英文:
I want to add a class when accessing a specific url
问题
I entered the code as below so that the class is added only in a specific URL, but it doesn't work.
Could you please help me what is wrong?
if (location.href.indexOf('url') > -1) {
document.getElementsByClassName('className').classList.add('NewClass');
}
英文:
I entered the code as below so that the class is added only in a specific url, but it doesn't work.
Could you please help me what is wrong?
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
if(location.href.indexOf('url') > -1){
document.getElementsByClassName('className').classList.add('NewClass');
}
<!-- end snippet -->
答案1
得分: 1
getElementsByClassName方法返回一个包含所有具有指定类名的元素的HTML集合。要向集合中的元素添加类，您需要遍历集合并将类添加到每个单独的元素中。
尝试这样做：
if (location.href.indexOf('url') > -1) {
var elements = document.getElementsByClassName('className');
for (var i = 0; i < elements.length; i++) {
elements[i].classList.add('NewClass');
}
}
在这段代码中，我们首先将HTML集合存储在elements变量中。然后，我们使用for循环遍历集合中的每个元素，并使用classList.add方法向每个单独的元素添加类'NewClass'。
英文:
The getElementsByClassName method returns an HTML collection which containing all the elements with the specified class name. To add a class to the elements in the collection, you need to loop through the collection and add the class to each individual element.
Try this:
if (location.href.indexOf('url') > -1) {
var elements = document.getElementsByClassName('className');
for (var i = 0; i < elements.length; i++) {
elements[i].classList.add('NewClass');
}
}
In this code, we first store the HTML collection in the elements variable. Then, we iterate over each element in the collection using a for loop and add the class 'NewClass' to each individual element using the classList.add method.
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