我正在创建一个脚本来重新排列页面上的<div>元素。它可以将它们放入数组，但是该数组的内容如下：
[object HTMLDivElement],[object HTMLDivElement],[object HTMLDivElement],[object HTMLDivElement],
以下任何一项均无效：
my_array.innerHTML
my_array.outerHTML
my_array.html
my_array.toString()
所以如何将这个数组重新变成看起来像这样的东西：<div class="rect red"></div><div class="rect green"></div><div class="rect blue"></div><div class="rect yellow"></div>，并在页面上将其渲染为div？
这里是完整代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
.rect {width:24px; height:12px; border-radius:12px; border:4px solid rgba(0,0,0,0.25); margin-bottom:12px}
.red {background-color:#c21}
.green {background-color:#1c3}
.blue {background-color:#28f}
.yellow {background-color:#ed1}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
</head>
<body>
<div id="target">
<div class="rect red"></div>
<div class="rect green"></div>
<div class="rect blue"></div>
<div class="rect yellow"></div>
</div>
<script>
function move_before(arr, ndx){ //move the element one place earlier in the array
var move = arr[ndx];
arr.splice(ndx, 1); //from index #'ndx', remove 1 element
arr.splice(ndx-1, 0, move); //from the index before #'ndx', remove 0 elements, then insert the value of 'move'
}
$(".rect").click( function() { // rearrange the order of divs when one is clicked
var sort = Array.from( $(this).parent().children() );
var current_index = $(this).index();
move_before(sort, current_index); // put each element into a new array
var i = 0;
var updated_arr = [];
while (i <= sort.length) {
updated_arr.push(sort[i]);
i = i+1;
}
document.getElementById("target").innerHTML = updated_arr;
});
</script>
</body>
</html>使用appendChild()：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
.rect {width:24px; height:12px; border-radius:12px; border:4px solid rgba(0,0,0,0.25); margin-bottom:12px}
.red {background-color:#c21}
.green {background-color:#1c3}
.blue {background-color:#28f}
.yellow {background-color:#ed1}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
</head>
<body>
<div id="target">
<div class="rect red"></div>
<div class="rect green"></div>
<div class="rect blue"></div>
<div class="rect yellow"></div>
</div>
<script>
function move_before(arr, ndx){ //move the element one place earlier in the array
var move = arr[ndx];
arr.splice(ndx, 1); //from index #'ndx', remove 1 element
arr.splice(ndx-1, 0, move); //from the index before #'ndx', remove 0 elements, then insert the value of 'move'
}
$(".rect").click( function() { // rearrange the order of divs when one is clicked
var sort = Array.from( $(this).parent().children() );
var current_index = $(this).index();
move_before(sort, current_index); // put each element into a new array
var i = 0;
var updated_arr = [];
while (i <= sort.length) {
updated_arr.push(sort[i]);
i = i+1;
}
for(i=0;i<updated_arr.length-1;i++){
document.getElementById("target").appendChild(updated_arr[i]);
}
});
</script>
</body>
</html>类似于：
var div=document.createElement("div");
console.log(div);
document.body.appendChild(div);
无需创建updated_arr。只需加入outerHTML数组中HTMLElement对象的sort。
move_before(sort, current_index);
document.getElementById("target").innerHTML = sort.map(elem => elem.outerHTML).join('');
也将您的事件绑定更新为$("#target").bind('click', '.rect', function() { ...... });
进行两项小更改以使其起作用：
<而不是=<以避免一次额外的迭代。Element.appendChild()在节点中添加元素。您可以在这里https://developer.mozilla.org/en-US/docs/Web/API/Node/appendChild使用this的出色工作！
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<style>
.rect {
width: 24px;
height: 12px;
border-radius: 12px;
border: 4px solid rgba(0, 0, 0, 0.25);
margin-bottom: 12px;
}
.red {
background-color: #c21;
}
.green {
background-color: #1c3;
}
.blue {
background-color: #28f;
}
.yellow {
background-color: #ed1;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
</head>
<body>
<div id="target">
<div class="rect red"></div>
<div class="rect green"></div>
<div class="rect blue"></div>
<div class="rect yellow"></div>
</div>
<script>
function move_before(arr, ndx) {
//move the element one place earlier in the array
var move = arr[ndx];
arr.splice(ndx, 1); //from index #'ndx', remove 1 element
arr.splice(ndx - 1, 0, move); //from the index before #'ndx', remove 0 elements, then insert the value of 'move'
}
$(".rect").click(function() {
// rearrange the order of divs when one is clicked
var sort = Array.from(
$(this)
.parent()
.children()
);
var current_index = $(this).index();
move_before(sort, current_index); // put each element into a new array
var i = 0;
var updated_arr = [];
while (i <= sort.length) {
updated_arr.push(sort[i]);
i = i + 1;
}
updated_arr.map(element =>
document.getElementById("target").appendChild(element)
);
});
</script>
</body>
</html>