jQuery - 将text和var添加到值

Question

我想将普通文本和jQuery值添加到输入值。

var amount = $('option:selected', this).val();
    $('.customfield').val('clicks,<?php echo $userdata['id'] ?>,' + amount +);

这就是我所拥有的，但这并不起作用。有人可以向我解释它是如何完成的吗？

Answer 1

试试这个：

    $('.customfield').val('clicks,<?php echo $userdata["id"] ?>,' + amount);

//--------double quote to id as is open and   ---------^^^^
//                   closed by single quote and remove last +

Answer 2

var amount = $('option:selected').val();
    $('.customfield').val('clicks,<?php echo $userdata['id'] ?>,' + amount);

Answer 3

var amount = $('option:selected').val(); // or var amount = $('#selectDropwdownId').val();
    $('.customfield').val("clicks,<?php echo $userdata['id'] ?>," + amount );

Answer 4

试试这个

var amount = $('option:selected').val();
$('.customfield').val('clicks, <?php echo $userdata["id"] ?>,'+amount+');