Indicating that a select box has new values

1. How do you find the value of the selection box?
2. How to change the value of select box from JavaScript?
3. How do you show selected value in select option?
4. How do I preselect a value in dropdown?

How do you find the value of the selection box?

The val() method returns the value of selected attribute value. let selectedValue = $("#selectVal option:selected"). val(); The text() method returns a string of the selected option.

How to change the value of select box from JavaScript?

In JavaScript, selectedIndex property is used to set the value of a select box element. The selectedIndex property sets or returns the index of the selected value in a drop-down list.

How do you show selected value in select option?

Answer: Use the jQuery :selected Selector

You can use the jQuery :selected selector in combination with the val() method to find the selected option value in a select box or dropdown list.

How do I preselect a value in dropdown?

A select box also called drop down box provides an option to list down various options in the form of drop down list. You can also preselect a value in dropdown list of items in HTML forms. For that, add selected in the <option> tag for the value you want to preselect.