[英]How I set the a field in a input select (HTML) with javascript?
我将随机选择一个数字,并在具有已排序数字的选择中定义所选字段。 我如何设置该字段?
将Attribute selected =“selected”添加到要选择的选项元素。
伪代码
function foo()
{
create list of option elements
generate random number
get a single option element at index of random number
set all options attribute "selected" = null
set the option element[at index of random number] attribute selected = "selected"
}
var randomNumber = 3; // just for example
document.getElementById('select_field').selectedIndex = randomNumber;
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