autocomplete on empty

client/src/views/fields/link-multiple.js

@@ -163,6 +163,14 @@ class LinkMultipleFieldView extends BaseFieldView {
      */
     autocompleteMaxCount = null
 
+    /**
+     * Trigger autocomplete on empty input.
+     *
+     * @protected
+     * @type {boolean}
+     */
+    autocompleteOnEmpty = false
+
     /**
      * Select all attributes.
      *
@@ -433,11 +441,13 @@ class LinkMultipleFieldView extends BaseFieldView {
                     setTimeout(() => this.$element.autocomplete('clear'), 300);
                 });
 
+                const minChar = this.autocompleteOnEmpty ? 0 : 1;
+
                 this.$element.autocomplete({
                     serviceUrl: () => {
                         return this.getAutocompleteUrl();
                     },
-                    minChars: 1,
+                    minChars: minChar,
                     paramName: 'q',
                     noCache: true,
                     autoSelectFirst: true,

client/src/views/fields/link.js

@@ -164,6 +164,14 @@ class LinkFieldView extends BaseFieldView {
 
     getEmptyAutocompleteResult = null
 
+    /**
+     * Trigger autocomplete on empty input.
+     *
+     * @protected
+     * @type {boolean}
+     */
+    autocompleteOnEmpty = false
+
     /** @inheritDoc */
     events = {
         /** @this LinkFieldView */
@@ -536,7 +544,7 @@ class LinkFieldView extends BaseFieldView {
                         return this.getAutocompleteUrl(q);
                     },
                     lookup: (q, callback) => {
-                        if (q.length === 0) {
+                        if (!this.autocompleteOnEmpty && q.length === 0) {
                             isEmptyQueryResult = true;
 
                             if (this.getEmptyAutocompleteResult) {