requirebin sketch

index.js

// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
var co = require('co');

console.log = function() {
  var text = '<div>' + Date.now() + '   ' +  [].slice.call(arguments).join(' ') + '</div>';
  document.body.innerHTML += text;
}

function wait(ms) {
  return new Promise(resolve => setTimeout(function(){resolve(ms)}, ms));
}

// https://unpkg.com/tslib@1.7.1/tslib.js
var __awaiter = function(thisArg, _arguments, P, generator) {
  return new Promise(function(resolve, reject) {
    console.log('__awaiter start to new promise');
    function fulfilled(value) {
      console.log('__awaiter innter promise resolve', value);
      try {
        step(generator.next(value));
      } catch (e) {
        reject(e);
      }
    }
    function rejected(value) {
      console.log('__awaiter innter promise reject', value);
      try {
        step(generator["throw"](value));
      } catch (e) {
        reject(e);
      }
    }
    function step(result) {
      console.log('__awaiter step', result.value, result.done);
      result.done
        ? resolve(result.value)
        : new Promise(function(_resolve) {
            console.log('__awaiter innter promise resolve', result.value)
            _resolve(result.value);
          }).then(fulfilled, rejected);
    }
    step((generator = generator.apply(thisArg, _arguments || [])).next());
  });
};


// typescript will compile below async function to generator wrappered by tslib __awaiter
// async function service () {
//   return 'foo';
// }

var service = function() {
  return __awaiter(this, void 0, void 0, function*() {
    console.log('start running service');
    const ret = yield wait(300);
    console.log('end running service');
    return ret;
  });
};

var test = function*() {
  console.log("start running test");
  var ret = yield service();
  console.log("end running test", ret);
};

console.log('---------- Use co to run test --------------');
co(test).then(function() {
  console.log( '\n\n');

  console.log('---------- run test by hand --------------');
  var run = test();
  var step1 = run.next();
  step1.value.then(function(data) {
    var step2 = run.next(data);
  });
});

minified.js

setTimeout(function(){
;require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"co":[function(require,module,exports){

/**
 * slice() reference.
 */

var slice = Array.prototype.slice;

/**
 * Expose `co`.
 */

module.exports = co['default'] = co.co = co;

/**
 * Wrap the given generator `fn` into a
 * function that returns a promise.
 * This is a separate function so that
 * every `co()` call doesn't create a new,
 * unnecessary closure.
 *
 * @param {GeneratorFunction} fn
 * @return {Function}
 * @api public
 */

co.wrap = function (fn) {
  createPromise.__generatorFunction__ = fn;
  return createPromise;
  function createPromise() {
    return co.call(this, fn.apply(this, arguments));
  }
};

/**
 * Execute the generator function or a generator
 * and return a promise.
 *
 * @param {Function} fn
 * @return {Promise}
 * @api public
 */

function co(gen) {
  var ctx = this;
  var args = slice.call(arguments, 1)

  // we wrap everything in a promise to avoid promise chaining,
  // which leads to memory leak errors.
  // see https://github.com/tj/co/issues/180
  return new Promise(function(resolve, reject) {
    if (typeof gen === 'function') gen = gen.apply(ctx, args);
    if (!gen || typeof gen.next !== 'function') return resolve(gen);

    onFulfilled();

    /**
     * @param {Mixed} res
     * @return {Promise}
     * @api private
     */

    function onFulfilled(res) {
      var ret;
      try {
        ret = gen.next(res);
      } catch (e) {
        return reject(e);
      }
      next(ret);
    }

    /**
     * @param {Error} err
     * @return {Promise}
     * @api private
     */

    function onRejected(err) {
      var ret;
      try {
        ret = gen.throw(err);
      } catch (e) {
        return reject(e);
      }
      next(ret);
    }

