Hopefully, the above examples solved your problem! This is a short JavaScript tutorial on how to change the selected option of a select HTML element. The value attribute specifies the value to be sent to a server when a form is submitted.. The unique ID of our select element and the value that we want to select. If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: var x = document.getElementById("mySelect").selectedIndex; document.getElementById("myOption").value = "newValue"; W3Schools is optimized for learning and training. In order to pre-select an item on the drop down list you can do so prior to the page being rendered by adding a selected="selected" attribute inside the required option. submitted. onchange event for select tag in javascript. Note: If the drop-down list allows multiple selections it will only return the index of the first option selected. var select = document.getElementById("example-select"); select.options[select.options.length] = new Option('Text 1', 'Value1'); Adding options from an array. Inside our function, we loop through each option in the select element. defaultSelected. //Loop through these options using a for loop. How to clear your Facebook app cache on Android. Change the value of a specific option element: HTML reference: HTML . Hide results. //Get the select element by it's unique ID. To display the selected option in a dropdown list with JavaScript, you can try to run the following code. This option’s value can be found by using the value property. Returns the default value of the selected attribute. The content between the opening tags is what the browsers will display in a drop-down list. onchange jquery in direction option. Possible bug? If the select box allows multiple selections, the selectedIndex returns the valueof the first option. Definition and Usage The selectedIndex property sets or returns the index of the selected option in a drop-down list. This allows the user to get the value he selected from the dropdown list. We set it to 3 because the Ireland option in our list has a value attribute of 3. It can be used to remove all Get option value : form. For a multiple select element, you can loop over the list to get all selected options. For example, I have two optionsets: optionsetA, optionsetB, the selected value in optionsetB should be based on optionsetA. Take a look at the custom JavaScript function that I wrote: The JavaScript function above takes in two parameters. While using W3Schools, you agree to have read and accepted our, A String, representing the value of the value attribute of the option element. The list of selected options is an HTMLCollection object with one entry per currently selected option. 2. It’s also not a terrific idea to include an entire library just for the sake of changing a select element. on chage javascript. //If the option of value is equal to the option we want to select. Inside our function, we loop through each option in the select element. The options property returns the collection of all the option elements in the