Issue with Chrome Browser: Selections added to a dropdown list do not appear in the dropdown menu

Whenever a user selects an option from a dropdown, an Ajax event is triggered.

During this event, the options are dynamically added to the dropdown list.

Once the options are added, users should be able to click on them immediately without having to take any additional action.

In Google Chrome, after adding options to the dropdown list, the default message "Select One" still persists, even though the options have been successfully added. To actually see and select the added options, users must press the down arrow key to navigate through the list manually. This behavior differs from other browsers like Internet Explorer and Firefox.

Is there a specific piece of JavaScript or jQuery code that can automatically refresh the dropdown list display in Chrome without requiring the user to click it again?

The JavaScript code responsible for adding options when an option is clicked is as follows:

secBox = document.getElementById('sel34541_75');
secBox.length = 1;
addOption(secBox, "Option 1", "execPopDrop('sel34541_75', 34541, 'Option 1', 'type1', 'page.php')");
addOption(secBox, "Option 2", "execPopDrop('sel34541_75', 34541, 'Option 2', 'type2', 'page.php')");
addOption(secBox, "Option 3", "execPopDrop('sel34541_75', 34541, 'Option 3', 'type3', 'page.php')");
addOption(secBox, "Option 4", "execPopDrop('sel34541_75', 34541, 'Option 4', 'type4', 'page.php')");

The addOption function is defined below:

function addOption(selectbox, text, value) {
  selectbox.options[selectbox.options.length]=new Option(text,value);
}

In case the user clicks on the dropdown and then uses the down arrow key, they will notice that the dynamic options are present but not visible in the dropdown list. However, clicking on it once again will reveal the correct options in the dropdown list.

javascriptgoogle-chromedrop-down-menu

Answer №1

If you want a cross-browser solution, try this code snippet. If you require support for IE4, remember to increment the options.length by 1 before adding the new option.

Update: This modification addresses the original question.

function addOption(selectElement, textValue, attributeValue) {
  selectElement.options[selectElement.options.length] = new Option(textValue, attributeValue);
}

But why include that strange string in the option?

It appears as though you might consider evaluating the string within the value field.

Instead, how about using:

addOption(secBox, "Option 1", "sel34541_75");

Then, in the execPopDrop function, pass the select element and modify it like this:

function execPopDrop(selectElement) {
  var selectedValue = selectElement[selectElement.selectedIndex].value;
  var selectedText = selectElement[selectElement.selectedIndex].text;
  var typeValue = "type" + selectedValue.split(" ")[1]; // from Option 1
  var parameterTwo = selectedValue.replace(/[sel_]/g,""); // 34541
  // Now you have all the necessary information to perform actions as needed.
}

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