    /**
     * Get the next value in the generator,
     * return a promise.
     *
     * @param {Object} ret
     * @return {Promise}
     * @api private
     */

    function next(ret) {
      if (ret.done) return resolve(ret.value);
      var value = toPromise.call(ctx, ret.value);
      if (value && isPromise(value)) return value.then(onFulfilled, onRejected);
      return onRejected(new TypeError('You may only yield a function, promise, generator, array, or object, '
        + 'but the following object was passed: "' + String(ret.value) + '"'));
    }
  });
}

/**
 * Convert a `yield`ed value into a promise.
 *
 * @param {Mixed} obj
 * @return {Promise}
 * @api private
 */

function toPromise(obj) {
  if (!obj) return obj;
  if (isPromise(obj)) return obj;
  if (isGeneratorFunction(obj) || isGenerator(obj)) return co.call(this, obj);
  if ('function' == typeof obj) return thunkToPromise.call(this, obj);
  if (Array.isArray(obj)) return arrayToPromise.call(this, obj);
  if (isObject(obj)) return objectToPromise.call(this, obj);
  return obj;
}

/**
 * Convert a thunk to a promise.
 *
 * @param {Function}
 * @return {Promise}
 * @api private
 */

function thunkToPromise(fn) {
  var ctx = this;
  return new Promise(function (resolve, reject) {
    fn.call(ctx, function (err, res) {
      if (err) return reject(err);
      if (arguments.length > 2) res = slice.call(arguments, 1);
      resolve(res);
    });
  });
}

/**
 * Convert an array of "yieldables" to a promise.
 * Uses `Promise.all()` internally.
 *
 * @param {Array} obj
 * @return {Promise}
 * @api private
 */

function arrayToPromise(obj) {
  return Promise.all(obj.map(toPromise, this));
}

/**
 * Convert an object of "yieldables" to a promise.
 * Uses `Promise.all()` internally.
 *
 * @param {Object} obj
 * @return {Promise}
 * @api private
 */

function objectToPromise(obj){
  var results = new obj.constructor();
  var keys = Object.keys(obj);
  var promises = [];
  for (var i = 0; i < keys.length; i++) {
    var key = keys[i];
    var promise = toPromise.call(this, obj[key]);
    if (promise && isPromise(promise)) defer(promise, key);
    else results[key] = obj[key];
  }
  return Promise.all(promises).then(function () {
    return results;
  });

  function defer(promise, key) {
    // predefine the key in the result
    results[key] = undefined;
    promises.push(promise.then(function (res) {
      results[key] = res;
    }));
  }
}

/**
 * Check if `obj` is a promise.
 *
 * @param {Object} obj
 * @return {Boolean}
 * @api private
 */

function isPromise(obj) {
  return 'function' == typeof obj.then;
}

/**
 * Check if `obj` is a generator.
 *
 * @param {Mixed} obj
 * @return {Boolean}
 * @api private
 */

function isGenerator(obj) {
  return 'function' == typeof obj.next && 'function' == typeof obj.throw;
}

/**
 * Check if `obj` is a generator function.
 *
 * @param {Mixed} obj
 * @return {Boolean}
 * @api private
 */
function isGeneratorFunction(obj) {
  var constructor = obj.constructor;
  if (!constructor) return false;
  if ('GeneratorFunction' === constructor.name || 'GeneratorFunction' === constructor.displayName) return true;
  return isGenerator(constructor.prototype);
}

/**
 * Check for plain object.
 *
 * @param {Mixed} val
 * @return {Boolean}
 * @api private
 */

