如何每秒将字符串值增加 1 JS

Question

I have a value var x = "2" . How can I increment x each second so that one second from when I defined x, x will equal to 3?

My code is shown bellow:

<img src="cookie.jpg" style="text-align:center; width:250px;" id="cookie" onclick="Click()">
<h1 id="score">0</h1>
<script>
  var cookie = document.getElementById("cookie");
  function Click() {
    var scoreStr = document.getElementById("score");
    var score = parseInt(scoreStr.textContent);
    score ++;
    scoreStr.textContent = score;
  }
</script>

Answer 1

Use a setInterval and set it to one second => 1000

 let display = document.getElementById('display') let x = display.textContent; // textContent returns a string value setInterval(()=>{ // lets change the string value into an integer using parseInt() // parseInt would not be needed if the value of x was `typeof` integer already display.textContent = parseInt(x++) }, 1000)

 <div id="display">2</div>

Answer 2

You can use javascript setInterval function https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval

For example:

var x = 0;

setInterval(() => {
  x = x + 1;
}, 1000); //1000ms = 1 second

Then each second it will increment the "x" variable.