javascript - 将 Javascript 三元函数转换为简单函数

Question

我有一个三元函数

const resetCompletion = completed < 0 ? 0 : completed > 100 ? 100 : completed;

我需要将其转换为if else if else块的简单功能。正确的方法应该是什么？

Answer 1

它可以扩展到这样的东西：

let resetCompletion = completed;

if (completed < 0) { resetCompletion = 0; }
else if (completed > 100) { resetCompletion = 100; }

这意味着“默认情况下，resetCompletion等于completion。但是，如果completed小于零，则resetCompletion等于零，否则如果completed大于 100，则resetCompletion等于 100”

Answer 2

以下代码片段可能等效于 if 块的三元操作。

const resetCompletion = completed => {
  if (completed < 0) {
    return 0;
  }
  if (completed > 100) {
    return 100;
  }
  return completed;
};

let completed = 101;
console.log(resetCompletion(completed));

completed = -100;
console.log(resetCompletion(completed));

completed = 10;
console.log(resetCompletion(completed));