Resolve #3126

src/client/app/common/views/components/autocomplete.vue

@@ -215,6 +215,11 @@ export default Vue.extend({
 					}
 				}
 			} else if (this.type == 'emoji') {
+				if (this.q == null || this.q == '') {
+					this.emojis = this.emojiDb.filter(x => x.isCustomEmoji && !x.aliasOf);
+					return;
+				}
+
 				const matched = [];
 				const max = 30;
 

src/client/app/common/views/directives/autocomplete.ts

@@ -109,7 +109,7 @@ class Autocomplete {
 
 		if (isEmoji && opened == false) {
 			const emoji = text.substr(emojiIndex + 1);
-			if (emoji != '' && emoji.match(/^[\+\-a-z0-9_]+$/)) {
+			if (!emoji.includes(' ')) {
 				this.open('emoji', emoji);
 				opened = true;
 			}