Question

我确实有该脚本：

function() {
  var publishedDate = "";
  var yoastInfo = JSON.parse(document.head.querySelector('.yoast-schema-graph.yoast-schema-graph--main').innerHTML);
  vars = yoastInfo["@graph"];
  for(var i in vars) {
    if(vars[i]['@type'] === 'WebPage') {
      pubDateRaw=(vars[i]['datePublished']);
      break;
    }
  }
  publishedDate.concat(pubDateRaw.substring(0,4),pubDateRaw.substring(5,7),pubDateRaw.substring(8,10));
  return publishedDate;
}

运行代码时，它给了我""而不是日期。

这是json：

{
  "@context": "https://schema.org",
  "@graph": [   

    {
      "@type": "WebPage",
      "@id": "id234234",
      "url": "https://www.whatevver.com",
      "inLanguage": "de-DE",
      "name": "this is the name",
      "isPartOf": {
        "@id": "id234234
      },
      "primaryImageOfPage": {
        "@id": "id234234"
      },
      "datePublished": "2020-01-14T07:46:12+00:00",
      "dateModified": "2020-01-15T08:04:50+00:00",
      "description": "description "
    },

  ]
}

所以我需要从该json中提取datePubished。我的代码有什么问题？

修改

在你们的帮助下，我编写了以下脚本：

function() {
  var publishedDate = "";
  var yoastInfo = JSON.parse(document.head.querySelector('.yoast-schema-graph.yoast-schema-graph--main').innerHTML); 
  vars = yoastInfo["@graph"];
  for(var i in vars) {
    if(vars[i]['@type'] === 'WebPage') {
      publishedDate=(vars[i]['datePublished']); 
    }
  }



  return publishedDate;
}

现在我需要将dateTime 2020-01-14T07:46:12+00:00削减为2020-01-14 最好的解决方案是什么？

EDIT2

在以下位置找到了解决方案：To the Solution

Answer 1

给出JSON：

{
  "@context": "https://schema.org",
  "@graph": [   

    {
      "@type": "WebPage",
      "@id": "id234234",
      "url": "https://www.whatevver.com",
      "inLanguage": "de-DE",
      "name": "this is the name",
      "isPartOf": {
        "@id": "id234234" // MAKE IT AS A STRING
      },
      "primaryImageOfPage": {
        "@id": "id234234"
      },
      "datePublished": "2020-01-14T07:46:12+00:00",
      "dateModified": "2020-01-15T08:04:50+00:00",
      "description": "description "
    },

  ]
}

function() {
  let publishedDate = "";
  const yoastInfo = JSON.parse(document.head.querySelector('.yoast-schema- 
  graph.yoast-schema-graph--main').innerHTML); // I HOPE YOURE ABLE TO EXTRACT THE JSON HERE IN yoastInfo.
  vars = yoastInfo["@graph"];
  for(var i in vars) {
    if(vars[i]['@type'] === 'WebPage') {
      publishedDate=(vars[i]['datePublished']); // YOU ARE GETTING EMPTY STRING BECAUSE YOU'RE SETTING VARIABLE CALLED 'publishedDate' AND SETTING VALUE IN 'pubDateRaw'.
    }
  }
  return publishedDate;
}

请遵循说明中的注释。谢谢：））

并检查链接以获取更多说明： https://jsfiddle.net/gahzsrvj/1/

用JavaScript解析Json-Google跟踪代码管理器

1 个答案: