Your syntax is incorrect, you should pass the value as the second parameter: jQuery(this).prev("li").attr("id","newId");. ... <看更多>

Attribute 與Property 的差異、jQuery 相關程式碼解析。 ... Case 1： .attr(name, value) 設定value 值. <input type="checkbox" class="checkbox-3" ... ... <看更多>

jQuery comes with a bunch of DOM related methods that make it easy to access and manipulate elements and ... ... <看更多>

In my function you will see that the form action url and the input value are both set using jQuery. $("#test").on("click", function(){ let id = ... ... <看更多>

<select>. <option data-id="1">one</option>. <option data-id="2">two</option>. <option data-id="3">three</option>. </select>. ... <看更多>