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如何在 Chrome Dev Tools 的全局范围内设置断点?我在下面的本地函数范围中有我的变量。这在全球范围内看起来如何?谢谢!

function calc() {
  var a = parseInt(document.querySelector('#value1').value);
  var b = parseInt(document.querySelector('#value2').value);
  var op = document.querySelector('#operator').value;
  var calculate;

  if (op == 'add') {
    calculate = a + b;
  } else if (op == 'min') {
    calculate = a - b;
  } else if (op == 'div') {
    calculate = a / b;
  } else if (op == 'mul') {
    calculate = a * b;
  }
  document.querySelector('#result').innerHTML = calculate;
}
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