Rocket.Chat/app/meteor-autocomplete/client/inputs.html

<template name="inputAutocomplete">
    <input type="text" {{attributes}}>
    {{> autocompleteContainer}}
</template>

<template name="textareaAutocomplete">
    <textarea {{attributes}}>{{> UI.contentBlock}}</textarea>
    {{> autocompleteContainer}}
</template>

<template name="_autocompleteContainer">
    {{#if isShowing}}
    <div class='-autocomplete-container'>
        {{#if isLoaded}}
            {{#unless empty}}
            <ul class='-autocomplete-list'>
                {{#each filteredList}}
                <li class="-autocomplete-item">
                    {{#with ../currentTemplate }}
                        {{#with ..}}  {{! original 'data' context to itemTemplate}}
                            {{> ..}}  {{! return value from itemTemplate }}
                        {{/with}}
                    {{/with}}
                </li>
                {{/each}}
            </ul>
            {{else}}
                {{> noMatchTemplate }}
            {{/unless}}
        {{else}}
            {{> loading}}
        {{/if}}
    </div>
    {{/if}}
</template>

<template name="_noMatch">
    (<i>no matches</i>)
</template>