问为什么在模糊事件处理程序中添加一个setTimeout来修复另一个单击处理程序的“掩蔽”？

EN

<input type="text" name="input" id="input1" />
<div id="div1">Focus the input above and then click me. (Will see 1 alert)</div>
<br/>
<input type="text" name="input" id="input2" />
<div id="div2">Focus the input above and then click me. (Will see 2 alerts)</div>

$(document).ready(function() {
  function clickHandler() {
    alert('Click!');
  }

  function blurHandler() {
    alert('Blur!');
  }

  $('#input1').on('blur', function() {
    blurHandler();
  })
  $('#input2').on('blur', function() {
    window.setTimeout(blurHandler, 200);
  })

  $('#div1').on('click', function() {
    clickHandler();
  })
  $('#div2').on('click', function() {
    clickHandler();
  })
});