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vanilla-lib

Vanilla JS library

当前为 2018-06-15 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/369430/605965/vanilla-lib.js 

  1. function VanillaLib( ) {
  2. 	let  self = Object.create({});
  3.  
  4. 	self.mapFlat = ( array,func ) => array.map( x => func(x) ).reduce( (a,b) => a.concat(b) );
  5. 	self.parenth = ( elem,nth ) => traverse(elem, self.ifndef(nth, 1), 0);
  6. 	self.ifndef  = ( expr,value ) => ( self.ndef(expr) ? value : expr );
  7. 	self.ispojo  = expr => self.isobj(expr, Object);
  8. 	self.export  = ( source,target,members ) => ( Object.keys(source).filter( key => ! members || members.includes(key) )
  9. 	                                                                 .forEach( key => target[ key ] = source[ key ] ) );
  10. 	self.ifnan   = ( expr,value ) => ( isNaN(expr) ? value : expr );
  11. 	self.isobj   = ( expr,type ) => ( 'object' === typeof expr && ( ! type || self.isfn(expr.constructor)
  12. 	                                      && type === ( self.isfn(type) ? expr.constructor : expr.constructor.name ) ) );
  13. 	self.isarr   = expr => self.isobj(expr, Array);
  14. 	self.isstr   = expr => ( 'string' === typeof expr );
  15. 	self.isfn    = expr => ( 'function' === typeof expr );
  16. 	self.ndef    = expr => ( 'undefined' === typeof expr );
  17. 	self.test    = ( expr,func,other ) => ( !! expr ? func(expr) : self.isfn(other) ? other(expr) : other );
  18. 	self.fire    = ( elem,event,args ) => elem.dispatchEvent( self.isobj(event) ? even
  19. 	                                     : new Event( event, self.ifndef(args, { 'bubbles':true, 'cancelable':true }) ) );
  20. 	self.warn    = console.warn;
  21. 	self.log     = console.debug;
  22. 	self.on      = ( elem,event,func ) => elem.addEventListener(event, func);
  23. 	self.$$      = ( sel,elem ) => Array.slice((elem || document).querySelectorAll(sel));
  24. 	self.$       = ( sel,elem ) => (elem || document).querySelector(sel);
  25.  
  26. 	self.aggRate = ( amount,rate,periods ) => ( ! periods ? amount : self.aggRate(amount * rate, rate, periods - 1) ),
  27. 	self.toDec   = expr => ( Math.round(parseFloat((expr +'').replace(/\$|,/g, '')) * 100) / 100 );
  28.  
  29.  
  30. 	self.appendTo = function( element, parent, reference ) {
  31. 		if ( !! reference ) {
  32. 			parent    = reference.parentNode;
  33. 			reference = reference.nextSibling;
  34. 		}
  35.  
  36. 		if ( !! reference ) {
  37. 			return  self.prependTo(element, parent, reference);
  38. 		} else  if ( !! parent ) {
  39. 			parent.append(element);
  40. 		} else {
  41. 			self.warn('*** appendTo() could not add element: No parent or reference element provided');
  42. 		}
  43.  
  44. 		return  element;
  45. 	};
  46.  
  47. 	self.attr = function( elem, name, value ) {
  48. 		if ( self.isarr(elem) ) {
  49. 			return  elem.map( el => self.attr(el, name, value) );
  50. 		}
  51.  
  52. 		self.keysAndValues(name, value, ( n,v ) => ( null === v ? elem.removeAttribute(n) : elem.setAttribute(n, v) ) );
  53. 		return  elem;
  54. 	};
  55.  
  56. 	self.create = function( html, containerType ) {
  57. 		let  container = null,
  58. 		     result    = null,
  59. 		     attrs, style;
  60.  
  61. 		if ( self.isobj(containerType) ) {
  62. 			attrs         = containerType.attrs;
  63. 			style         = containerType.style;
  64. 			containerType = containerType.container;
  65. 		}
  66.  
  67. 		containerType = containerType || 'div';
  68. 		create[ containerType ] =
  69. 		container               = create[ containerType ] || document.createElement(containerType);
  70. 		container.innerHTML = html;
  71. 		result = Array.slice(container.childNodes)
  72. 		         	.map( elem => (elem.remove(), elem) );
  73.  
  74. 		if ( !! attrs ) {
  75. 			self.attr(result, attrs);
  76. 		}
  77. 		if ( !! style ) {
  78. 			self.css(result, style);
  79. 		}
  80.  
  81. 		if ( 1 == result.length ) {
  82. 			result = result[ 0 ];
  83. 		}
  84. 		return  result;
  85. 	};
  86.  
  87. 	self.css = function( element, key, value ) {
  88. 		if ( isarr(element) ) {
  89. 			return  element.map( el => css(el, key, value) );
