Topic: autocomplete arbitrarily adds data to dropdown after pressing enter

studioinsight free asked 5 years ago

This is my autocomplete:

<div class="md-form">
                <i class="fas fa-search prefix fa-sm text-default"
                    style="    font-size: 24px!important;
    height: 24px;
    bottom: 0;
    width: 24px;
    margin: auto;"
                <input type="search" id="form-autocomplete" class="form-control mdb-autocomplete" autocomplete="off"
                    placeholder="Cerca locale.."
                <button class="mdb-autocomplete-clear">
                    <svg fill="#000000" height="24" viewBox="0 0 24 24" width="24" xmlns="">
                        <path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z" />
                        <path d="M0 0h24v24H0z" fill="none" />


Using standard js initialization :


This is what data looks like at initialization:enter image description here

You can clearly see there is only one item both in the dropdown and in the array passed ad initialization, and search input is valued with "9"

Okay, let's suppose I now press ENTER with the search input containing "9". Look what happens:

enter image description here

Retrosteps: Pressed enter with searchbox containing "9" text, dropdown closed, cleared the searchbox using normal delete button, retyped "9", dropdown now shows two items. Also when checking the array which I passed at initialization, I notice it now contains two items. Why?

Togas free answered 3 years ago

    this.$input.on('keyup', function (e) {
      if (e.which === enterCharCode) {

        if (!$input.val())) {




        count = -1;
        nextScrollHeight = -45;
        return count;

In mdb.js (mdb4 jquery) it is defined that enter in search bar appents it to data. You can just enter a return in if of "enterCharCode"

Marcin Luczak staff commented 3 years ago

Hi @Togas,

Thank you for your help and contribution to our community :)

Regards, Marcin

MDBootstrap staff answered 5 years ago

Hi studioInsight,

The idea behind this feature was to let users add autocomplete examples for future use after they type something in the search box. This added value is stored only in the current session of the browser so the data you are passing to the autocomplete is not changed. In your usage, it might be not expected. You can comment code that adds this feature if you do not want this functionality.

Commenting this code in mdb.js should disable this feature:

for (var item in {
  if ([item].toLowerCase().indexOf($inputValue.toLowerCase()) !== -1) {
    var option = $("<li>".concat([item], "</li>"));

If you need additional help I am here for you.

Best Regards, Piotr

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Specification of the issue

  • ForumUser: Free
  • Premium support: No
  • Technology: MDB jQuery
  • MDB Version: 4.8.5
  • Device: W10
  • Browser: Chrome
  • OS: W10
  • Provided sample code: No
  • Provided link: No