jQuery框架源码解读

parseJSON: function( data ) {
// Attempt to parse using the native JSON parser first
if ( window.JSON && window.JSON.parse ) {
return window.JSON.parse( data );
} if ( data === null ) {
return data;
} if ( typeof data === "string" ) { // Make sure leading/trailing whitespace is removed (IE can't handle it)
data = jQuery.trim( data ); if ( data ) {
// Make sure the incoming data is actual JSON
// Logic borrowed from http://json.org/json2.js
if ( rvalidchars.test( data.replace( rvalidescape, "@" )
.replace( rvalidtokens, "]" )
.replace( rvalidbraces, "")) ) { return ( new Function( "return " + data ) )();
}
}
} jQuery.error( "Invalid JSON: " + data );
},