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javascript - 来自 JSON 的 DOM 表

问题描述

需要帮助如何在表中添加自定义列，例如，第一列需要是列 DIED 之后的 ID 我需要添加列年龄。我尝试在表格中间添加一个名为 Age 的列，但是空地发生了移动，并且该字段显示了应该在父亲列中显示的信息。该表是从 JSON 动态生成的，无需使用 innerHTML。

const ANCESTRY_FILE = [
  {
    name: "Carolus Haverbeke",
    sex: "m",
    born: 1832,
    died: 1905,
    father: "Carel Haverbeke",
    mother: "Maria van Brussel"
  },
  {
    name: "Emma de Milliano",
    sex: "f",
    born: 1876,
    died: 1956,
    father: "Petrus de Milliano",
    mother: "Sophia van Damme"
  },
  {
    name: "Maria de Rycke",
    sex: "f",
    born: 1683,
    died: 1724,
    father: "Frederik de Rycke",
    mother: "Laurentia van Vlaenderen"
  }
];

function showPeople(element, people) {
  element = document.querySelector(".people");
  let table = document.createElement("table");
  table.className = "people__table";
  let thead = document.createElement("thead");
  let tbody = document.createElement("tbody");

  function addThead(table, keys) {
    let tr = document.createElement("tr");

    for (let i = 0; i < keys.length; i++) {
      let td = document.createElement("td");
      td.textContent = `${keys[i]}`;
      tr.appendChild(td);
    }
    thead.appendChild(tr);
    table.appendChild(thead);
  }

  for (let i = 0; i < people.length; i++) {
    let child = people[i];
    if (i === 0) {
      addThead(table, Object.keys(child));
    }
    let tr = document.createElement("tr");
    tr.className = "person";
    Object.keys(child).forEach(function(elem) {
      let td = document.createElement("td");
      td.textContent = `${child[elem]}`;
      tr.appendChild(td);
    });
    table.appendChild(tbody);
    tbody.appendChild(tr);
  }

  element.appendChild(table);
}

showPeople("element", ANCESTRY_FILE);
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>repl.it</title>
    <link href="style.css" rel="stylesheet" type="text/css" />
  </head>
  <body>
    <div class="people"></div>
    <script src="script.js"></script>
  </body>
</html>

标签： javascriptjsondomhtml-table

解决方案

这只是一种使用地图和模板的有趣方法。请注意，在我们构建表之前，我们使用一个Array.map函数来转换我们的 JSON 并将 ID 和 Age 数据添加到对象中。

我不知道你想要什么 ID，但你可以解决这个问题。

const ANCESTRY_FILE = [{
    name: "Carolus Haverbeke",
    sex: "m",
    born: 1832,
    died: 1905,
    father: "Carel Haverbeke",
    mother: "Maria van Brussel"
  },
  {
    name: "Emma de Milliano",
    sex: "f",
    born: 1876,
    died: 1956,
    father: "Petrus de Milliano",
    mother: "Sophia van Damme"
  },
  {
    name: "Maria de Rycke",
    sex: "f",
    born: 1683,
    died: 1724,
    father: "Frederik de Rycke",
    mother: "Laurentia van Vlaenderen"
  }
];

const buildHeader = (data) => Object.keys(data).map(k => `<th>${k}</th>`).join('');
const buildRow = (data) => Object.keys(data).map(k => `<td>${data[k]}</td>`).join('');

function showPeople(people) {
  let element = document.querySelector(".people");
  let table = document.createElement("table");
  table.classList.add("people__table");
  let thead = document.createElement("thead");
  thead.innerHTML = `<tr>${buildHeader(people[0])}</tr>`;
  table.appendChild(thead);
  let tbody = document.createElement("tbody");
  tbody.innerHTML = people.map(p => `<tr>${buildRow(p)}</tr>`).join('');
  table.appendChild(tbody);
  element.appendChild(table);
}

// Function to add the custom data first.
const customPeople = (data) => data.map((p,i) => {
  return {
    id: i, // Default the ID field to be index for now.
    name: p.name,
    sex: p.sex,
    born: p.born,
    died: p.died,
    age: p.died - p.born, // Compute our age field
    father: p.father,
    mother: p.mother
  };
});

// Note we call to transform our data before building table.
showPeople(customPeople(ANCESTRY_FILE));
<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>repl.it</title>
  <link href="style.css" rel="stylesheet" type="text/css" />
</head>

<body>
  <div class="people"></div>
  <script src="script.js"></script>
</body>

</html>

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