The Option()
constructor creates a new HTMLOptionElement
.
Syntax
var optionElementReference = new Option(text, value, defaultSelected, selected);
Parameters
text
Optional- A
DOMString
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
DOMString
representing the value of theHTMLOptionElement
, 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
Boolean
that sets theselected
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
Boolean
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> */ var s = document.getElementById('s'); var options = [Four, Five, Six]; options.forEach(function(element,key) { s[key] = new Option(element,key); });
Append options with different parameters
/* assuming we have the following HTML <select id="s"> <option>First</option> <option>Second</option> <option>Third</option> </select> */ var s = document.getElementById('s');
var options = [ 'zero', 'one', 'two' ];options.forEach(function(element, key) {
if (element == 'zero') { s[s.options.length] = new Option(element, s.options.length, false, false); } if (element == 'one') { s[s.options.length] = new Option(element, s.options.length, true, false); // Will add the "selected" attribute } if (element == 'two') { s[s.options.length] = new Option(element, s.options.length, false, true); // Just will be selected in "view" }}); /* Result <select id="s"> <option value="0">zero</option> <option value="1" selected="">one</option> <option value="2">two</option> // User will see this as 'selected' </select>
*/
Specification
Specification | Status | Comment |
---|---|---|
HTML5 The definition of 'Option' in that specification. |
Recommendation |