Learn React with TypeScript 3

async and await

async and await are two JavaScript keywords we can use to make asynchronous code read almost identically to synchronous code:

1. Let's look at an example of consuming our wait function we created in the last section by entering the following code into the TypeScript playground, after the wait function declaration:

const someWork = async () => {  try {    const result = await wait(500);     console.log(result);  } catch (ex) {    console.log(ex);  }};someWork();

• We have created an arrow function called someWork that is marked as asynchronous with the async keyword.
• We then call wait prefixed with the await keyword. This halts execution of the next line until wait has completed.
• The try / catch will catch any errors.

So, the code is very ...