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fix(MessageComposer): make textarea full-width in custom composer layouts #3241

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Merged
oliverlaz merged 2 commits into from
Jul 14, 2026
+35 −21
Merged

fix(MessageComposer): make textarea full-width in custom composer layouts #3241

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c5dc66d
fix(MessageComposer): make textarea full-width in custom composer lay…
oliverlaz Jul 13, 2026
4cc6b57
fix(MessageComposer): keep textarea focus ring suppressed after width…
oliverlaz Jul 14, 2026
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56 changes: 35 additions & 21 deletions src/components/MessageComposer/styling/MessageComposer.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -191,27 +191,6 @@
ease-out;
}

.str-chat__textarea {
flex: 1;
min-width: 0;
position: relative;
display: flex;
align-items: center;
width: 100%;

textarea {
background: transparent;
color: var(--str-chat__input-text-default);
font: var(--str-chat__font-body-default);
resize: none;
border: none;
box-shadow: none;
outline: none;
width: 100%;
scrollbar-width: none;
}
}

.str-chat__emoji-picker-button {
display: flex;
cursor: pointer;
Expand Down Expand Up @@ -265,6 +244,41 @@
}
}

// Scoped to the TextareaComposer's own elements (not the composer-controls
// wrapper) so the textarea fills its container in any composer layout — e.g.
// a custom composer that renders <TextareaComposer> without the default
// MessageComposerUI. Without this the bare <textarea> falls back to its
// intrinsic `cols` width (~160px).
.str-chat__textarea {
flex: 1;
min-width: 0;
position: relative;
display: flex;
align-items: center;
width: 100%;

textarea {
background: transparent;
color: var(--str-chat__input-text-default);
font: var(--str-chat__font-body-default);
resize: none;
border: none;
box-shadow: none;
outline: none;
width: 100%;
scrollbar-width: none;

// The composer intentionally has no focus ring on the textarea itself.
// Re-assert the reset on :focus-visible so it keeps outranking the global
// `.str-chat *:not(:disabled):focus-visible` outline (base.scss, (0,3,0))
// now that this rule is scoped one level shallower (was (0,3,1) under
// .str-chat__message-composer-controls, now (0,2,1)).
&:focus-visible {
outline: none;
}
}
}

.str-chat__message-composer--command-active
.str-chat__message-composer__additional-actions {
max-width: 0;
Expand Down