/microsoft/vscode-extension-samples/tree/master/webview-sample
  2. when you maximize or minimize the running webivew you see that the content of a webview is disappears for a few seconds, actually it is being refreshed and it does not stop in any break point even if you put them in a vscode webvew life cycle methods.

Additional Information

@theia/core 1.3.0

Contributor guide

Tech stack
typescripthtmlcss
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.
1-3 hours
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.
needs investigation
Prerequisites
Familiarity with Theia webview API
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the webview lifecycle in Theia, focusing on the behavior when the window is maximized or minimized. Check the source files related to webview handling in the @theia/core package, and reproduce the issue using the provided sample. Look for any event listeners that might cause an unintended refresh, and consider if there are differences compared to VS Code's webview implementation.