Sign Up

Have an account? Sign In Now

Sign In

Forgot Password?

Don't have account, Sign Up Here

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Have an account? Sign In Now

You must login to ask question.

Forgot Password?

Need An Account, Sign Up Here

You must login to add post.

Forgot Password?

Need An Account, Sign Up Here

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Passionable Logo Passionable Logo
Sign InSign Up

Passionable

Passionable Navigation

  • Home
  • About Us
  • Blog
  • Contact Us
Search
Ask A Question

Mobile menu

Close
Ask a Question
  • Home
  • Add group
  • Groups page
  • Feed
  • User Profile
  • Communities
  • Questions
  • Polls
  • Tags
  • Badges
  • Buy Points
  • Users
  • Help
  • New Questions
  • Trending Questions
  • Must read Questions
  • Hot Questions
Home/ Questions/Q 8902
In Process
Alek Richter
  • 0
Alek RichterEnlightened
Asked: January 11, 20222022-01-11T10:10:21+00:00 2022-01-11T10:10:21+00:00

Is it possible to write data to file using only JavaScript?

  • 0

I want to Write Data to existing file using JavaScript. I don’t want to print it on console. I want to Actually Write data to abc.txt. I read many answered question but every where they are printing on console. at some place they have given code but its not working. So please can any one help me How to actually write data to File.

I referred the code but its not working: its giving error:

Uncaught TypeError: Illegal constructor

on chrome and

SecurityError: The operation is insecure.

on Mozilla

var f = "sometextfile.txt";

writeTextFile(f, "Spoon")
writeTextFile(f, "Cheese monkey")
writeTextFile(f, "Onion")

function writeTextFile(afilename, output)
{
  var txtFile =new File(afilename);
  txtFile.writeln(output);
  txtFile.close();
}

So can we actually write data to file using only Javascript or NOT?

  • 1 1 Answer
  • 2 Views
  • 0 Followers
  • 0
    • Report
  • Share
    Share
    • Share on Facebook
    • Share on Twitter
    • Share on LinkedIn
    • Share on WhatsApp

1 Answer

  • Voted
  • Oldest
  • Recent
  • Random
  1. Alek Richter Enlightened
    2022-01-11T10:10:41+00:00Added an answer on January 11, 2022 at 10:10 am

    You can create files in browser using Blob and URL.createObjectURL. All recent browsers support this.

    You can not directly save the file you create, since that would cause massive security problems, but you can provide it as a download link for the user. You can suggest a file name via the download attribute of the link, in browsers that support the download attribute. As with any other download, the user downloading the file will have the final say on the file name though.

    var textFile = null,
    makeTextFile = function (text) {
    var data = new Blob([text], {type: ‘text/plain’});

    // If we are replacing a previously generated file we need to
    // manually revoke the object URL to avoid memory leaks.
    if (textFile !== null) {
    window.URL.revokeObjectURL(textFile);
    }

    textFile = window.URL.createObjectURL(data);

    // returns a URL you can use as a href
    return textFile;
    };

    Here’s an example that uses this technique to save arbitrary text from a textarea.

    If you want to immediately initiate the download instead of requiring the user to click on a link, you can use mouse events to simulate a mouse click on the link as Lifecube’s answer did. I’ve created an updated example that uses this technique.

    var create = document.getElementById(‘create’),
    textbox = document.getElementById(‘textbox’);

    create.addEventListener(‘click’, function () {
    var link = document.createElement(‘a’);
    link.setAttribute(‘download’, ‘info.txt’);
    link.href = makeTextFile(textbox.value);
    document.body.appendChild(link);

    // wait for the link to be added to the document
    window.requestAnimationFrame(function () {
    var event = new MouseEvent(‘click’);
    link.dispatchEvent(event);
    document.body.removeChild(link);
    });

    }, false);

    • 0
    • Reply
    • Share
      Share
      • Share on Facebook
      • Share on Twitter
      • Share on LinkedIn
      • Share on WhatsApp
      • Report
Leave an answer

Leave an answer
Cancel reply

Browse

Sidebar

Ask A Question

Stats

  • Questions 4k
  • Answers 4k
  • Best Answers 0
  • Users 3
  • Popular
  • Answers
  • Alek Richter

    How to deal with SettingWithCopyWarning in Pandas

    • 2 Answers
  • Alek Richter

    Is the Glamour College Bard's Mantle of Inspiration Overpowered?

    • 2 Answers
  • Alek Richter

    At what point is the Tavern Brawler feat better than ...

    • 2 Answers
  • Alek Richter
    Alek Richter added an answer Pandas DataFrame columns are Pandas Series when you pull them… January 13, 2022 at 2:21 pm
  • Alek Richter
    Alek Richter added an answer The handshake failure could have occurred due to various reasons:… January 13, 2022 at 2:19 pm
  • Alek Richter
    Alek Richter added an answer Mac OS X doesn't have apt-get. There is a package… January 13, 2022 at 2:18 pm

Top Members

Alek Richter

Alek Richter

  • 4k Questions
  • 1k Points
Enlightened
coinbaseprosupportnumber[Xsdwerfgtyujhnbgfderewqasdxz]

coinbaseprosupportnumber[Xsdwerfgtyujhnbgfderewqasdxz]

  • 2 Questions
  • 2 Points

Trending Tags

questin question

Explore

  • Home
  • Add group
  • Groups page
  • Communities
  • Questions
  • Polls
  • Tags
  • Badges
  • Users
  • Help
  • New Questions
  • Trending Questions
  • Must read Questions
  • Hot Questions

© 2021 Passionable. All Rights Reserved

Insert/edit link

Enter the destination URL

Or link to existing content

    No search term specified. Showing recent items. Search or use up and down arrow keys to select an item.