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An easy way to create a customize dynamic table in react js

abdulbasit313 profile image Abdul Basit Updated on ・3 min read

In this article I will try to teach how to create a dynamic table in react.
Ya I know its quite simple, but this tutorial is for beginners and a beginner should know how to get this kind of stuff done.

I am assuming you know how to create a project and how javascript classes work. If you dont't, read this article first.

Lets begin
We have data in the form of array of objects just like APIs. You can use API too.

Lets create a simple component and store the data in the state.

import React, { Component } from 'react'

class Table extends Component {
   constructor(props) {
      super(props) //since we are extending class Table so we have to use super in order to override Component class constructor
      this.state = { //state is by default an object
         students: [
            { id: 1, name: 'Wasif', age: 21, email: 'wasif@email.com' },
            { id: 2, name: 'Ali', age: 19, email: 'ali@email.com' },
            { id: 3, name: 'Saad', age: 16, email: 'saad@email.com' },
            { id: 4, name: 'Asad', age: 25, email: 'asad@email.com' }
         ]
      }
   }

   render() { //Whenever our class runs, render method will be called automatically, it may have already defined in the constructor behind the scene.
      return (
         <div>
            <h1>React Dynamic Table</h1>
         </div>
      )
   }
}

export default Table //exporting a component make it reusable and this is the beauty of react

We have 4 students with id, name, age and email address. Since our table will be dynamic so it doesn't matter if we have 4 or 100 students.

For Table Data

Now we want to print out students data in the Dom. We often use map function in react to itearate over array.
Lets write a separate function for table data and calling it in our render method. This approach will make our code cleaner and easier to read.

   renderTableData() {
      return this.state.students.map((student, index) => {
         const { id, name, age, email } = student //destructuring
         return (
            <tr key={id}>
               <td>{id}</td>
               <td>{name}</td>
               <td>{age}</td>
               <td>{email}</td>
            </tr>
         )
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }

You may have noticed our renderTableData method only returns tr not the tr inside table. Since tr alone can not be a child of div so we have to wrap tr inside table and tbody in our render method.

table header

We are done with table data, a table should have a header too. Lets work on header.

For Table Header

Now we will write another method for table header.

   renderTableHeader() {
      let header = Object.keys(this.state.students[0])
      return header.map((key, index) => {
         return <th key={index}>{key.toUpperCase()}</th>
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  <tr>{this.renderTableHeader()}</tr>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }

Object.Keys gives us all the keys of students in the form of array and we stored it in a variable header. So we can iterate the header (array) using map method.
You may think why we don't use forEach, it does the same. The reason is when we want to return something as result we use map method, while forEach doesn't return anything, it just iterates over array's elements.

Styling

Lets add little bit styling in our table to make it look good

#title {
  text-align: center;
  font-family: arial, sans-serif;
}

#students {
  text-align: center;
  font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
  border-collapse: collapse;
  border: 3px solid #ddd;
  width: 100%;
}

#students td, #students th {
  border: 1px solid #ddd;
  padding: 8px;
}

#students tr:nth-child(even){background-color: #f2f2f2;}

#students tr:hover {background-color: #ddd;}

#students th {
  padding-top: 12px;
  padding-bottom: 12px;
  text-align: center;
  background-color: #4CAF50;
  color: white;
}

table header

That's all, we are done with our basic table. In next article we will add some features in table, like sorting, adding and removing data. Here is the codepen link of the project.

Here you can read functional component with hooks implementation.

Posted on by:

abdulbasit313 profile

Abdul Basit

@abdulbasit313

Web and app developer. Love writing.

Discussion

pic
Editor guide
 

Hey im glad to start the discussion once again, I want to edit the row field may be by one time click on the row or having a separate button ,Can you explain to make it happen.

 

It depends on your approach. How do you want to edit? Do you have input fields for edit row data? I mean the same input fields which will be used to add and edit data, and the second approach is to convert the same row's td into input field

 

Yes , in the same implementation of you, can you just start the basics

this repo may help github.com/AbdulBasit313/React-Typ... instead of tr I am using list here.

It's cool btw, but my case is to just edit the tr on a button click and update the state

What do you want to happen on clicking button? where do you want to write edit data?

 

After looking at your code it looks easy to me now 😀, I am trying to create table too, but I don't have table data, what I have is row no and column no and based on them I am tring to generate empty table for input, the problem which I am facing is creating header, do you have any suggestions for that ??, I really need some help

 

You mean let's say you want to generate 3×4 table?
I am not really sure but you can store rows and columns numbers into variable and based on that generate the table.

