When unfocusing webview with retainContextWhenHidden true, webview still get reconstructed #44681

octref · 2018-02-27T23:43:15Z

I would assume the webview's html content is preserved when it's unfocused. So if I switch away from webview 1 and come back to it, I should see the counter continue going up (instead of starting again from 0).
This does not seem to be the case.

import * as vscode from 'vscode';
import * as path from 'path';
import * as fs from 'fs';

export function activate(context: vscode.ExtensionContext) {
  const htmlPath = path.resolve(context.extensionPath, 'media/index.html');

  vscode.commands.registerCommand('extension.sayHello', () => {
    const wv = vscode.window.createWebview(vscode.Uri.parse(`foo:${new Date().toTimeString()}`), vscode.ViewColumn.One, {
      enableScripts: true,
      retainContextWhenHidden: true
    });
    wv.html = fs.readFileSync(htmlPath, 'utf-8');
    wv.title = 'hello'
  });
}

index.html

<p id='counter' style='font-size: 100px; font-family: "Comic Sans MS";'></p>

<script>
  const counter = document.getElementById('counter')

  let count = 0
  setInterval(() => {    
3
    counter.textContent = '' + count++;
  }, 100);
</script>

octref added the webview Webview issues label Feb 27, 2018

octref assigned mjbvz Feb 27, 2018

mjbvz closed this as completed in 103d106 Feb 28, 2018

vscodebot bot locked and limited conversation to collaborators Apr 14, 2018

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When unfocusing webview with retainContextWhenHidden true, webview still get reconstructed #44681

When unfocusing webview with retainContextWhenHidden true, webview still get reconstructed #44681

octref commented Feb 27, 2018

When unfocusing webview with retainContextWhenHidden true, webview still get reconstructed #44681

When unfocusing webview with retainContextWhenHidden true, webview still get reconstructed #44681

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octref commented Feb 27, 2018