Re: [w3c/manifest] Feat(events): add BeforeInstallPromptEvent (#520)

mgiuca commented on this pull request.



> +            This example shows how one might prevent an automated install
+            prompt from showing until the user clicks a button to install the
+            app. In this way, the site can control the installation experience.
+          </p>
+          <pre class="example"
+               title="Using beforeinstallprompt to present an install button">
+            window.addEventListener("beforeinstallprompt", async (event) =&gt; {
+              // Suppress automatic prompting.
+              event.preventDefault();
+
+              // Show the (disabled-by-default) install button. This button
+              // resolves the installButtonClicked promise when clicked.
+              installButton.disabled = false;
+
+              // Wait for the user to click the button.
+              await installButtonClicked;

Hmm yeah. async/await is nice but a bit magic here.

Refactored into a traditional addEventListener setup. The outer function no longer needs to be async.

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