将 Js 变量转为元数据

Question

在 head 部分我有一个 js:

var product = {
                ProductID: '97087',
                Thema: '18',
                CategoryID: '49',
                Region1: ['21'],
                Region2: ['35'],
                Region3: [],
                Price: '22,00',
                Brand: 'Brand',
            };

有没有办法把 ProductID 变成像

这样的 Meta 标签

<meta name="brand" content="97087">

Answer 1

这可以通过遍历产品对象的键并将其与关联值附加到 <head> 来实现。下面的代码将导致：

<meta name="ProductID" content="97087">
<meta name="Thema" content="18">
<meta name="CategoryID" content="49">
<meta name="Region1" content="21">
<meta name="Region2" content="35">
<meta name="Region3" content="">
<meta name="Price" content="22,00">
<meta name="Brand" content="Brand">

var product = {
                ProductID: '97087',
                Thema: '18',
                CategoryID: '49',
                Region1: ['21'],
                Region2: ['35'],
                Region3: [],
                Price: '22,00',
                Brand: 'Brand',
            };
            
var metaTags = Object.keys(product).map(function(key) {
  return '<meta name="' + key + '" content="' + product[key] + '">';
}).join('');

var headElem = document.querySelector('head');
headElem.innerHTML += metaTags;


console.log(headElem.querySelectorAll('meta'));

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
  
</body>
</html>

Answer 2

保存此代码段以进行测试

只需使用 JS 创建元标记并将其附加到文档的头部

运行它并右键单击以检查 head 标签以查看元数据已创建

   

var product = {
                ProductID: '97087',
                Thema: '18',
                CategoryID: '49',
                Region1: ['21'],
                Region2: ['35'],
                Region3: [],
                Price: '22,00',
                Brand: 'Brand',
            };


//<meta name="brand" content="97087">

var meta = document.createElement('meta');
meta.setAttribute('name',product.Brand);
meta.setAttribute('content',product.ProductID);
document.getElementsByTagName('head')[0].appendChild(meta);

将 Js 变量转为元数据

Turn Js Variable into Meta data

javascript

metadata

google-tag-manager

meta