Core Tools

Core Tools.markdown

Core Tools

A Pen by Sven Neumann on CodePen.

License.

script.js

function require(urls) {
	if(!(urls instanceof Array)) urls = [urls];
	return Promise.all(urls.map(function(url) {
		return fetch(url)
			.then(function (response) {
				return response.text();
			})
			.then(function(scriptText) {
			var _module = {exports: {}};
			eval('(function (module, exports) { ' + scriptText + '\n//*/\n})(_module, _module.exports);\n//@ sourceURL=' + url);
			return _module.exports;
		});
	}));
}

function imgToPromise(img) {
	return new Promise(function(resolve, reject) {
		if(img.complete) return resolve(img);
    img.onload = function() {
      resolve(img);
    };
    img.onerror = function() {
      reject(new Error('Error loading image: '+img.src));
    };
	});
};

function promiseSer(tasks, f) {
	return tasks.reduce(function(p, task, idx) {
		return p.then(function() {
			f(task, idx);
		});
	}, Promise.resolve());
}

function promisePar(tasks, f) {
	return Promise.all(tasks.map(function(task, idx) {
		return f(task, idx);
	}));
}

scripts

<script src="http://rawgit.com/github/fetch/master/fetch.js"></script>