日期:2014-05-16 浏览次数:20388 次
jQuery.extend = jQuery.fn.extend = function () {
// copy reference to target object
var target = arguments[0],
a = 1;
// extend jQuery itself if only one argument is passed
if (arguments.length == 1) {
target = this;
a = 0;
}
var prop;
while (prop = arguments[a++])
// Extend the base object
for (var i in prop) target[i] = prop[i];
// Return the modified object
return target;
};
jQuery.extend = jQuery.fn.extend = function() {
var options, name, src, copy, copyIsArray, clone,
target = arguments[0]
------解决方案--------------------
{},
i = 1,
length = arguments.length,
deep = false;
// Handle a deep copy situation
if ( typeof target === "boolean" ) {
deep = target;
target = arguments[1]
------解决方案--------------------
{};
// 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 plain objects or arrays
if ( deep && copy && (