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的每个元素都可以移动不同的数量。所以heihachi移动超过22 px，森林法移动超过31 px等。添加所有其他名称和值。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

但是，我希望在两个数组之间有明确的关联，在这种情况下，将数组转换为一个对象数组（每个对象都有name和value属性）：< / p>

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

如果目标是在每个元素的左侧进行该度量（22px和31px），那么您可以使用display: inline-block并设置marginLeft属性HTMLElement节点：

// 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

参考文献：

Answer 2

这是一个更简单的例子：

window.names=["heihachi", "forest law"];
window.values=[22, 31];
var len=names.length;

var test = document.getElementById('test');
for (var i = 0; i < len; i++)
{
    var elm = document.createElement("span")
    elm.innerHTML = names[i];
    elm.style.marginLeft = values[i] + 'px';
    test.appendChild(elm);
}

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

2 个答案: