HTMLOptionElement: Option() constructor

The Option() constructor creates a new HTMLOptionElement.

Syntax

new Option()
new Option(text)
new Option(text, value)
new Option(text, value, defaultSelected)
new Option(text, value, defaultSelected, selected)

Parameters

• text Optional
  • : A string representing the content of the element, i.e., the displayed text. If this is not specified, a default value of "" (empty string) is used.
• value Optional
  • : A string representing the value of the HTMLOptionElement, i.e., the value attribute of the equivalent <option>. If this is not specified, the value of text is used as the value, e.g., for the associated <select> element’s value when the form is submitted to the server.
• defaultSelected Optional
  • : A value of either true or false that sets the selected attribute value, i.e., so that this <option> will be the default value selected in the <select> element when the page is first loaded. If this is not specified, a default value of false is used. Note that a value of true does not set the option to selected if it is not already selected.
• selected Optional
  • : A value of either true or false that sets the option’s selected state; the default is false (not selected). If omitted, even if the defaultSelected argument is true, the option is not selected.

Examples

Just add new options

/* assuming we have the following HTML
<select id='s'>

</select>
*/

const s = document.getElementById("s");
const options = [Four, Five, Six];

options.forEach((element, key) => {
  s[key] = new Option(element, key);
});

Append options with different parameters

<select id="s"></select>

const s = document.getElementById("s");
const options = ["zero", "one", "two"];

options.forEach((element, key) => {
  if (element === "zero") {
    s[key] = new Option(element, s.options.length, false, false);
  }
  if (element === "one") {
    s[key] = new Option(element, s.options.length, true, false); // Will add the "selected" attribute
  }
  if (element === "two") {
    s[key] = new Option(element, s.options.length, false, true); // Will actually be selected in the view
  }
});

Result:

<select id="s">
  <option value="0">zero</option>
  <option value="1" selected>one</option>
  <option value="2">two</option>
  <!-- User will see two as 'selected' -->
</select>

Specifications

Browser compatibility