[英]How can I access unnamed elements from an HTML using javascript?
I want to set float
values for the first three li
present in my HTML using javascript. 我想使用JavaScript为HTML中出现的前三个
li
设置float
值。 I have named the parent ul
as "something". 我已将父母
ul
命名为“某物”。 Is it possible to set the float attribute for these li
without naming them? 是否可以为这些
li
设置float属性而无需命名它们?
Sure, you can find the unnamed li elements in pure javascript using this snippet: 当然,您可以使用以下代码段在纯JavaScript中找到未命名的li元素:
var children = document.getElementById('something').getElementsByTagName('li');
Where something is the name of the parent. 父母的名字在哪里。
Then you access the first three children as usual 然后您照常访问前三个孩子
children[0].style.float = "left";
children[1].style.float = "left";
children[2].style.float = "left";
#something : nth-child(1) {
float: left;
}
#something : nth-child(2) {
float: left;
}
#something : nth-child(3) {
float: left;
}
Might do what you want... 可能会做你想做的...
var elems = document.getElementById("something").getElementsByTagName("li");
for (var i = 0; i < 3; i++) {
elems[i].style.float = "left;
}
you can use getElementByTagName function 您可以使用getElementByTagName函数
eg: 例如:
document.getElementsByTagName("li");
You can use .getElementsByName
and .getElementsByTagName
. 您可以使用
.getElementsByName
和.getElementsByTagName
。
See: 看到:
<html>
<head>
<script>
function f () {
var objUl = document.getElementsByName("Test")[0];
var lstLi = objUl.getElementsByTagName("li");
for (var i=0; i < 3; i++) {
lstLi[i].style.color = "red";
}
}
</script>
</head>
<body>
<ul name="Test">
<li> One </li>
<li> Two </li>
<li> Three </li>
<li> Four </li>
</ul>
<input type="button" onclick="f()" value="Click me" />
</body>
</html>
I use style.color
here for illustrative purposes. 我在这里使用
style.color
进行说明。 Obviously, you'd want to use style.float = "left"
to float them left. 显然,您想使用
style.float = "left"
将它们向左浮动。
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