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The Select selectedIndex property in HTML DOM is used to set or return the index of the selected option in a drop-down list. The index of the drop-down list generally starts with 0 and returns -1 if no option is selected.

The default value is 0, which selects the first item in the list.

We use the selectedIndex property in JavaScript to show the index of the selected option in a dropdown list. We use the id of the dropdown list to access the element using JavaScript and then call selectedIndex on it to get the index of the selected option in the dropdown list.

The index property keeps track of which option in the dropdown is currently shown. These lines of code let the user select the current user and then removes it from the list of people. Then the screen is updated with the user removed.

We use the selectedIndex property in JavaScript to show the index of the selected option in a dropdown list. We use the id of the dropdown list to access the element using JavaScript and then call selectedIndex on it to get the index of the selected option in the dropdown list.

The value of the selected element can be found by using the value property on the selected element that defines the list. This property returns a string representing the value attribute of the <option> element in the list. If no option is selected then nothing will be returned.

Select selectedIndex Property Select the <option> element with index "2": document. getElementById("mySelect"). selectedIndex = "2"; ... Deselect all options: document. getElementById("mySelect"). ... The selectedIndex property will return "-1" if no options are selected: getElementById("mySelect"). selectedIndex;