function isObject(val) {
  return Object == val.constructor;
}

},{}]},{},[])
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../home/admin/browserify-cdn/node_modules/browserify/node_modules/browser-pack/_prelude.js","co"],"names":[],"mappings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file":"generated.js","sourceRoot":"","sourcesContent":["(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","\n/**\n * slice() reference.\n */\n\nvar slice = Array.prototype.slice;\n\n/**\n * Expose `co`.\n */\n\nmodule.exports = co['default'] = co.co = co;\n\n/**\n * Wrap the given generator `fn` into a\n * function that returns a promise.\n * This is a separate function so that\n * every `co()` call doesn't create a new,\n * unnecessary closure.\n *\n * @param {GeneratorFunction} fn\n * @return {Function}\n * @api public\n */\n\nco.wrap = function (fn) {\n  createPromise.__generatorFunction__ = fn;\n  return createPromise;\n  function createPromise() {\n    return co.call(this, fn.apply(this, arguments));\n  }\n};\n\n/**\n * Execute the generator function or a generator\n * and return a promise.\n *\n * @param {Function} fn\n * @return {Promise}\n * @api public\n */\n\nfunction co(gen) {\n  var ctx = this;\n  var args = slice.call(arguments, 1)\n\n  // we wrap everything in a promise to avoid promise chaining,\n  // which leads to memory leak errors.\n  // see https://github.com/tj/co/issues/180\n  return new Promise(function(resolve, reject) {\n    if (typeof gen === 'function') gen = gen.apply(ctx, args);\n    if (!gen || typeof gen.next !== 'function') return resolve(gen);\n\n    onFulfilled();\n\n    /**\n     * @param {Mixed} res\n     * @return {Promise}\n     * @api private\n     */\n\n    function onFulfilled(res) {\n      var ret;\n      try {\n        ret = gen.next(res);\n      } catch (e) {\n        return reject(e);\n      }\n      next(ret);\n    }\n\n    /**\n     * @param {Error} err\n     * @return {Promise}\n     * @api private\n     */\n\n    function onRejected(err) {\n      var ret;\n      try {\n        ret = gen.throw(err);\n      } catch (e) {\n        return reject(e);\n      }\n      next(ret);\n    }\n\n    /**\n     * Get the next value in the generator,\n     * return a promise.\n     *\n     * @param {Object} ret\n     * @return {Promise}\n     * @api private\n     */\n\n    function next(ret) {\n      if (ret.done) return resolve(ret.value);\n      var value = toPromise.call(ctx, ret.value);\n      if (value && isPromise(value)) return value.then(onFulfilled, onRejected);\n      return onRejected(new TypeError('You may only yield a function, promise, generator, array, or object, '\n        + 'but the following object was passed: \"' + String(ret.value) + '\"'));\n    }\n  });\n}\n\n/**\n * Convert a `yield`ed value into a promise.\n *\n * @param {Mixed} obj\n * @return {Promise}\n * @api private\n */\n\nfunction toPromise(obj) {\n  if (!obj) return obj;\n  if (isPromise(obj)) return obj;\n  if (isGeneratorFunction(obj) || isGenerator(obj)) return co.call(this, obj);\n  if ('function' == typeof obj) return thunkToPromise.call(this, obj);\n  if (Array.isArray(obj)) return arrayToPromise.call(this, obj);\n  if (isObject(obj)) return objectToPromise.call(this, obj);\n  return obj;\n}\n\n/**\n * Convert a thunk to a promise.\n *\n * @param {Function}\n * @return {Promise}\n * @api private\n */\n\nfunction thunkToPromise(fn) {\n  var ctx = this;\n  return new Promise(function (resolve, reject) {\n    fn.call(ctx, function (err, res) {\n      if (err) return reject(err);\n      if (arguments.length > 2) res = slice.call(arguments, 1);\n      resolve(res);\n    });\n  });\n}\n\n/**\n * Convert an array of \"yieldables\" to a promise.\n * Uses `Promise.all()` internally.\n *\n * @param {Array} obj\n * @return {Promise}\n * @api private\n */\n\nfunction arrayToPromise(obj) {\n  return Promise.all(obj.map(toPromise, this));\n}\n\n/**\n * Convert an object of \"yieldables\" to a promise.\n * Uses `Promise.all()` internally.\n *\n * @param {Object} obj\n * @return {Promise}\n * @api private\n */\n\nfunction objectToPromise(obj){\n  var results = new obj.constructor();\n  var keys = Object.keys(obj);\n  var promises = [];\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    var promise = toPromise.call(this, obj[key]);\n    if (promise && isPromise(promise)) defer(promise, key);\n    else results[key] = obj[key];\n  }\n  return Promise.all(promises).then(function () {\n    return results;\n  });\n\n  function defer(promise, key) {\n    // predefine the key in the result\n    results[key] = undefined;\n    promises.push(promise.then(function (res) {\n      results[key] = res;\n    }));\n  }\n}\n\n/**\n * Check if `obj` is a promise.\n *\n * @param {Object} obj\n * @return {Boolean}\n * @api private\n */\n\nfunction isPromise(obj) {\n  return 'function' == typeof obj.then;\n}\n\n/**\n * Check if `obj` is a generator.\n *\n * @param {Mixed} obj\n * @return {Boolean}\n * @api private\n */\n\nfunction isGenerator(obj) {\n  return 'function' == typeof obj.next && 'function' == typeof obj.throw;\n}\n\n/**\n * Check if `obj` is a generator function.\n *\n * @param {Mixed} obj\n * @return {Boolean}\n * @api private\n */\nfunction isGeneratorFunction(obj) {\n  var constructor = obj.constructor;\n  if (!constructor) return false;\n  if ('GeneratorFunction' === constructor.name || 'GeneratorFunction' === constructor.displayName) return true;\n  return isGenerator(constructor.prototype);\n}\n\n/**\n * Check for plain object.\n *\n * @param {Mixed} val\n * @return {Boolean}\n * @api private\n */\n\nfunction isObject(val) {\n  return Object == val.constructor;\n}\n"]}
// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
var co = require('co');

