☰

vanilla-lib

Vanilla JS library

当前为 2018-06-11 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/369430/604938/vanilla-lib.js 

  1. /* vanilla-lib */
  2. var  mapFlat = ( array,func ) => array.map( x => func(x) ).reduce( (a,b) => a.concat(b) ),
  3.      parent  = elem => ( ! elem ? null : elem.parentNode ),
  4.      isarr   = expr => ( 'object' === typeof expr && Array === expr.constructor ),
  5.      isfn    = expr => ( 'function' === typeof expr ),
  6.      test    = ( expr,func,other ) => ( !! expr ? func(expr) : isfn(other) ? other(expr) : other ),
  7.      log     = console.debug,
  8.      on      = ( elem,event,func ) => elem.addEventListener(event, func),
  9.      $$      = ( sel,elem ) => Array.slice((elem || document).querySelectorAll(sel)),
  10.      $       = ( sel,elem ) => (elem || document).querySelector(sel);
  11.  
  12. //Array.prototype.mapFlat = function( func ) { return  mapFlat(this, func); };
  13.  
  14. function  attr( elem, name, value ) {
  15. 	if ( isarr(elem) ) {
  16. 		return  elem.map( el => attr(el, name, value) );
  17. 	}
  18.  
  19. 	if ( null === value ) {
  20. 		elem.removeAttribute(name);
  21. 	} else {
  22. 		elem.setAttribute(name, value);
  23. 	}
  24. 	return  elem;
  25. }
  26.  
  27. function  create( html, containerType ) {
  28. 	let  container = null,
  29. 	     result    = null;
  30. 	containerType = containerType || 'div';
  31. 	create[ containerType ] = 
  32. 	container               = create[ containerType ] || document.createElement(containerType);
  33. 	container.innerHTML = html;
  34. 	result = Array.slice(container.childNodes)
  35. 	         	.map( elem => (elem.remove(), elem) );
  36. 	if ( 1 == result.length ) {
  37. 		result = result[ 0 ];
  38. 	}
  39. 	return  result;
  40. }
  41.  
  42. function  traverse( elem, up, sideways, elementsOnly, lastIfNull ) {
  43. 	let  last = elem;
  44. 	while ( !! elem && up -- > 0 )  elem = (last = elem, parent(elem));
  45.  
  46. 	let  prop = ( elementsOnly ? 'Element' : '' ) +'Sibling';
  47. 	if ( sideways < 0 ) {
  48. 		while ( !! elem && sideways ++ < 0 )  elem = (last = elem, elem[ 'previous'+ prop ]);
  49. 	} else if ( sideways > 0 ) {
  50. 		while ( !! elem && sideways -- > 0 )  elem = (last = elem, elem[ 'next'+ prop ]);
  51. 	}
  52.  
  53. 	return  ( ! lastIfNull ? elem : elem || last );
  54. }