Select Menu

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The <select> element generates a drop-down menu from which the user can choose an option.

<select name="">
  <option value="1">One</option>
  <option value="2">Two</option>
  <option value="3">Three</option>
  <option value="4">Four</option>

Changing the Size

You can change the size of the selection menu with the size attribute. A size of 0 or 1 displays the standard drop-down style menu. A size greater than 1 will convert the drop-down into a box displaying that many lines, with one option per line and a scrollbar in order to scroll through the available options.

<select name="" size="4"></select>

Multi-option Selection Menus

By default, users can only select a single option. Adding the multiple attribute allows users to select multiple options at once and submit all selected options with the form. Using the multiple attribute automatically converts the drop-down menu into a box as if it had a size defined. The default size when this occurs is determined by the specific browser you are using, and it is not possible to change it back to a drop-down style menu while allowing multiple selections.

<select name="" multiple></select>

When using the multiple attribute, there is a difference between using 0 and 1 for the size, whereas no difference exists when not using the attribute. Using 0 will cause the browser to behave in whatever default manner it is programmed to do. Using 1 will explicitly set the size of the resulting box to only one row high.

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