  90. 		}
  91.  
  92. 		keysAndValues(key, value, ( k,v ) => element.style[ k ] = v );
  93. 		return  element;
  94. 	};
  95.  
  96. 	self.keysAndValues = function( key, value, action ) {
  97. 		// Case 1: key is an object (and there is no value)
  98. 		if ( self.isobj(key) && ! value ) {
  99. 			return  Object.keys(key)
  100. 			        	.map( k => action(k, key[ k ]) );
  101. 		// Case 2: key is an array
  102. 		} else if ( self.isarr(key) ) {
  103. 			// Case 1.a: value is an array of the same length
  104. 			if ( self.isarr(value) && key.length === value.length ) {
  105. 				return  key.map( ( k,i ) => action(k, value[ i ]) );
  106. 			// Case 1.b: value is considered a simple, plain value
  107. 			} else {
  108. 				return  key.map( k => action(k, value) );
  109. 			}
  110. 		// Default Case: key and value considered as simple, plain values
  111. 		} else {
  112. 			return  action(key, value);
  113. 		}
  114. 	};
  115.  
  116. 	self.prependTo = function( element, parent, reference ) {
  117. 		if ( ! reference && !! parent ) {
  118. 			reference = parent.childNodes[ 0 ];
  119. 		}
  120.  
  121. 		if ( !! reference ) {
  122. 			reference.parentNode.insertBefore(element, reference);
  123. 		} else if ( !! parent ) {
  124. 			parent.append(element);
  125. 		} else {
  126. 			self.warn('*** prependTo() could not add element: No parent or reference element provided');
  127. 		}
  128.  
  129. 		return  element;
  130. 	};
  131.  
  132. 	self.toDec2 = function( amount ) {
  133. 		amount = self.toDec(amount);
  134. 		if ( isNaN(amount) ) {
  135. 			return  null;
  136. 		}
  137. 		let  segs = (amount +'').split('.');
  138. 		return  segs[ 0 ] +'.'+ ((segs[ 1 ] || 0) +'0').slice(0, 2);
  139. 	};
  140.  
  141. 	self.toMoney = function( amount ) {
  142. 		let  dec2 = self.toDec2(amount);
  143. 		return  ( isNaN(dec2) ? null : dec2 < 0 ? '-$ '+ (-dec2) : '$ '+ dec2 );
  144. 	};
  145.  
  146. 	self.traverse = function( elem, up, sideways, elementsOnly, lastIfNull ) {
  147. 		let  last = elem;
  148. 		while ( !! elem && up -- > 0 )  elem = (last = elem, elem.parentNode);
  149.  
  150. 		let  prop = ( elementsOnly ? 'Element' : '' ) +'Sibling';
  151. 		if ( sideways < 0 ) {
  152. 			while ( !! elem && sideways ++ < 0 )  elem = (last = elem, elem[ 'previous'+ prop ]);
  153. 		} else if ( sideways > 0 ) {
  154. 			while ( !! elem && sideways -- > 0 )  elem = (last = elem, elem[ 'next'+ prop ]);
  155. 		}
  156.  
  157. 		return  ( ! lastIfNull ? elem : elem || last );
  158. 	};
  159.  
  160.  
  161. 	self.copyMembers = function( source, target, members, preserve ) {
  162. 		//self.log('* Copying from', source, '\n\tto', target, '\n\t'+ members, preserve);
  163. 		if ( ! self.isobj(source) || ! self.isobj(target) ) {
  164. 			self.warn('=> Cannot copy from/to non-objects');
  165. 			return  false;
  166. 		}
  167.  
  168. 		let  names = Object.keys(source);
  169. 		preserve = ( self.isobj(preserve) ? preserve : false );
  170. 		//self.log('- Full list of members:', names);
  171.  
  172. 		if ( self.isstr(members) ) {
  173. 			members = members.split(',').map( nm => nm.trim() );
  174. 		}
  175. 		if ( self.isarr(members) ) {
  176. 			//self.log('* Member filter:', members);
  177. 			names = names.filter( nm => members.includes(nm) );
  178. 		} else if ( self.isfn(members) ) {
  179. 			names = names.filter(members);
  180. 		}
  181. 		//self.log('- Filtered list of members:', names);
  182.  
  183. 		names.forEach( nm => {
  184. 			if ( !! target[ nm ] && !! preserve ) {
  185. 				preserve[ nm ] = target[ nm ];
  186. 			}
  187. 			target[ nm ] = source[ nm ];
  188. 			//self.log('- Target members', nm, target[ nm ]);
  189. 		} );
  190. 		//self.log('=>', target);
  191. 		return  (preserve || target);
  192. 	};
  193.  
  194. 	self.export = function( scope, members, overwriten ) {
  195. 		if ( ! scope ) {
  196. 			return  false;
  197. 		}
  198. 		return  self.copyMembers(this, scope, members, overwriten);
  199. 	};
  200.  
  201. 	// Avoid needing a 'new' operator; this is just a wrapper
  202. 	return  self;
  203. }