very simple hacked-together auto-completion demo

src/Editor.css

@@ -0,0 +1,46 @@
+.text-block {
+  display: inline-block;
+  /* border: solid 1px lightgrey; */
+  /* margin-right: 4px; */
+  /* padding-left: 2px; */
+  /* padding-right: 2px; */
+  user-select: none;
+  cursor: text;
+}
+
+.selected {
+  background-color: darkseagreen;
+  color: white;
+}
+
+.suggest {
+  color: #aaa;
+}
+
+
+.cursor {
+  display: none;
+}
+
+div:focus .cursor {
+  animation: blink 1s linear infinite;
+  display: inline-block;
+  margin-left: -1px;
+  margin-right: -3px;
+  vertical-align: text-bottom;
+  height: 20px;
+  width: 2px;
+  background-color: black;
+}
+
+.suggestions { 
+  position: absolute;
+  border: solid 1px lightgrey;
+  cursor: pointer;
+}
+
+@keyframes blink {
+  50% {
+    opacity: 0;
+  }
+}