3 examples of 'node async waterfall example' in JavaScript

143
function onAfterAwait(node) {
144
  insertText(node.range[1], node.range[1], ')');
145
}

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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};

69
runChildNode(node) {
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  this.currentNode = node;
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  this.currentNode.started = true;
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  Logger.log(`\n ${Logger.colors.green('→')} Running command: ${Logger.colors.light_green(node.fullName)} (${AsyncTree.printArguments(node)})`);
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74
  return node.run()
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    .then(result => {
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      let abortOnFailure = false;
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      if (result instanceof Error) {
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        node.reject(result);
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        abortOnFailure = result.abortOnFailure || Utils.isUndefined(result.abortOnFailure);
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      } else {
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        node.resolve(result);
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      }
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      Logger.log(` ${Logger.colors.green('→')} Completed command: ${Logger.colors.light_green(node.fullName)}` +
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        ` (${AsyncTree.printArguments(node)}) (${node.elapsedTime}ms)`);
87
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      if (abortOnFailure) {
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        return this.done(result);
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      }
91
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      return this.traverse();
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    });
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}