 

Yes, I am able to generate rows, but facing issue with creation of headers and then storing tables value in to variable in form of list of dictionary,
Below is the part which is I am trying to build.
codesandbox.io/s/issue-with-header...

 

Hi Abdul, Thanks for the tutorial appreciated your work..I am having an issue to be resolved let me know how will you destruct and array of objects which are having key values with space in between for example

const {Stock symbol,Stock name,No of share,Buy price,Current price,Profit Loss}= a;
its throwing error like identified expected
the example u have used all are single words for key like id,name,age,email...
also explain for two words like first name?

 
let student = {
  "roll no" : 654321,
  "first name" : "John" 
  } 

const {"roll no":  id,  "first name": name} = student

console.log(id, name)

Let me know if it helps...

 

Thanks for the tutorial. I'm a react beginner.

My question is, what if the number of column is unknown too?

Thanks again

 

Here you go... you just need to change renderTableData function with below code. Let me know if it helps...

   renderTableData() {
      return this.state.students.map((student, index) => {
         let col = Object.keys(student)
         return (
            <tr key={student.id}>
               {col.map((val, index) => {
                  return <td key={index}>{student[col[index]]}</td>
               })}
            </tr>
         )
      })
   }
 

Thank you,

How can I hide the first column?

 
 

Thank you very much...!! It is very helpful.

 

Suppose we want structure like "jsfiddle.net/cyril123/3n8xv3hL/" , how implement complex data with rowspan in react. Searched material-table but no luck it doesn't support complex data(material-table.com/).

 

Hi Abdul Basit, this is very helpful to me. Thank you!

How can I add rows to table dynamically? For example, if I create a table for a customer that have unknown number phone devices. So if a customer have 2 phone devices, we should have 2 rows, and if 3 phone devices, we should have 3 rows, etc.

Would you be able to show us how to add rows to a table?

Thanks
Ahmed

 
key={Math.random()}

The key is supposed to be consistent between renders, random generated is a very bad solution.
Better use the array index if you don't have an unique identifier.

 

hmmm... nice catch. fixed

 

hey man i have doubt in this how do i contact you?

 

What if we want to render row from the data from the input field?

 

For that we will use another function called addData that will be called on clicking submit button, and we will add input data to our object using spread operator.

 

Ya it's a task given by my manager, finished it.i used a form with input fields and on submit I got the value by document.getelementbyid and pushed into the state object and rendered it as a seperate row and also added a delete functionality by filter out by the id prop.Btw great article!

Why did you use document.getElementById? In react we use e.target.value

Ya its cool,but i had more input fields in the form and I struggled to manage them,can you come up with a solution, [e,target.name]?

 

can you please share an api implementation of this using axios.

 

I am almost done with a draft, will publish in a day or two...

 
 

how to create a table like

| Name | 1/1/2020 | 2/1/2020 | 3/1/2020 | 4/1/2020 | ........... (can be any number of dates)header

| Raj | RajData | RajData | RajData | RajData | ............(data as per date for this name)body

| . | X Data | X Data | X Data | X Data | ............(data as per date for this name)body

.
.

names are dynamic too so please help me to solve this type of table structure in reactjs
please help i have no clue for this kind of table as i am beginner

 

hello please help me for this error

import React, { useState } from "react";

import "./AddUser.css";
import {
validate,
validatorRequire,
validatorNumber,
} from "../../shared/util/validator";
import { Link } from "react-router-dom";
import * as userService from "./service";

const AddUser = () => {
const [formState, setFormaState] = useState({
errors: [],
users: [],
});
// class addUser extends Component {
// componentDidMount() {
// userService
// .getUsers()
// .then((response) => this.setFormaState({ users: response.data }));
// }
// }
// componentDidMount() {

// }
const addUserSubmitHandler = (event) => {
event.preventDefault();
const errors = validateForm();

if (errors.length) {
  alert("gikhare sag");
  setFormaState({ ...formState, errors });
  return;
}
userService.addUser(formState.user);
setFormaState({ errors: [], users: userService.getUsers() });

};

const validators = {
code: [validatorRequire(), validatorNumber()],
fname: [validatorRequire()],
lname: [validatorRequire()],
phone: [validatorRequire(), validatorNumber()],
fee: [validatorRequire(), validatorNumber()],
};

const farsiNames = {
code: "کد",
fname: "نام",
lname: "نام خانوادگی",
phone: "شماره تماس",
fee: "دستمزد",
};

const changeHandler = (e) => {
const user = {};
const name = e.target.name;
const value = e.target.value;
user[name] = value;
const errors = validate(value, validators[name], farsiNames[name]);
setFormaState({
...formState,
user: { ...formState.user, ...user },
errors,
});
};
const validateForm = () => {
let errors = [];
const fields = Object.keys(farsiNames);
for (let field of fields) {
const fieldErrors = validate(
formState.user ? formState.user[field] : undefined,
validators[field],
farsiNames[field]
);
errors = errors.concat(fieldErrors);
}

return errors;

