4 examples of 'await is only valid in async function' in JavaScript

10
function makeAwaitFunc(variant?: string): any {
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    // Return an await function tailored to the given options.
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    switch (variant) {
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        case 'in':  return getExtraInfo(traverseInPlace);
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        case 'top': return (n: number) => getExtraInfo(traverseInPlace, n);
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        default:    return getExtraInfo(traverseClone);
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    }
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}

34
return function asyncFunction() {
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  const args = Array.from(arguments);
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  return new Promise(function (resolve, reject) {
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    let gen;
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    function step(next) {
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      const value = next.value;
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      if (next.done) {
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        return resolve(value);
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      }
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      if (value instanceof Promise) {
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        return value.then(
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          result => step(gen.next(result)),
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          error => {
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            try {
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              step(gen.throw(error));
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            } catch (err) {
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              throw err;
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            }
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          }
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        ).catch((err) => {
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          warn("Unhandled error in async function.", err);
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          reject(err);
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        });
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      }
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      step(gen.next(value));
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    }
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    if (typeof func !== "function") {
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      reject(new TypeError("Expected a Function."));
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    }
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    // not a generator, wrap it.
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    if (func.constructor.name !== "GeneratorFunction") {
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      gen = (function*() {
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        return func.call(self, ...args);
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      }());
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    } else {
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      gen = func.call(self, ...args);
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    }
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    try {
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      step(gen.next());
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    } catch (err) {
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      warn("The generator threw immediately.", err);
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      reject(err);
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    }
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  });
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};

5
function isAsyncAwait(value) {
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  if (value && typeof value === 'object') {
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    return value.asyncAwait &&
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    typeof value.asyncAwait.then === 'function';
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  }
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  return false;
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}

122
AwaitExpression: function Function(path, state) {
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    requiresTranspilation = true;
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},