Javascript Uncaught SyntaxError initializer question

JavaScript
#1

I’m trying to create a Countdown Timer mäbut I have some issues in the coding process. Can someone tell me why the console is telling me 'Uncaught SyntaxError: Missing initializer in const declaration ’ plus give me an idea on what I could code. My js. And html code is below

Javascript:

const days[] = document.getElementById('days')
const hours[] = document.getElementById('hours')
const minutes[] = document.getElementById('minutes')
const seconds[] = document.gwtElementById('seconds')

const newYears = '1 Jan 2021';

function countdown () {
  const newYearsDate = new Date(newYears);
  const currentDate = new date ();
  
  const seconds = (newYearsDate - currentDate) / 1000;
  const days = Math.floor(totalSeconds / 3600 / 24);
  const hours = Math.floor(totalSeconds / 3600) % 24;
  const minutes= Math.floor(totalSeconds / 60) % 60;
  const seconds = Math.floor(totalSeconds) % 60;
  console.log(newYearsDate - currentDate)
  
  days[].innerHTML = days;
  hours[].innerHTML = hours;
  minutes[].innerHTML = minutes;
  seconds[].innerHTML = seconds;
}
countdown()

setInterval(countdown, 1000)

Html:

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body style="background-color:white" style="color:white">
  <a href='https://postimg.cc/HcqsMVZP' target='_blank'><img src='https://i.postimg.cc/HcqsMVZP/NY-K13-large-small.jpg' border='0' alt='NY-K13-large-small'/ width="300" height="500"></a>
  <h1>Countdown-Timer</h1>
  <div class="Countdown-Timer">
    <div class="days">
      <p class="big-text" id="hours">0</p>
      <span>days</span>  
    </div>
     <div class="hours">
      <p class="big-text" id="hours">0</p>
      <span>hours</span>  
    </div>
     <div class="minutes">
      <p class="big-text" id="minutes">0</p>
      <span>minutes</span>  
    </div>
    <div class="seconds">
     <p class="big-text" id="days">0</p>
     <span>seconds</span>  
    </div>    
  </div>    
  </form>
  
  
</body>
</html>
#2

Hello there,

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

Pre-formatted-text
Pre-formatted-text1356×380 401 KB

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

#3

This is not valid JavaScript syntax:

const days[]

Hope this helps

#4

Lol not really what is a valid syntax in this example I’m creating this Countdown-Timer with a tutorial but couldnt figure out what I’ve done wrong

#5

Just to carify, the reason you get that specific error, is the interpreter does not know what to do with this syntax:

const days[]

so, it assumes you meant:

const days
// new expression
[] = document....

And const days is an uninitialized constant

#6

Thanks I cleaned up my code up a little bit but I cant see the html countdown timer anymore any suggestions on why I cant see my countdown timer anymore ?

const days = document.getElementById('days')
const hours = document.getElementById('hours')
const minutes = document.getElementById('minutes')
const seconds = document.getElementById('seconds')

const newYears = '1 Jan 2021';

function countdown () {
  const newYearsDate = new Date(newYears);
  const currentDate = new Date ();
  
  const totalSeconds = (newYearsDate - currentDate) / 1000;
  const days = Math.floor(totalSeconds / 3600 / 24);
  const hours = Math.floor(totalSeconds / 3600) % 24;
  const minutes= Math.floor(totalSeconds / 60) % 60;
  const seconds = Math.floor(totalSeconds) % 60;
  console.log(newYearsDate - currentDate)
  
  days.innerHTML = days;
  hours.innerHTML = hours;
  minutes.innerHTML = minutes;
  seconds.innerHTML = seconds;
}
countdown()

setInterval(countdown, 1000)
#7