如何使用 JavaScript 进行计数

Question

我一直在尝试使用 JavaScript 创建计数，但它不起作用我做了：function increment (){     for (var i = 0; i <= 100;  i++){         text.innerHTML += parseInt(i)      } }setTimeout(increment, 200)

Answer 1

您需要使用setInterval以进行实际计数，如果这是您想要实现的目标：

function countUp() {

  var i = 0; // a counter which is displayed every 100ms

   // create interval which fires the callback every 100ms.

   // `interval` holds the interval ID, which is later used to clear the

   // interval (stop calling the callback)

  var interval = setInterval(function() { 

    text.innerHTML = i++; // write `i` and increment

    

    // if `i` is grater than 100 then clear the interval (stop calling the callback)

    if (i > 100) clearInterval(interval);

  }, 100);

}

countUp();

<div id="text"></div>