javascript - 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

我做到了:

function increment (){
     for (var i = 0; i <= 100;  i++){
         text.innerHTML += parseInt(i)
      }
 }

setTimeout(increment, 200)

Answer 1

如果您想要实现的话，您需要使用 setInterval 来进行实际计数:

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>