如何使用JavaScript在循环中拆分逗号分隔的字符串和进程

const str = "apple,banana,orange";
const arr = str.split(",");
console.log(arr); // ["apple", "banana", "orange"]

const str = "apple,banana,orange";
const arr = str.split(",");

for (let i = 0; i < arr.length; i++) {
  console.log(arr[i]);
}

const str = "apple,banana,orange";
const arr = str.split(",");

arr.forEach(function(item) {
  console.log(item);
});

const str = "apple,banana,orange";
const arr = str.split(",");

const processedArr = arr.map(function(item) {
  // 对每个元素进行进程操作，例如将每个元素转换为大写
  return item.toUpperCase();
});

console.log(processedArr); // ["APPLE", "BANANA", "ORANGE"]

const str = "apple,banana,orange";
const arr = str.split(",");

const processedArr = [];

for (const item of arr) {
  // 对每个元素进行进程操作，例如将每个元素转换为大写
  processedArr.push(item.toUpperCase());
}

console.log(processedArr); // ["APPLE", "BANANA", "ORANGE"]