hadrysmateusz

let foo = 'bar'

/**
Don't worry about the code block, it will be saved as a gist with right language format, and auto embed to your post.
**/

hadrysmateusz

public class Hello1
{
   public static void Main()
   {
-      System.Console.WriteLine("Hello, World!");
+      System.Console.WriteLine("Rock all night long!");
   }
}

hadrysmateusz

let a = "asdf";

hadrysmateusz

const inputElement = document.getElementById("inputElement")

inputElement.onchange = (e) => {
  const file = inputElement.files[0]
  if (!file) return
  const reader = new FileReader()
  reader.onload = (e) => {
    // e.target points to the reader
    const textContent = e.target.result
    console.log(`The content of ${file.name} is ${textContent}`)

hadrysmateusz

// get a reference to the inputElement in any way you choose
const inputElement = document.getElementById("inputElement")

// get the value once
inputElement.files[0]

// get the value every time the user selects a new file
inputElement.addEventListener("change", (e) => {
  // e.target points to the input element
  const selectedFile = e.target.files[0]

hadrysmateusz

const file = new File([blob], "fileName", {type: blob.type})
const blob = new Blob([file], {type: file.type})

hadrysmateusz

// using promise.then()
file.text().then(text => /* do something */);
// using async/await
const text = await file.text();

hadrysmateusz

const reader = new FileReader()
// readyState is 0, result is null
reader.onload = () => { 
  // readyState is 2, result is the file's content
}
reader.onerror = () => {
  // readyState is 2, result is null
}
// readyState is 0, result is null
reader.readAsText(file)

hadrysmateusz

// assuming that processImage and processText are functions
if (file.type.startsWith('image/')) {
    reader.onload = processImage
    reader.readAsDataURL(file)
} else if (file.type.startsWith('text/')) {
    reader.onload = processText
    reader.readAsText(file)
}

hadrysmateusz

<input type="file" id="inputElement" />