在IE中禁用退格键并使用javascript删除密钥

document.addEventListener('keydown', function(event) {
  if (event.keyCode === 8) {
    event.preventDefault();
  }
});

const input = document.getElementById('input');
input.addEventListener('keydown', function(event) {
  if (event.keyCode === 8) {
    event.preventDefault();
    const start = input.selectionStart;
    const end = input.selectionEnd;
    input.value = input.value.slice(0, start - 1) + input.value.slice(end);
  }
});