javascript - 如何在 javascript for 循环中为每个额外的 innerHTML 元素更改 css

Question

<div id="test"></div>
<script type="text/javascript">

window.names=["heihachi", "forest law"];
window.values=[22, 31];
len=names.length
for (var i = 0; i < len; i++)
{
    document.getElementById('test').innerHTML+= names[i];
    //names[i].css=margin-left: values[i]px;//

}

</script>

这就是我想做的。除了第 10 行之外，for 循环完全按预期工作。我希望添加到该 innerHTML 的每个元素都移动不同的量。因此，heihachi 移动了 22 px，forest law 移动了 31 px，等等。对于添加的所有其他名称和值。我放在那里的是我的尝试(伪代码)，但它不起作用。我怎样才能做到这一点？

Answer 1

我建议如下:

// declare variables in the local scope:
var names=["heihachi", "forest law"],
    values=[22, 31],
// get a reference to the element outside of the loop (once, versus multiple times):
    test = document.getElementById('test'),
// create an element in which to wrap the text:
    span = document.createElement('span'),
// declare a variable which will become a reference to the node on which we're working:
    _tmp;

// to move the element/words around we need to have 'position: relative':
span.style.position = 'relative';

// iterate over the names array:
for (var i = 0, len = names.length; i < len; i++)
{
    // working on a clone of the 'span':
    _tmp = span.cloneNode();
    // appending a child textNode to that node:
    _tmp.appendChild(document.createTextNode(names[i]));
    // setting the left property of the Node's style object:
    _tmp.style.left = values[i] + 'px';
    // appending the node to the 'test' node:
    test.appendChild(_tmp);    
}

JS Fiddle demo .

然而，我更愿意在两个数组之间有一个明确的相关性，在这种情况下将数组转换为一个对象数组(每个对象都有一个名称和值 属性):

var namesAndPositions = [{
    'name' : 'heihachi',
    'value' : 22
},{
    'name' : 'forest law',
    'value' : 31
}],
    test = document.getElementById('test'),
    span = document.createElement('span'),
    _tmp;

span.style.position = 'relative';

for (var i = 0, len = namesAndPositions.length; i < len; i++)
{
    _tmp = span.cloneNode();
    _tmp.appendChild(document.createTextNode(namesAndPositions[i].name));
    _tmp.style.left = namesAndPositions[i].value + 'px';
    test.appendChild(_tmp);
}

JS Fiddle demo .

如果目标是测量(每个元素左侧的 22px 和 31px)，那么您可以改用 display: inline-block 并设置 HTMLElement 节点的 marginLeft 属性:

// everything above this point in the code remains the same

span.style.display = 'inline-block';

for (var i = 0, len = namesAndPositions.length; i < len; i++)
{
    _tmp = span.cloneNode();
    _tmp.appendChild(document.createTextNode(namesAndPositions[i].name));
    _tmp.style.marginLeft = namesAndPositions[i].value + 'px';
    test.appendChild(_tmp);
}

JS Fiddle demo .

引用资料:

• > document.createElement() .
• > document.createTextNode() .
• > document.getElementById() .
• > HTMLElement.style .
• > Node.appendChild() .