我有一个选择框,可以过滤页面上的数据库结果。每个选项的值都是查询字符串,以 ? 开头然后选择特定选项的相应名称/值对。像这样:
<select id="timeline-filter">
<option value="log">Show All</option>
<option value="?l=Previewed">Show Previewed</option>
<option value="?l=Edited">Show Edited</option>
<option value="?l=Downloaded">Show Downloaded</option>
<option value="?l=Replaced">Show Replaced</option>
<option value="?l=Deleted">Show Deleted</option>
</select>
例如,当用户选择“显示预览”等选项时,我需要执行两件事:
1) 我需要将页面重定向到 http://example.com/results?l=Previewed
2) 我需要将“显示预览”的选项设置为selected
,以便下拉列表表明这是当前的过滤器。
我读过几十篇 jQuery 和 Javascript 文章,它们几乎已经达到了目标,但还没有完全实现。我花了 3 个小时研究这个问题并尝试了各种方法,包括使用检查器设置断点和观察变量,但我就是无法做到正确。下面的 HTML 和 jQuery 脚本完成了 #1,但没有完成 #2。
<select id="timeline-filter" onchange="this.options[this.selectedIndex].value && (window.location = this.options[this.selectedIndex].value);">
<option value="log">Show All</option>
<option value="?l=Previewed">Show Previewed</option>
<option value="?l=Edited">Show Edited</option>
<option value="?l=Downloaded">Show Downloaded</option>
<option value="?l=Replaced">Show Replaced</option>
<option value="?l=Deleted">Show Deleted</option>
</select>
<script>
$(document).ready(function() {
var queryString = window.location.href.slice(window.location.href.indexOf('?')).split('?');
$("#timeline-filter > option").each(function() {
if (this.value == queryString[0]) {
this.selected = 'selected';
/* ALTERNATE POSSIBILITY -- DOESN'T WORK EITHER
$("#timeline-filter[value=this.value]").prop('selected',true)*/
}
});
});
</script>
最佳答案
你已经差不多了,试试这个:-
$(document).ready(function() {
var queryString = window.location.href.slice(window.location.href.indexOf('?'));
$("#timeline-filter > option").each(function() {
if (this.value == queryString) {
this.selected = 'selected';
}
});
});
作为您的替代方案,请尝试以下操作:-
var queryString = window.location.href.slice(window.location.href.indexOf('?'));
$("#timeline-filter > option[value='" + queryString + "']").prop('selected', true)
测试如下
var href = "dfgdfgg.html?l=Replaced"
$(document).ready(function() {
var queryString = href.slice(href.indexOf('?'));
$("#timeline-filter > option").each(function() {
if (this.value == queryString) {
this.selected = 'selected';
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="timeline-filter" onchange="this.options[this.selectedIndex].value && (window.location = this.options[this.selectedIndex].value);">
<option value="log">Show All</option>
<option value="?l=Previewed">Show Previewed</option>
<option value="?l=Edited">Show Edited</option>
<option value="?l=Downloaded">Show Downloaded</option>
<option value="?l=Replaced">Show Replaced</option>
<option value="?l=Deleted">Show Deleted</option>
</select>
关于jquery - 如果 url 查询字符串匹配,则设置选项 'selected',我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35181403/