};

return (


{formState.errors.map((error, index) => (

{error}

))}

element="input"
type="text"
id="code"
name="code"
className="code form-control m-2 col-md-1 d-block"
placeholder="کد"
onChange={changeHandler}
/>
    <input
      element="input"
      type="text"
      id="fname"
      name="fname"
      className="fname form-control m-2 col-md-2 d-block"
      placeholder="نام"
      onChange={changeHandler}
    />
    <input
      element="input"
      type="text"
      id="lname"
      name="lname"
      className="lname form-control m-2 col-md-2 "
      placeholder="نام خانوادگی"
      onChange={changeHandler}
    />
    <input
      element="input"
      type="text"
      id="phone"
      name="phone"
      className="phone form-control m-2 col-md-3"
      placeholder="شماره تماس"
      onChange={changeHandler}
    />
    <input
      element="input"
      type="text"
      id="fee"
      name="fee"
      className="fee form-control col-md-3 m-2 p-3"
      placeholder="دستمزد"
      validators={[validatorRequire]}
      onChange={changeHandler}
    />
  </div>

  <button className="btn btn-success mx-auto d-block mt-5">
    اضافه کردن
  </button>

  <div className="container mt-5">
    <table className="table table-striped">
      <thead>
        <tr>
          <th scope="col">ردیف</th>
          <th scope="col">{farsiNames.code}</th>
          <th scope="col">{farsiNames.fname}</th>
          <th scope="col">{farsiNames.lname}</th>
          <th scope="col">{farsiNames.phone}</th>
          <th scope="col">{farsiNames.fee}</th>
        </tr>
      </thead>

      <tbody>
        {formState.users.map((user, index) => {
          return (
            <tr key={index}>
              <th scope="row">{index + 1}</th>
              <td>{user.code}</td>
              <td>{user.fname}</td>
              <td>{user.lname}</td>
              <td>{user.phone}</td>
              <td>{user.fee}</td>
              <td>
                <Link to={"/userfee/" + user.code}>
                  <span role="button" className="btn btn-primary btn-sm">
                    Edit
                  </span>
                </Link>
              </td>
            </tr>
          );
        })}
      </tbody>
    </table>
  </div>
</form>

);
};
export default AddUser;

error = react-dom.development.js:11102 Uncaught TypeError: formState.users.map is not a function
at AddUser (AddUser.js:157)

 

Please ask this question on stackoverflow

 

How can I add buttons to each row [For example Buttons could be View, Edit, Delete ]

 

Inside renderTableData method.

 
 

He Abdul Basit,thanks for the very helpfull tutorial .How can i map a simple array[0,1....,8] in a table(3X3).

 

You need to write conditions inside your method...

 

thanks Abdul Basit.
so i need two for loops as usual in js

 

Easy to follow! it helped me a lot. thanks!

 

Thanks Abdul Basit for this tutorial, it helped me out, I have spend over 3 hours trying to render data from json on a table correctly. Thanks again.

 

Thank you, great code, easy to follow!!

 

please, how can i just show specific columns, for example in the exercise I just want to see the Name and the Age

 

if i need to create a empty table of 10 rows where user can input data as form and submit the whole table to mobx store. how do i do it?

 

How do I renderTableData without refreshing whenever there's new data added to the state?

 

How you are adding new data? you just need to use spread operator if you are adding data locally. like [...oldState, newObj]

 

brother, I need help regarding the quilljs? can you help me out?

 

Sorry, I never worked with quill. so no idea... if you want to know something related react I am here.

 

Hi,

Thanks for the Totorial, well explained!
Where Can I find the other features "like sorting, adding and removing data" you mentioned above.
Can I get the link of that Tutorial.
Thanks

 
 

So no follow up? : )

 

You used too many ids. Be careful

 

how to add search and sorting in the table

 

You can use ant design for that. By the way I have plan to update this article in couple of days.

 

Sir you done very well . THANKS U SO MUCH . i have a question , i want to call a component on the base of the column data as props for this component by clicking on a col.

 

Sorry, I didn't understand what do you want to ask. Do you want to toggle data or what?