等待按钮单击事件，然后继续循环Javascript

Question

I have a code loop that adds options to a popup modal, with buttons alongside each option.

In a search loop, sometimes when the search returns multiple items, we must show the modal, and the user selects which part.

I want to pause the loop and wait for the user to choose an item, before continuing.

MY LOOP

$.each(rows, function (index, item) {
    SearchItems(item.split('\t')[0], item.split('\t')[1]);
});

SEARCH ITEM FUNCTION

function SearchItems(searchedPart, quantity) {

    $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        url: "OrderFormServices.asmx/GetItemInfoAdmin",
        data: "{'itemname':'" + searchedPart + "','quantity':'" + (quantity || 1) + "', 'guid':'" + custGuid + "' }",
        dataType: "json",
        success: function (result) {

            result = result.d;

            if (result.length > 1) {

                var htmlString = "";
                $.each(result, function(index, item) {
                    item.PartNumber = (item.PartNumber != "") ? item.PartNumber : item.ItemName;
                    htmlString += "<tr><td>"
                        + "<input type=\"hidden\" name=\"ItemID\" value=\"" + item.ItemID + "\">"
                        + "<input type=\"hidden\" name=\"ItemCode\" value=\"" + item.ItemCode + "\">"
                        + "<input type=\"hidden\" name=\"Price\" value=\"" + item.Price + "\">"
                        + "<input type=\"hidden\" name=\"Quantity\" value=\"" + item.Quantity + "\">"
                        + "<input type=\"hidden\" name=\"CustomerReference\" value=\"" + searchedPart + "\">"
                        + "<input type=\"hidden\" name=\"PackQuantity\" value=\"" + item.PackQuantity + "\">"
                        + "<input type=\"hidden\" name=\"FreeStock\" value=\"" + item.FreeStock + "\">"
                        + item.PartNumber + "</td><td>"
                        + item.ManufacturerName + "</td><td>"
                        + item.ItemName + "</td><td>"
                        + item.ItemDescription + "</td><td><input type='button' name=\"selectPopup\" onclick=\"ChoosePopup($(this).closest('tr'));\" class='btn  btn-primary btn-xs' value='Select'></td></tr>";
                });
                $("#tbodyPopupContent").html(htmlString);
                $("#PopUpNormalProduct").modal();
                modalfix();
                $("#divPopupWindow").parent("").addClass("quicksearchpopup");

//////////////////////////////////////////////////////////////////////////
//////////////// WAIT FOR BUTTON CLICK AND PERFORM CODE///////////////////
//////////////////////////////////////////////////////////////////////////

                $("#partNumber").prop("disabled", false);

            } else if (result.length < 1) {
                $("#partNumber").prop("disabled", false);
                $('#partNumber').focus();
            }
            else {
                ///////
            }
        }
    });
}

The popup item buttons fire a ChoosePopup() function.

function ChoosePopup(row) {

    var $hidden_fields = row.find("input:hidden");
    var $tds = row.find("td");

    var newItem = {
        ItemID: parseFloat($hidden_fields.eq(0).val()),
        ItemCode: $hidden_fields.eq(1).val(),
        ItemDescription: $tds.eq(3).text(),
        ItemName: $tds.eq(2).text(),
        Price: parseFloat($hidden_fields.eq(2).val()),
        Quantity: parseFloat($hidden_fields.eq(3).val()),
        CustomerReference: $hidden_fields.eq(4).val(),
        PackQuantity: parseFloat($hidden_fields.eq(5).val()),
        FreeStock: parseFloat($hidden_fields.eq(6).val())
    };

    AddNewRow(newItem, true);
    $("#PopUpNormalProduct").modal("hide");
}

How can I wait for this ChoosePopup() function to complete, before continuing the loop?

Answer 1

定义全局变量，并根据弹出窗口的要求，将其余代码移至ChoosePopup（）函数。

Answer 2

I think you should re-think the way you are approaching the problem. You should fire your ChoosePopup function with a callback to do the rest of the work based on the user input.

You might consider passing the rows array into the SearchItems function, so that you can setup your callback to iterate through the remaining items in rows.

Here's an example that doesn't require duplicated code.

 const items = [1, 2, 3, 4, 5] //main function which writes buttons from an array function makeButtons(array) { //copy the array so we can keep track of which items are left to process after click event var unProcItems = array.slice() $.each(array, function(index, item) { var exit = false //remove the item from the processed array unProcItems.splice(unProcItems.indexOf(item), 1) //make our button var button = document.createElement('button') button.innerHTML = `Button ${item}` //if something then hook up a click event with callback if (item == 3) { button.onclick = function(event) { //call our makeButtons function in the callback passing in the unprocessed items array makeButtons(unProcItems) //remove the click event so it can't be fired again event.target.onclick = null } exit = true } document.getElementById('content').append(button) //exit the loop if our flag was set if (exit) return false; }) } makeButtons(items); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div id="content"> </div>