如何每秒将 String 值递增 1 JS

Question

我有一个值var x = "2"。我怎样才能每秒增加 x 以便从我定义 x 开始的一秒，x 等于 3？

我的代码如下所示：

<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

您可以使用javascript setInterval函数https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval

例如：

var x = 0;

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

然后每一秒它都会递增“x”变量。

Answer 2

使用 setInterval 并将其设置为一个 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>

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