javascriptnode.jsasynchronouseval

await is only valid in async function - eval in async

I want to eval() some lines of code inside of async function. While the following code is ok,

async function foo()
{
  await foo1();
  await foo2();
}

the following throws an error: await is only valid in async function

let ctxScript = 'await foo1(); await foo2();';
async function foo()
{
  eval( ctxScript );
}

How could I handle this? My foo() should be async as it is Puppetteer controller function

Solution

  • foo() should not necessarily be async, as that has no effect on the execution context of eval. Instead, a possible solution is to wrap your ctxScript in a self-executing async function, like so: eval("(async () => {" + ctxScript + "})()")