console.log = function() {
  var text = '<div>' + Date.now() + '   ' +  [].slice.call(arguments).join(' ') + '</div>';
  document.body.innerHTML += text;
}

function wait(ms) {
  return new Promise(resolve => setTimeout(function(){resolve(ms)}, ms));
}

// https://unpkg.com/tslib@1.7.1/tslib.js
var __awaiter = function(thisArg, _arguments, P, generator) {
  return new Promise(function(resolve, reject) {
    console.log('__awaiter start to new promise');
    function fulfilled(value) {
      console.log('__awaiter innter promise resolve', value);
      try {
        step(generator.next(value));
      } catch (e) {
        reject(e);
      }
    }
    function rejected(value) {
      console.log('__awaiter innter promise reject', value);
      try {
        step(generator["throw"](value));
      } catch (e) {
        reject(e);
      }
    }
    function step(result) {
      console.log('__awaiter step', result.value, result.done);
      result.done
        ? resolve(result.value)
        : new Promise(function(_resolve) {
            console.log('__awaiter innter promise resolve', result.value)
            _resolve(result.value);
          }).then(fulfilled, rejected);
    }
    step((generator = generator.apply(thisArg, _arguments || [])).next());
  });
};


// typescript will compile below async function to generator wrappered by tslib __awaiter
// async function service () {
//   return 'foo';
// }

var service = function() {
  return __awaiter(this, void 0, void 0, function*() {
    console.log('start running service');
    const ret = yield wait(300);
    console.log('end running service');
    return ret;
  });
};

var test = function*() {
  console.log("start running test");
  var ret = yield service();
  console.log("end running test", ret);
};

console.log('---------- Use co to run test --------------');
co(test).then(function() {
  console.log( '\n\n');

  console.log('---------- run test by hand --------------');
  var run = test();
  var step1 = run.next();
  step1.value.then(function(data) {
    var step2 = run.next(data);
  });
});


;}, 0)

package.json

{
  "name": "requirebin-sketch",
  "version": "1.0.0",
  "dependencies": {
    "co": "4.6.0"
  }
}

page-body.html

<!-- contents of this file will be placed inside the <body> -->

page-head.html

<!-- contents of this file will be placed inside the <head> -->

requirebin.md

made with requirebin