我有一个有趣的困境,我正在努力解决,而且我无法正确地绕过它。我正在使用JotForms的一些源代码,并在一个部分中:
<div id="cid_51" class="form-input jf-required">
<div style="width:100%; text-align:Left;">
<iframe onload="widgetFrameLoaded(51)" frameborder="0" scrolling="no" allowTransparency="true" class="custom-field-frame" id="customFieldFrame_51" src="" style="border:none;width:400px; height: 50px;">
</iframe>
<div class="widget-inputs-wrapper">
<input id="input_51" class="form-hidden widget-required form-widget" type="hidden" name="q51_dropdownOrganization" value="" />
<input id="widget_settings_51" class="form-hidden form-widget-settings" type="hidden" 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n%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20March%2023%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Saturday%2C%20March%2026%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20March%2030%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5CnApril%5Cn%20Saturday%2C%20April%202%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20April%206%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20April%2013%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Saturday%2C%20April%2016%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20April%2027%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Saturday%2C%20April%2030%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5CnMay%5Cn%20Wednesday%2C%20May%204%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Saturday%2C%20May%207%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Wednesday%2C%20May%2011%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%5Cn%20Saturday%2C%20May%2014%5Cn%20%203%3A00-3%3A10%20pm%5Cn%20%203%3A10-3%3A20%20pm%5Cn%20%203%3A20-3%3A30%20pm%5Cn%20%203%3A30-3%3A40%20pm%5Cn%20%203%3A40-3%3A50%20pm%5Cn%20%203%3A50-4%3A00%20pm%5Cn%20%204%3A00-4%3A10%20pm%5Cn%20%204%3A10-4%3A20%20pm%5Cn%20%204%3A20-4%3A30%20pm%5Cn%20%204%3A30-4%3A40%20pm%5Cn%20%204%3A40-4%3A50%20pm%5Cn%20%204%3A50-5%3A00%20pm%22%7D%5D"
data-version="2" />
</div>
<script type="text/javascript">
setTimeout(function()
{
var _cFieldFrame = document.getElementById("customFieldFrame_51");
_cFieldFrame.src = "//widgets.jotform.io/dynamicDropdowns/?qid=51&ref=" + encodeURIComponent(window.location.protocol + "//" + window.location.host);
_cFieldFrame.addClassName("custom-field-frame-rendered");
}, 0);
</script>
</div>
</div>
当渲染下拉元素时,它会呈现如下内容:
<div id="dropdownsContainer">
<select class="dd-0 ">
<option value="September">September</option>
</select>
<select class="dd-0 dd-1 ">
<option value="Saturday, September 26">Saturday, September 26</option>
</select>
<select class="dd-0 dd-1 dd-2 ">
<option value="3:00-3:10 pm">3:00-3:10 pm</option>
</select>
</div>
我想要完成的是,基于下拉选择的更改,它将其推送到php脚本。
这是使用的JQuery代码:
$(document).ready(function(){
$(".dd-0").on('change', function(){
var matchvalue = $(this).val(); // this.value
$.ajax({
url: 'slider.php',
data: { matchvalue: matchvalue },
type: 'post'
}).done(function(responseData) {
console.log('Done: ', responseData);
}).fail(function() {
console.log('Failed');
});
});
});
我遇到的一个问题是在控制台中记录了它:
未捕获的TypeError:无法读取属性&#39; on&#39;为null
我尝试了各种不同的方式,但仍然注意到我传递了这个消息。我错过了什么?有人可以告知为什么代码抛出错误而没有传递选定的onchange吗?