[Glitch] Fix reply button on media modal not giving focus to compose form

Port 2cd31b31778cec3b282a44f03a03844d92a4e8cc to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/app/javascript/flavours/glitch/features/compose/components/compose_form.js b/app/javascript/flavours/glitch/features/compose/components/compose_form.js
index c75906ce7..b03bc34b8 100644
--- a/app/javascript/flavours/glitch/features/compose/components/compose_form.js
+++ b/app/javascript/flavours/glitch/features/compose/components/compose_form.js
@@ -246,9 +246,14 @@ class ComposeForm extends ImmutablePureComponent {
         selectionStart = selectionEnd = text.length;
       }
       if (textarea) {
-        textarea.setSelectionRange(selectionStart, selectionEnd);
-        textarea.focus();
-        if (!singleColumn) textarea.scrollIntoView();
+        // Because of the wicg-inert polyfill, the activeElement may not be
+        // immediately selectable, we have to wait for observers to run, as
+        // described in https://github.com/WICG/inert#performance-and-gotchas
+        Promise.resolve().then(() => {
+          textarea.setSelectionRange(selectionStart, selectionEnd);
+          textarea.focus();
+          if (!singleColumn) textarea.scrollIntoView();
+        }).catch(console.error);
       }
 
     //  Refocuses the textarea after submitting.