如何<span>从包含完整网页代码的变量中</span>收集特定值

Question

I scraped a web page with the price of bitcoin and have the complete web page code stored in a variable. 我用比特币的价格抓取了一个网页，并将完整的网页代码存储在一个变量中。 How do I extract the span: 如何提取跨度：

 <span class="text-large2" data-currency-value>8128.61</span>

from the whole code? 从整个代码？ By the way the number 8128.61 changes every time the page is refreshed as the price is updated 顺便说一下，随着价格的更新，每次刷新页面时数字8128.61都会改变

Here is my full code: 这是我的完整代码：

 $.getJSON('http://www.whateverorigin.org/get?url=' + encodeURIComponent('https://coinmarketcap.com/currencies/bitcoin/') + '&callback=?', function(data){ console.log(data.contents); });

 body { background-color: lightblue; }

 <!DOCTYPE html> <html> <body> <html lang="en"> <head> <title>Web Scraper</title> <link rel="stylesheet" href="css/style.css"> </head> <body> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="js/scripts.js"></script> </body> </html> </body>

Answer 1

you can use something like below to extract the value 您可以使用类似下面的方法来提取值

    $.getJSON('http://www.whateverorigin.org/get?url=' + encodeURIComponent('https://coinmarketcap.com/currencies/bitcoin/') + '&callback=?', function(data){
    console.log($(data.contents).find('span[data-currency-value]').html());
});

Answer 2

you can do this without Jquery also 你也可以不用Jquery

var htmlData = `your html`;
var divNode = document.createElement("div");
divNode.innerHTML = html;

after this you can access all HTML element which is inside htmlData 之后，您可以访问htmlData所有HTML元素

like 喜欢

divNode.getElementsByClassName("test")

如何<span>从包含完整网页代码的变量中</span>收集特定值

问题描述

2 个解决方案

解决方案1
1 已采纳 2018-03-27 15:52:22

解决方案2
0 2018-03-27 15:57:20

如何<span>从包含完整网页代码的变量中</span>收集特定值

问题描述

2 个解决方案

解决方案1 1 已采纳 2018-03-27 15:52:22

解决方案2 0 2018-03-27 15:57:20

解决方案1
1 已采纳 2018-03-27 15:52:22

解决方案2
0 2018-03-27 15:57:20