当单击外部然后使用按键焦点时，焦点输入不起作用

Question

我在网站上使用了angluarJS和Jquery。但是我有问题。 重新加载页面时，我可以使用F4键进行焦点输入并搜索客户

当我在外面单击然后按F4时，输入文本搜索不起作用，但单击输入则可以正常工作。那么我该如何解决呢？ 请帮我。谢谢。 我的HTML

<input id="customerSearchInput" placeholder="Tìm kiếm khách hàng (F4)" type="text" class="form-control" focus-me="shouldBeOpen"
    aria-label="Customer" ng-model="searchCustomer" onfocus="this.select();" autocomplete="off"/>
<div class="output-complete output-complete-customer " ng-show="searchCustomer">
    <ul ng-hide="searchCustomer &amp;&amp; list_customer.length == 0">
        <li
            ng-repeat="suggestion in list_customer|filter:searchCustomer|filter:suggestion.customer_code"
            ng-click="customerClicked(suggestion)" index="$index" class="">
            <span class="pull-right">{{suggestion.mobile}}</span>
            <div class="user-info">
                <span class="name-info">{{suggestion.name}}</span>
                <span>Mã: {{suggestion.customer_code}}</span>
            </div>
        </li>
    </ul>
    <div class="not-found"
        ng-show="searchCustomer &amp;&amp; suggestion.length == 0">Không tìm
        thấy khách hàng phù hợp
    </div>
</div>

AngularJS

$(()=>{
    $(document).on('keydown', function (event) {
        if (event.which == 115 && event.target.id != 'customerSearchInput') {
            setTimeout(function(){
                $("#customerSearchInput").focus().select();
           },300);
        }

     });
    
})