# code-block-pro/1.27.7/build/shiki/samples/javascript.sample

Code Block Pro – Beautiful Syntax Highlighting, version 1.27.7. 30 lines.

- Page: https://pluginprobe.com/plugins/code-block-pro/1.27.7/code/build/shiki/samples/javascript.sample
- Raw: https://pluginprobe.com/plugins/code-block-pro/1.27.7/raw/build/shiki/samples/javascript.sample
- Modified: 2023-09-03T01:04:34+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/code-block-pro/1.27.7/code/build/shiki/samples/javascript.sample#L10-L20`.

```
function resolveAfter2Seconds(x) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(x);
    }, 2000);
  });
}

// async function expression assigned to a variable
const add = async function (x) {
  const a = await resolveAfter2Seconds(20);
  const b = await resolveAfter2Seconds(30);
  return x + a + b;
};

add(10).then((v) => {
  console.log(v); // prints 60 after 4 seconds.
});

// async function expression used as an IIFE
(async function (x) {
  const p1 = resolveAfter2Seconds(20);
  const p2 = resolveAfter2Seconds(30);
  return x + (await p1) + (await p2);
})(10).then((v) => {
  console.log(v); // prints 60 after 2 seconds.
});

// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/async_function

```