使用 Javascipt 将 json 文件中的多个值写入 HTML 表

Question

Heyy!

I have a small problem. I've tried a lot but haven't found a solution yet. ^^

There is a json file with multiple values. I would like to write the values from the file into an HTML table with Javascript (not php!).

---

Here is an example:

Json File:

{
   "628e191673ae8f7750c62fce": {
     "name": "John",
     "surname": "Smith",
     "age": "24"
   },
   "628e1fd0d27981c6250d886c": {
     "name": "Fred",
     "surname": "Bloggs",
     "age": "32"
   },
   "628e20c805f38641bdc08d7d": {
     "name": "Joe",
     "surname": "Harris",
     "age": "27"
   }
}

The table should then look like this:

Name	Surname	Age
John	Smith	24
Fred	Bloggs	32
Joe	Harris	27

---

What is the best way for me to do this with Javascript? Thank you in advance. :)

Answer 1

Well, your JSON is a bit special since your data-rows are not an array, they are properties... But you could do it like this...

const jsonData = {
   "628e191673ae8f7750c62fce": {
     "name": "John",
     "surname": "Smith",
     "age": "24"
   },
   "628e1fd0d27981c6250d886c": {
     "name": "Fred",
     "surname": "Bloggs",
     "age": "32"
   },
   "628e20c805f38641bdc08d7d": {
     "name": "Joe",
     "surname": "Harris",
     "age": "27"
   }
};


var firstIteration = true;

// create table element
for(var key1 in jsonData) { /* key1 will be the hex name */
  var row = jsonData[key1];

  // create tr element
  if (firstIteration) {
    for(var key2 in row) { /* key2 will be the attributes of the current row */
      // create th element with key2 as content
    }
    firstIteration = false;
  }
  for(var key2 in row) {
    // create td element with row[key2] as content
  }
  // close tr element
}
// close table element

Answer 2

You can break down the code into little bite-sized functions that build up the table row-by-row creating HTML strings along the way, and then adding them to the DOM.

 const data = {"628e191673ae8f7750c62fce":{name:"John",surname:"Smith",age:"24"},"628e1fd0d27981c6250d886c":{name:"Fred",surname:"Bloggs",age:"32"},"628e20c805f38641bdc08d7d":{name:"Joe",surname:"Harris",age:"27"}}; // Returns a simple cell function getCell(data) { return `<td>${data}</td>`; } // Returns an string of cells HTML // `map` returns an array so we need to `join` // the elements together function getRow(data) { return data.map(getCell).join(''); } // Returns a set of rows by `mapping` // over the values of each object, and creating // a new row for each object function getRows(data) { return data.map(obj => { const values = Object.values(obj); return `<tr>${getRow(values)}</tr>`; }).join(''); } // Get the object values from the data const objs = Object.values(data); // Get the keys from the first object of `objs`. // This way we don't have to hard-code the headings // in the HTML markup const headers = Object.keys(objs[0]); // Construct a table using the functions const table = ` <table> <tbody> <tr class="headings">${getRow(headers)}</tr> ${getRows(objs)} </tbody> </table> ` // Add everything to a container document.body.insertAdjacentHTML('beforeend', table);

 table { border-collapse: collapse; border: 1px solid #454545; width: 300px;} .headings { background-color: #efefef; font-weight: 600; text-transform: capitalize; } td { padding: 0.3em; border: 1px solid #efefef;}

Additional documentation

• Template/string literals

• map

• join

• insertAdjacentHTML

• Object.values

Answer 3

Simple way for doing it:

 const jsonfile = { "628e191673ae8f7750c62fce": { "name": "John", "surname": "Smith", "age": "24" }, "628e1fd0d27981c6250d886c": { "name": "Fred", "surname": "Bloggs", "age": "32" }, "628e20c805f38641bdc08d7d": { "name": "Joe", "surname": "Harris", "age": "27" } } const parent = document.getElementById('table'); Object.keys(jsonfile).forEach(element => { const { name, surname, age } = jsonfile[element] let child = `<tr> <th>${name}</th> <th>${surname}</th> <th>${age}</th> </tr>` parent.insertAdjacentHTML('beforeend', child); });

 <table id="table"> <tr> <th>Name</th> <th>Surname</th> <th>Age</th> </tr> </table>