如何从文本文件读取，添加或删除Javascript中的内容？

Question

I am making a website with Javascript and I want it to have a text box, where user enters something and it reads from the text file and if it is there, it is going to output it, if it is not going to be there then I want to add it to the list, and if I want to delete something, I want to have another button which will delete the inputted word if it finds it in the list.

I can do the HTML part fine, but I have 0 experience with Javascript and can anyone tell me what functions I should use and how its going to be connected with HTML.

I know that form in HTML, which I will need should have action which is going to be connection from javascript to HTML, but other then that part I do now know how to do it in Javascript.

Any help would be appreciated! Thanks!

Answer 1

Reading a file with Node

var fs = require('fs');
fs.readFile('file.txt', function(err,data) {
  if ( err ) throw err;
  console.log("Contents of file.txt: %s",data);
});

Saving a file with Node

var fs = require('fs');
fs.writeFile("output.txt", "Hello World!", function(err) {
    if ( err ) return console.log(err);
    console.log("The file was saved!");
}); 

Further reading: Node Filesystem API