javascript 如何使用javascript设置ID？
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How to set ID using javascript?
提问by Abdelouahab Pp
I'm generating a page with lot of product, and for this, i need lot of ID, and i did it using a server side (Python) so i send for every product its own <div id='hello1'> test </div>
我正在生成一个包含大量产品的页面，为此，我需要很多 ID，并且我使用服务器端 (Python) 完成了它，因此我为每个产品发送了它自己的 <div id='hello1'> test </div>
Now because the user will dinamycaly set a value and see the result in the browser, i want to generate another ID, to this i've found btoa("hello1")so i generate another ID
现在因为用户将 dinamycaly 设置一个值并在浏览器中查看结果，我想生成另一个ID，为此我找到了btoa("hello1")所以我生成另一个ID
So the question, how do i put btoa("hello1")in <div>?
那么问题来了，我该如何btoa("hello1")输入<div>？
Edit: what i want to generate is another <div>and not updating the first one.
编辑：我想要生成的是另一个<div>而不是更新第一个。
<input id="{{str(product["avt"]["fto"])}}" > this will become <input id="12232" > because it is special to Tornado Template
<span>New price :</span>
<span id=btoa({{str(produit["avt"]["fto"])}})> This is where i use innerHTML </span>
as you can see, the users will put a value and see it dynamically.
如您所见，用户将输入一个值并动态查看它。
This will work from Python using:
这将在 Python 中使用：
<span id="{{base64.b64encode(str(produit["avt"]["fto"]))}}"></span>
but i if it can be done using Javascript, the server will be free for the half of the operations!
但是我如果可以使用Javascript来完成，服务器将免费进行一半的操作！
回答by Daniel Imms
Do you mean like this?
你的意思是这样吗？
var hello1 = document.getElementById('hello1');
hello1.id = btoa(hello1.id);
To further the example, say you wanted to get all elements with the class 'abc'. We can use querySelectorAll()to accomplish this:
为了进一步举例，假设您想获取所有具有“abc”类的元素。我们可以用它querySelectorAll()来完成这个：
HTML
HTML
<div class="abc"></div>
<div class="abc"></div>
JS
JS
var abcElements = document.querySelectorAll('.abc');
// Set their ids
for (var i = 0; i < abcElements.length; i++)
abcElements[i].id = 'abc-' + i;
This will assign the ID 'abc-<index number>'to each element. So it would come out like this:
这将为'abc-<index number>'每个元素分配 ID 。所以它会是这样的：
<div class="abc" id="abc-0"></div>
<div class="abc" id="abc-1"></div>
To create an element and assign an idwe can use document.createElement()and then appendChild().
要创建一个元素并分配一个id我们可以使用document.createElement()然后appendChild()。
var div = document.createElement('div');
div.id = 'hello1';
var body = document.querySelector('body');
body.appendChild(div);
Update
更新
You can set the idon your element like this if your script is in your HTML file.
id如果您的脚本在您的 HTML 文件中，您可以像这样在您的元素上设置。
<input id="{{str(product["avt"]["fto"])}}" >
<span>New price :</span>
<span class="assign-me">
<script type="text/javascript">
var s = document.getElementsByClassName('assign-me')[0];
s.id = btoa({{str(produit["avt"]["fto"])}});
</script>
Your requirements still aren't 100% clear though.
不过，您的要求仍然不是 100% 清楚。
