小记jQuery扩展 》初始化，流程
[javascript]
// Define a local copy of jQuery
var jQuery = $ = function( selector, context ) {
// The jQuery object is actually just the init constructor 'enhanced'
return new jQuery.fn.init( selector, context );
}
jQuery.fn = jQuery.prototype = {
init: function(selector, context){}
};
// Give the init function the jQuery prototype for later instantiation
jQuery.fn.init.prototype = jQuery.fn;
jQuery.extend = jQuery.fn.extend = function() {
// copy reference to target object
var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options, name, src, copy;
// Handle a deep copy situation
if ( typeof target === "boolean" ) {
deep = target;
target = arguments[1] || {};
// skip the boolean and the target
i = 2;
}
// Handle case when target is a string or something (possible in deep copy)
if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
target = {};
}
// extend jQuery itself if only one argument is passed
if ( length === i ) {
target = this;
--i;
}
for ( ; i < length; i++ ) {
// Only deal with non-null/undefined values
if ( (options = arguments[ i ]) != null ) {
// Extend the base object
for ( name in options ) {
src = target[ name ];
copy = options[ name ];
// Prevent never-ending loop
if ( target === copy ) {
continue;
}
// Recurse if we're merging object literal values or arrays
if ( deep && copy && ( jQuery.isPlainObject(copy) || jQuery.isArray(copy) ) ) {
var clone = src && ( jQuery.isPlainObject(src) || jQuery.isArray(src) ) ? src
: jQuery.isArray(copy) ? [] : {};
// Never move original objects, clone them
target[ name ] = jQuery.extend( deep, clone, copy );
// Don't bring in undefined values
} else if ( copy !== undefined ) {
target[ name ] = copy;
}
}
}
}
// Return the modified object
return target;
};
//-------------------------------------------------------------------------------
//原始扩展方法是放在沙箱中处理的，这样保证每个实例对象都可以调用到原始扩展方法
jQuery.fn.extend({
fuckjQuery_fn: function( key ) {
return this.each(function() {
jQuery.removeData( this, key );
});
}
});
jQuery.extend({
fuckjQuery: function( key ) {
return this.each(function() {
jQuery.removeData( this, key );
});
}
});
//-------------------------------------------------------------------------------
console.dir($)
console.log('---------------华丽丽的分隔线---------------');
console.dir($())
[/javascript]
//自绘草图一张
