tools/side_chain_tool/web/node_modules/jquery/src/core/init.js

   1 // Initialize a jQuery object
   2 define( [
   3         "../core",
   4         "../var/document",
   5         "../var/isFunction",
   6         "./var/rsingleTag",
   7
   8         "../traversing/findFilter"
   9 ], function( jQuery, document, isFunction, rsingleTag ) {
  10
  11 "use strict";
  12
  13 // A central reference to the root jQuery(document)
  14 var rootjQuery,
  15
  16         // A simple way to check for HTML strings
  17         // Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
  18         // Strict HTML recognition (#11290: must start with <)
  19         // Shortcut simple #id case for speed
  20         rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,
  21
  22         init = jQuery.fn.init = function( selector, context, root ) {
  23                 var match, elem;
  24
  25                 // HANDLE: $(""), $(null), $(undefined), $(false)
  26                 if ( !selector ) {
  27                         return this;
  28                 }
  29
  30                 // Method init() accepts an alternate rootjQuery
  31                 // so migrate can support jQuery.sub (gh-2101)
  32                 root = root || rootjQuery;
  33
  34                 // Handle HTML strings
  35                 if ( typeof selector === "string" ) {
  36                         if ( selector[ 0 ] === "<" &&
  37                                 selector[ selector.length - 1 ] === ">" &&
  38                                 selector.length >= 3 ) {
  39
  40                                 // Assume that strings that start and end with <> are HTML and skip the regex check
  41                                 match = [ null, selector, null ];
  42
  43                         } else {
  44                                 match = rquickExpr.exec( selector );
  45                         }
  46
  47                         // Match html or make sure no context is specified for #id
  48                         if ( match && ( match[ 1 ] || !context ) ) {
  49
  50                                 // HANDLE: $(html) -> $(array)
  51                                 if ( match[ 1 ] ) {
  52                                         context = context instanceof jQuery ? context[ 0 ] : context;
  53
  54                                         // Option to run scripts is true for back-compat
  55                                         // Intentionally let the error be thrown if parseHTML is not present
  56                                         jQuery.merge( this, jQuery.parseHTML(
  57                                                 match[ 1 ],
  58                                                 context && context.nodeType ? context.ownerDocument || context : document,
  59                                                 true
  60                                         ) );
  61
  62                                         // HANDLE: $(html, props)
  63                                         if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
  64                                                 for ( match in context ) {
  65
  66                                                         // Properties of context are called as methods if possible
  67                                                         if ( isFunction( this[ match ] ) ) {
  68                                                                 this[ match ]( context[ match ] );
  69
  70                                                         // ...and otherwise set as attributes
  71                                                         } else {
  72                                                                 this.attr( match, context[ match ] );
  73                                                         }
  74                                                 }
  75                                         }
  76
  77                                         return this;
  78
  79                                 // HANDLE: $(#id)
  80                                 } else {
  81                                         elem = document.getElementById( match[ 2 ] );
  82
  83                                         if ( elem ) {
  84
  85                                                 // Inject the element directly into the jQuery object
  86                                                 this[ 0 ] = elem;
  87                                                 this.length = 1;
  88                                         }
  89                                         return this;
  90                                 }
  91
  92                         // HANDLE: $(expr, $(...))
  93                         } else if ( !context || context.jquery ) {
  94                                 return ( context || root ).find( selector );
  95
  96                         // HANDLE: $(expr, context)
  97                         // (which is just equivalent to: $(context).find(expr)
  98                         } else {
  99                                 return this.constructor( context ).find( selector );
 100                         }
 101
 102                 // HANDLE: $(DOMElement)
 103                 } else if ( selector.nodeType ) {
 104                         this[ 0 ] = selector;
 105                         this.length = 1;
 106                         return this;
 107
 108                 // HANDLE: $(function)
 109                 // Shortcut for document ready
 110                 } else if ( isFunction( selector ) ) {
 111                         return root.ready !== undefined ?
 112                                 root.ready( selector ) :
 113
 114                                 // Execute immediately if ready is not present
 115                                 selector( jQuery );
 116                 }
 117
 118                 return jQuery.makeArray( selector, this );
 119         };
 120
 121 // Give the init function the jQuery prototype for later instantiation
 122 init.prototype = jQuery.fn;
 123
 124 // Initialize central reference
 125 rootjQuery = jQuery( document );
 126
 127 return init;
 128
 129 } );