js select 循环

const arr = [1, 2, 3, 4, 5];
for (const item of arr) {
    console.log(item);
}

const str = "Hello, World!";
for (const char of str) {
    console.log(char);
}

const map = new Map([['a', 1], ['b', 2], ['c', 3]]);
for (const [key, value] of map) {
    console.log(`${key}: ${value}`);
}

const set = new Set([1, 2, 3, 4, 5]);
for (const item of set) {
    console.log(item);
}

const elements = document.querySelectorAll('.my-class');
for (const element of Array.from(elements)) {
    console.log(element);
}

const elements = document.querySelectorAll('.my-class');
for (const element of [...elements]) {
    console.log(element);
}

const arr = [1, 2, 3, 4, 5];
for (const item of [...arr]) {
    if (item === 3) {
        arr.splice(arr.indexOf(item), 1); // 安全地删除元素
    }
}