删除动态创建的输入

Question

So is there an easy way to get the last node so I could simply delete inputs from the last one? deleteinput() function.

<script>

    var form = document.getElementById("form");


    function newinput(){    
        var input = document.createElement("input");
        input.type = "text";
        form.appendChild(input);
    }
    function deleteinput(){

        form.removeChild();

    }
</script>

Answer 1

You should add your input s some id as well so you can delete them by providing id as an argument to your deleteinput() function.

Your function will look like this

function deleteinput(name) {
    var input = document.getElementByName(name);
    form.removeChild(input);
}

Also newinput() will change accordingly:

function newinput(name) {
    var input = document.createEleement("input");
    input.type = "text";
    input.name = name;
    form.appendChild(input);
}

You can also create some global integer and generate name of input automatically by some string + incremented value of your global variable - this way you don't need to pass name argument to newinput() function.

I am not sure that this will 100% work, I did not test it. Maybe you will need to tweak it little bit but the main logic should be correct.

Answer 2

You can use the lastChild property to get the last child, and the previousSibling to step through them until you get to an input

function deleteinput() {
    for (var child = form.lastChild; child.nodeName.toLowerCase() != 'input'; child = child.previousSibling) {
    }
    if (child) {
        form.deleteChild(child);
    }
}

Answer 3

Yes you can get and remove the last element this way.

var ele = document.getElementById("parent element Id").lastChild;
ele.remove();