将操作结果显示为选择按钮

Display result of a operation as a choice button

有没有办法将这个操作的结果显示为一个选择按钮?

var number = prompt("Enter a random number");
var number = number % 4;

这是您要找的吗?

var number = prompt("Enter a random number");
number = number % 4;
$('body').append('<button>' +number+ '</button>');

请注意,您不能 re-declare 变量 number,否则您将清除之前存在的值(即用户刚刚 typed-in 的值) .

var number = prompt("Enter a random number");
number = number % 4;
$('body').append('<button>' +number+ '</button>');
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

如果这是您要实现的目标,您可以这样做:

makeButton();

function makeButton() {
  var number = prompt("Enter a random number");
  var btnEl;

  if (number) {
    if (isNaN(number)) {
      console.log('The input is not a number');
      return;
    }
    number = number % 4;
    btnEl = document.createElement('input');
    btnEl.setAttribute('type', 'button');
    btnEl.setAttribute('value', number);
    btnEl.addEventListener('click', () => {
      console.log(`This buttons value is: ${number}`);
    });

    document.querySelector('body').appendChild(btnEl);
    return;
  }

  console.log('A value is required!');
}