Async js bootstrap template

The bootstrap template to resolve dependencies of an js app before its invocation while that app along w/ dependencies are loaded asynchronously

This working concept implements the solution to avoid the niggling trouble of asynchronous loading in browser when an app itself are loaded & invoked faster than the whole bunch of its dependencies

The bootstrap is not limited to modern browsers & can be safely utilized w/ legacies (IE9 & above are in, IE8 & below require additional polyfill)

The template

'use strict'

;(function (global, factory) {
    ;(function bootstrap () {
        return [].every(function (dependency) {
            var context = global
            var proppath = dependency.split('.')
            
            while (proppath.length) {
                context = context[proppath.shift()]
                if (!/[fo]/.test((typeof context)[0])) {
                    return false
                }
            }
            
            return true
        }) ? factory() : setTimeout(bootstrap, 100)
    })()
})(this, function () {})

Once more, this time w/ comments

'use strict'

/**
 * The outer frame of the whole thing
 *
 * @param {object}   global  The global namespace (i.e. “window” / “self”)
 * @param {function} factory An app
 *
 * @returns {void}
 */
;(function (global, factory) {
    /**
     * Resolves dependencies of an app. Invokes that app as soon as 
     * all dependencies are resolved
     *
     * @returns { … } Invoked app if its dependencies are completely
     *                resolved, itself deferred for 0.1s otherwise
     */
    ;(function bootstrap () {
        return [
            /**
             * The array of strings
             *
             * Each string defines a dependency to be resolved
             * (like “_”, “FormValidation.Framework.Bootstrap”,
             * “jQuery.fn.modal” etc)
             *
             * Dependencies gotta be defined by their complete
             * namespace relative to the global one. The order
             * of dependencies within the array doesn't matter
             */
        ].every(function (dependency) {
            var context = global
            var proppath = dependency.split('.')

            while (proppath.length) {
                context = context[proppath.shift()]
                if (!/[fo]/.test((typeof context)[0])) {
                    return false
                }
            }

            return true
        }) ? factory() : setTimeout(bootstrap, 100)
    })()
})(this, function () {
    /**
     * An app code goes here
     */
})

Samples

The sample below resolves 4 dependencies

• Lodash utility library
• jQuery library
• jQuery plugin Lazy
• FastClick polyfill

'use strict'

;(function (global, factory) {
    ;(function bootstrap () {
        return [
            '_',
            'jQuery',
            'jQuery.fn.lazy',
            'FastClick'
        ].every(function (dependency) {
            var context = global
            var proppath = dependency.split('.')
            
            while (proppath.length) {
                context = context[proppath.shift()]
                if (!/[fo]/.test((typeof context)[0])) {
                    return false
                }
            }
            
            return true
        }) ? factory() : setTimeout(bootstrap, 100)
    })()
})(this, function () {
    /**
     * An app code goes here
     */
})

The next sample resolves the dependency & then passes its instance to an app on invocation

'use strict'

;(function (global, factory) {
    ;(function bootstrap () {
        return ['jQuery'].every(function (dependency) {
            var context = global
            var proppath = dependency.split('.')
            
            while (proppath.length) {
                context = context[proppath.shift()]
                if (!/[fo]/.test((typeof context)[0])) {
                    return false
                }
            }
            
            return true
        }) ? factory(jQuery) : setTimeout(bootstrap, 100)
    })()
})(this, function ($) {
    $(function () {
        /**
          * An app code goes here
          */
    })
})

Bugs

If you have faced some bug, please follow this link to create the issue & thanks for your time & contribution in advance!

Glory to Ukraine! 🇺🇦

Juliy V. Chirkov, twitter.com/juliychirkov