m8/src/vars.js

m8 is a small utility library you might find useful or just plain annoying.

// if ENV === commonjs we want root to be global
	typeof global == 'undefined' ? root : ( root = global );

	var __name__  = '__name__', __type__ = '__type__', __xid__ = '__xid__',
// it's a best guess as to whether the environment we're in is a browser, commonjs platform (like nodejs) or something else completely
		AMD       = !!( typeof define == 'function' && define.amd ),
		ENV       = typeof module != 'undefined' && 'exports' in module && typeof require == 'function' ? 'commonjs' : typeof navigator != 'undefined' ? 'browser' : 'other',
		OP        = Object.prototype, UNDEF,
// this will be used by the bless method to check if a context root is a commonjs module or not.
// this way we know whether to assign the namespace been blessed to module.exports or not.
		Module    = ENV != 'commonjs' ? null : require( 'module' ),
		force     = [false, NaN, null, true, UNDEF].reduce( function( res, val ) {
			res[String( val )] = val; return res;
		}, obj() ),
		htmcol    = 'htmlcollection', htmdoc = 'htmldocument',
		id_count  = 999, id_prefix = 'anon',
// this is a Map of all the different combinations of permissions for assigning property descriptors using Object.defineProperty
		modes     = function() {
			var mode_combos = { ce : 'ec', cw : 'wc', ew : 'we', cew : 'cwe ecw ewc wce wec'.split( ' ' ) },
				prop_keys   = 'configurable enumerable writable'.split( ' ' ),
				prop_vals   = {
					c   : [true,  false, false], ce : [true,  true,  false],
					cew : [true,  true,  true],  cw : [true,  false, true],
					e   : [false, true,  false], ew : [false, true,  true],
					r   : [false, false, false], w  : [false, false, true]
				},
				modes       = Object.keys( prop_vals ).reduce( function( res, key ) {
					function assign( prop_val ) { res[prop_val] = res[key]; }

					var combo = mode_combos[key];

					res[key] = prop_keys.reduce( function( val, prop_key, i ) {
						val[prop_key] = prop_vals[key][i];
						return val;
					}, obj() );

					!combo || ( Array.isArray( combo ) ? combo.forEach( assign ) : assign( combo ) );

					return res;
				}, obj() );
			delete modes[UNDEF];
			return modes;
		}(), // pre-caching common types for faster checks
		ntypes_common = 'Array Boolean Date Function Number Object RegExp String Null Undefined'.split( ' ' ),
		ntype_cache   = ntypes_common.reduce( function( cache, type ) {
			cache['[object ' + type + ']'] = type.toLowerCase();
			return cache;
		}, obj() ),
		randy         = Math.random, re_global = /global|window/i,
		re_gsub       =  /\$?\{([^\}'"]+)\}/g,            re_guid   = /[xy]/g,     re_lib    = new RegExp( '^\\u005E?' + Name ),
		re_name       = /[\s\(]*function([^\(]+).*/,      //re_vendor = /^[Ww]ebkit|[Mm]oz|O|[Mm]s|[Kk]html(.*)$/,
/** opera has been purposefully left out for the following reasons:
  * whose stupid decision was it to make dragonfly not work unless you have an internet connection!?
  * the previous point is so seriously retarded it needs to be mentioned again, here.
  * the opera prefix `O` screws with [object Object] I don't like it, so it's gonski...
**/
		re_tostr      = /^\[object (?:[Ww]eb[Kk]it|[Mm]oz|[Mm]s|[Kk]html){0,1}([^\]]+)\]$/,
		slice         = Array.prototype.slice,            tpl_guid  = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx',
		xcache        = ntypes_common.slice( 0, -2 ).reduce( function( cache, type ) {
			cache[type] = [];
			return cache;
		}, obj() );