attr.js 3.2 KB

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  1. define( [
  2. "../core",
  3. "../core/access",
  4. "./support",
  5. "../var/rnotwhite",
  6. "../selector"
  7. ], function( jQuery, access, support, rnotwhite ) {
  8. var boolHook,
  9. attrHandle = jQuery.expr.attrHandle;
  10. jQuery.fn.extend( {
  11. attr: function( name, value ) {
  12. return access( this, jQuery.attr, name, value, arguments.length > 1 );
  13. },
  14. removeAttr: function( name ) {
  15. return this.each( function() {
  16. jQuery.removeAttr( this, name );
  17. } );
  18. }
  19. } );
  20. jQuery.extend( {
  21. attr: function( elem, name, value ) {
  22. var ret, hooks,
  23. nType = elem.nodeType;
  24. // Don't get/set attributes on text, comment and attribute nodes
  25. if ( nType === 3 || nType === 8 || nType === 2 ) {
  26. return;
  27. }
  28. // Fallback to prop when attributes are not supported
  29. if ( typeof elem.getAttribute === "undefined" ) {
  30. return jQuery.prop( elem, name, value );
  31. }
  32. // All attributes are lowercase
  33. // Grab necessary hook if one is defined
  34. if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
  35. name = name.toLowerCase();
  36. hooks = jQuery.attrHooks[ name ] ||
  37. ( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );
  38. }
  39. if ( value !== undefined ) {
  40. if ( value === null ) {
  41. jQuery.removeAttr( elem, name );
  42. return;
  43. }
  44. if ( hooks && "set" in hooks &&
  45. ( ret = hooks.set( elem, value, name ) ) !== undefined ) {
  46. return ret;
  47. }
  48. elem.setAttribute( name, value + "" );
  49. return value;
  50. }
  51. if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
  52. return ret;
  53. }
  54. ret = jQuery.find.attr( elem, name );
  55. // Non-existent attributes return null, we normalize to undefined
  56. return ret == null ? undefined : ret;
  57. },
  58. attrHooks: {
  59. type: {
  60. set: function( elem, value ) {
  61. if ( !support.radioValue && value === "radio" &&
  62. jQuery.nodeName( elem, "input" ) ) {
  63. var val = elem.value;
  64. elem.setAttribute( "type", value );
  65. if ( val ) {
  66. elem.value = val;
  67. }
  68. return value;
  69. }
  70. }
  71. }
  72. },
  73. removeAttr: function( elem, value ) {
  74. var name, propName,
  75. i = 0,
  76. attrNames = value && value.match( rnotwhite );
  77. if ( attrNames && elem.nodeType === 1 ) {
  78. while ( ( name = attrNames[ i++ ] ) ) {
  79. propName = jQuery.propFix[ name ] || name;
  80. // Boolean attributes get special treatment (#10870)
  81. if ( jQuery.expr.match.bool.test( name ) ) {
  82. // Set corresponding property to false
  83. elem[ propName ] = false;
  84. }
  85. elem.removeAttribute( name );
  86. }
  87. }
  88. }
  89. } );
  90. // Hooks for boolean attributes
  91. boolHook = {
  92. set: function( elem, value, name ) {
  93. if ( value === false ) {
  94. // Remove boolean attributes when set to false
  95. jQuery.removeAttr( elem, name );
  96. } else {
  97. elem.setAttribute( name, name );
  98. }
  99. return name;
  100. }
  101. };
  102. jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
  103. var getter = attrHandle[ name ] || jQuery.find.attr;
  104. attrHandle[ name ] = function( elem, name, isXML ) {
  105. var ret, handle;
  106. if ( !isXML ) {
  107. // Avoid an infinite loop by temporarily removing this function from the getter
  108. handle = attrHandle[ name ];
  109. attrHandle[ name ] = ret;
  110. ret = getter( elem, name, isXML ) != null ?
  111. name.toLowerCase() :
  112. null;
  113. attrHandle[ name ] = handle;
  114. }
  115. return ret;
  116. };
  117. } );
  118. } );