The 27th blog post of Xiao Liu

. . . Don't hang up at the end of the term...

Today, I finished the fourth question. The logic is a little entangled, but fortunately, there are not many problems

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>homework4</title>
</head>
<body>
<!-- 
/**
 * 
 * @author: xiaoliu
 * @type: NO.16-homework4
 * @data: 2018-01-19
 * @finished: 2018-01-1
 *
 */
 -->
<ul id="myList">
</ul>
<script>
    var myL = document.getElementById("myList");
    var count = 0;
    function removeNode() {
        var ipt = document.getElementById("remove");

        ipt.parentNode.parentNode.remove();
        for (var i = 0; i < myL.getElementsByTagName("li").length; i++) {
            myL.children[i].children[0].innerHTML = i + 1;
        }
        count = myL.getElementsByTagName("li").length;
    }
    function appendItem() {
        var hobby = prompt("Please input your hobbies", "Such as singing, dancing, etc");
        var next = document.createElement("li");
        var span1 = document.createElement("span");
        var span2 = document.createElement("span");
        var span3 = document.createElement("span");
        span1.innerHTML = ++count;
        span2.innerHTML = hobby;
        span3.innerHTML = '<input id="remove" type="button" value="Delete button" onclick="removeNode()"/>';
        next.appendChild(span1);
        next.appendChild(span2);
        next.appendChild(span3);
        myL.appendChild(next);
    }
</script>
<input type="button" value="Button" onclick="appendItem()">
</body>
</html>

In fact, the logic is quite complicated. Maybe my foundation is too poor. Besides, I didn't have time to write notes. It's very hurtful...

I've been struggling for a long time. I can't understand the usage of this remove. It seems that I can delete the value of the DOM node if I don't write it...

In fact, it took a long time to delete the node corresponding to the value. At last, it occurred to me that I could find it according to the DOM object of input itself, which has nothing to do with count.

It's late, I go to bed first, and I still don't have enough principles to do things, just like today's blog, it's delayed after 0 o'clock

Tags: Javascript

Posted on Mon, 04 May 2020 21:40:51 -0400 by paulx82