Shakur Shakur -4 years ago 125
HTML Question

Change the options array of a select list

Is there a way to change the options array of an html select list using javascript or mootools?

I need to replace the entire options set with a new one. In my ajax response I receive an array filled in with with the new HTML options, so I try to empty the old list and add new values as follows

$('element').options.length=0;
for (i=0; i<newSet.length; i++)
{
$('element').options[i]=newSet[i];
}


The above code gives me an uncaught exception on the line inside the loop.

uncaught exception: [Exception... "Unexpected error" nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)" location: "JS frame

Just to add what worked for me:

/* get new options from json*/
var new_options = response.options;

/* Remove all options from the select list */
$('idresource').empty();
/* Insert the new ones from the array above */
for (var key in new_options)
{
var opt = document.createElement('option');
opt.text = new_options[key];
opt.value = key;
$('idresource').add(opt, null);
}

Answer Source
var new_options = ['Option 1', 'Option 2', 'Option 3'];

/* Remove all options from the select list */
$('yourSelectList').empty();

/* Insert the new ones from the array above */
$each(new_options, function(value) {
    new Element('option')
        .set('text', value)
        .inject($('yourSelectList'));
});
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