Update InputGroupStyle.js

components/lib/inputgroup/style/InputGroupStyle.js

@@ -1,10 +1,41 @@
 import BaseStyle from 'primevue/base/style';
 
+const css = `
+@layer primevue {
+    .p-inputgroup {
+        display: flex;
+        align-items: stretch;
+        width: 100%;
+    }
+
+    .p-inputgroup-addon {
+        display: flex;
+        align-items: center;
+        justify-content: center;
+    }
+
+    .p-inputgroup .p-float-label {
+        display: flex;
+        align-items: stretch;
+        width: 100%;
+    }
+
+    .p-inputgroup .p-inputtext,
+    .p-fluid .p-inputgroup .p-inputtext,
+    .p-inputgroup .p-inputwrapper,
+    .p-fluid .p-inputgroup .p-input {
+        flex: 1 1 auto;
+        width: 1%;
+    }
+}
+`;
+
 const classes = {
     root: 'p-inputgroup'
 };
 
 export default BaseStyle.extend({
     name: 'inputgroup',
+    css,
     classes
 });