Question

66

How can you read a file line by line in JavaScript?

rated 0 times [ 67] [ 1] / answers: 1 / hits: 36764 / 13 Years ago, thu, july 28, 2011, 12:00:00

I'm writing a web-app for the iPad that will be loading data from a text file. (A sample data set is around ~400 kb). I have everything set up except the file reading. The way I have set up my code, you pass an object which reads a file line by line.

How can I read a file line by line?

If there is no direct way to read a file line by line, can someone please show me an example of how to read a file into a string object? (so that I can use the split method :P)

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andrewb

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answered 13 Years ago ryanulyssesb · Accepted Answer

This could work, if I understood what you want to do:

var txtFile = new XMLHttpRequest();

txtFile.open(GET, http://website.com/file.txt, true);

txtFile.onreadystatechange = function()

{

  if (txtFile.readyState === 4) {  // document is ready to parse.

    if (txtFile.status === 200) {  // file is found

      allText = txtFile.responseText; 

      lines = txtFile.responseText.split(n);

    }

  }

}

txtFile.send(null);