热从 javascript 反转 html 列表的顺序？

Question

I currently have this code in JavaScript

function addTask() {
    // Declaring Variables
    var item = document.getElementById("text_field").value;
    var text = document.createTextNode(item);
    var list_element = document.createElement("li");
    var checkbox = document.createElement("input");
    
    checkbox.setAttribute("type", "checkbox");
    list_element.appendChild(checkbox);
    list_element.appendChild(text);
    document.getElementById("todo-list").appendChild(list_element);
}

This works fine to create a list, but the list items are added at the bottom of the html list. How do I add the new user input to the top of the html list?

Answer 1

I think you can place them in an array then reverse them. this will be an example below

    function addTask() {
        // Declaring Variables
        var item = document.getElementById("text_field").value;
        var text = document.createTextNode(item);
        var list_element = document.createElement("li");
        var checkbox = document.createElement("input");
    
    checkbox.setAttribute("type", "checkbox");
    list_element.appendChild(checkbox);
    list_element.appendChild(text);
    document.getElementById("todo-list").appendChild(list_element);
}
    function reverseElement(){
 var reversedElement = Array.from(document.getElementById("todo-list")).reverse()
} 

Answer 2

Use prepend instead of append .

Here is the working example:

 function addTask() { // Declaring Variables var item = document.getElementById("text_field").value; var list_element = document.getElementById('tasks'); var li = document.createElement("li"); li.innerText = item; list_element.prepend(li); }

 <input id="text_field" /> <button onclick="addTask()">Add</button> <div> <h1>Tasks</h1> <ol id="tasks"></ol> </div>