label

let str = "";

loop1: for (let i = 0; i < 5; i++) {
  if (i === 1) {
    continue loop1;
  }
  str = str + i;
}

console.log(str);
// Expected output: "0234"

label:
  statement

// 第一个 for 语句被标记为“loop1”
loop1: for (let i = 0; i < 3; i++) {
  // 第二个 for 语句被标记为“loop2”
  loop2: for (let j = 0; j < 3; j++) {
    if (i === 1 && j === 1) {
      continue loop1;
    }
    console.log(`i = ${i}, j = ${j}`);
  }
}

// 输出：
// i = 0, j = 0
// i = 0, j = 1
// i = 0, j = 2
// i = 1, j = 0
// i = 2, j = 0
// i = 2, j = 1
// i = 2, j = 2

let i, j;

// 第一个 for 语句被标记为“loop1”
loop1: for (i = 0; i < 3; i++) {
  // 第二个 for 语句被标记为“loop2”
  loop2: for (j = 0; j < 3; j++) {
    if (i === 1 && j === 1) {
      break loop1;
    }
    console.log(`i = ${i}, j = ${j}`);
  }
}

// 输出：
// i = 0, j = 0
// i = 0, j = 1
// i = 0, j = 2
// i = 1, j = 0

// 从 1 到 100 的数字
const items = Array.from({ length: 100 }, (_, i) => i + 1);
const tests = [
  { pass: (item) => item % 2 === 0 },
  { pass: (item) => item % 3 === 0 },
  { pass: (item) => item % 5 === 0 },
];
let itemsPassed = 0;

itemIteration: for (const item of items) {
  for (const test of tests) {
    if (!test.pass(item)) {
      continue itemIteration;
    }
  }

  itemsPassed++;
}

// 从 1 到 100 的数字
const items = Array.from({ length: 100 }, (_, i) => i + 1);
const tests = [
  { pass: (item) => item % 2 === 0 },
  { pass: (item) => item % 3 === 0 },
  { pass: (item) => item % 5 === 0 },
];
let itemsPassed = 0;

for (const item of items) {
  let passed = true;
  for (const test of tests) {
    if (!test.pass(item)) {
      passed = false;
      break;
    }
  }
  if (passed) {
    itemsPassed++;
  }
}

// 从 1 到 100 的数字
const items = Array.from({ length: 100 }, (_, i) => i + 1);
const tests = [
  { pass: (item) => item % 2 === 0 },
  { pass: (item) => item % 3 === 0 },
  { pass: (item) => item % 5 === 0 },
];
let allPass = true;

itemIteration: for (const item of items) {
  for (const test of tests) {
    if (!test.pass(item)) {
      allPass = false;
      break itemIteration;
    }
  }
}

// 从 1 到 100 的数字
const items = Array.from({ length: 100 }, (_, i) => i + 1);
const tests = [
  { pass: (item) => item % 2 === 0 },
  { pass: (item) => item % 3 === 0 },
  { pass: (item) => item % 5 === 0 },
];
let allPass = true;

for (const item of items) {
  let passed = true;
  for (const test of tests) {
    if (!test.pass(item)) {
      passed = false;
      break;
    }
  }
  if (!passed) {
    allPass = false;
    break;
  }
}

foo: {
  console.log("脸");
  break foo;
  console.log("这句不会被执行");
}
console.log("交换");

// 输出：
// "脸"
// "交换"

L: function F() {}

"use strict";
L: function F() {}
// SyntaxError: functions cannot be labelled

L: function* F() {}
// SyntaxError: generator functions cannot be labelled