This code snippet defines the behavior for handling changes to...

August 25, 2025 at 10:52 PM

$('#AssignedCM').on('change', function () {

    let selectedId = this.value;

    if (selectedId != "") {

        updateWorkerInfoByUnitID(selectedId, function (phone, cell, sId) {
            $('#CMPhone').val(phone);
            $("#CMMail").attr("href", "mailto:" + sId + "@@dot.ca.gov").removeAttr("disabled");
        });

    }
    else {
        $('#CMPhone').val("");
        $("#CMMail").attr({ "href": "#", "disabled": "disabled" });
    }

});

function updateWorkerInfo(id, callback) {
    $.ajax({
        url: '?handler=WorkerInfo&id=' + id, // Ensure it matches the C# handler
        type: 'GET', // Use GET instead of POST
        dataType: 'json',
        success: function (response) {
            if (response.success) {
                let phone = response.phone;
                let cell = response.cell;
                let sId = response.sId;

                // Call the callback function with the retrieved values
                callback(phone, cell, sId);
            }
        }
    });
}

This code snippet defines the behavior for handling changes to a DOM element with the id="AssignedCM" and how it updates related data. Here's an explanation of what it does:

Listening to the Change Event:
- The $('#AssignedCM').on('change', ...) attaches an event listener to the element with id="AssignedCM". This code executes a function whenever the value of that element changes.
Retrieve Selected Value:
- let selectedId = this.value; retrieves the value of the newly selected option in the drop-down menu (or other form element).
Check Value:
- if (selectedId != "") { ... } checks if the new selection is not empty. If a valid option is selected, it proceeds; otherwise, it resets some fields.
Fetch Data with AJAX:
- The function updateWorkerInfoByUnitID (presumably defined earlier and not included in this snippet), fetches worker information using the selectedId via an AJAX request. It accepts selectedId and a callback function.
- The callback function updates the DOM based on the data received.
Specifically:
- The worker's phone number (phone) is set into the input field with id="CMPhone".
- The link id="CMMail" is updated to generate a "mailto" URL using the worker's sId, also appending "dot.ca.gov" to construct the email address. The link is also enabled (any disabled state is removed).
Handle Empty Selection:
- If the user doesn't select a valid option or clears the selection (i.e., selectedId == ""):
  - The code clears the phone number field (id="CMPhone").
  - The email link (id="CMMail") is set to "#" and gets disabled.
AJAX Function (updateWorkerInfo):
- This function makes an AJAX GET call to the server (?handler=WorkerInfo&id={selectedId}). It fetches data in JSON format. On success:
  - It extracts the phone, cell, and sId from the server's response.
  - Calls the provided callback function with the fetched data as arguments.

In Summary:

The code listens for changes to the #AssignedCM element, fetches worker information from the server based on the selected ID, and updates the phone input field and email link on the UI. If no valid selection is made, it resets these fields.

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