使用 jquery 从嵌套的 div 中获取 id

Question

I don't know how to put this. This has got a bit messy. I couldn't use the right words to ask the question. Here is my code:

 <div id="addfieldcontainerdropdown"> <div id="addDropdownfield"> <div id="div0"> <select name="0" style="margin: 20px" id="0"> <option value="1">1</option> <option value="2">2</option> </select> <input style="margin: 7px" id="1" placeholder="Value" onkeyup="check_if_value_set(this); return false;" type="text"> <span style="margin: 7px;cursor: pointer;" onclick="remove_fields(this);return false;"><iclass="fa fa-times"></i></span> </div> <div id="div2"> <select name="2" style="margin: 20px" id="2"> <option value="1">1</option> <option value="2">2</option> </select> <input style="margin: 7px" id="3" placeholder="Value" onkeyup="check_if_value_set(this); return false;" type="text"> <span style="margin: 7px;cursor: pointer;" onclick="remove_fields(this);return false;"><i class="fa fa-times"></i></span> </div> <div id="div4"> <select name="4" style="margin: 20px" id="4"> <option value="1">1</option> <option value="2">2</option> </select> <input style="margin: 7px" id="5" placeholder="Value" onkeyup="check_if_value_set(this); return false;" type="text"> <span style="margin: 7px;cursor: pointer;" onclick="remove_fields(this);return false;"><i class="fa fa-times"></i></span> </div> </div> <a href="javascript:void(0)" onclick="show_new_text_field(this);event.preventDefault();return false;" style="cursor:pointer"> <span id="add_new_span" class="addnew" style="float: none;margin-left: 1%;"><i class="fa fa-plus fa-fw"></i>Add New Field</span> </a> </div>

You can see there is a function named "show_new_text_field(this)" at the bottom of the code. Using this function, i need to get the id of say, div4 or select box of id 4. How can this be done ? I tried using prent() and closest(). Nothing worked. Any type of suggestions would be appreciated. Thanks in advance !!

Answer 1

Something like this?

var lastDiv = $("[id^=div]").last(); //Get Last div whose ID begins with "div"
var lastDivId = lastDiv.attr('id'); //Get ID of that div
var firstSelect = lastDiv.find('select').first(); //Get the first 'select' of that div
var firstSelectId = firstSelect.attr('id'); //Get that select's ID

console.log("Last Div: " + lastDivId); // "Last Div: div4"
console.log("First Select in " + lastDivId + ": " + firstSelectId); //"First Select in div4: 4"

In the event your div won't always start with "div", you could just select the last child div of your parent ( addDropdownfield ) by doing this:

var lastDiv = $("#addDropdownfield div").last(); //Get all children divs of addDropdownfield - from that list, just the last one