How to Deep clone in javascript

Question

How do you deep clone a JavaScript object?

I know there are various functions based on frameworks like JSON.parse(JSON.stringify(o)) and $.extend(t

Answer 1

I noticed that Map should require special treatment, thus with all suggestions in this thread, code will be:

function deepClone( obj ) {
    if( !obj || true == obj ) //this also handles boolean as true and false
        return obj;
    var objType = typeof( obj );
    if( "number" == objType || "string" == objType ) // add your immutables here
        return obj;
    var result = Array.isArray( obj ) ? [] : !obj.constructor ? {} : new obj.constructor();
    if( obj instanceof Map )
        for( var key of obj.keys() )
            result.set( key, deepClone( obj.get( key ) ) );
    for( var key in obj )
        if( obj.hasOwnProperty( key ) )
            result[key] = deepClone( obj[ key ] );
    return result;
}