Convert R code to javascript

General information for the business: Data work
Description of requirements/functionality: This side has R code for analyzing a survey:
https://github.com/ajdamico/asdfree/blob/master/Youth%20Risk%20Behavior%20Surveillance%20System/replicate%20cdc%20software%20for%20analysis%20of%20yrbs%20data%20publication.R#L73-L91

You can look in the attached file for the R source code for the survey package. You'll see it's the svymean and s
I need the relevant pieces converted to pure javascript. Or offer a bounty if someone finds it out there. :)

Specifically, I need the below R code replaced with JavaScript (see the link above):
library(survey) # load survey package (analyzes complex design surveys)
#################################################
68 # survey design for taylor-series linearization #
69 #################################################
70

71 # create taylor-series linearization survey design object
72 # with YRBSS design information using the data frame `x`
73 y <-
74 svydesign(
75 ~psu ,
76 strata = ~stratum ,
77 data = x ,
78 weights = ~weight ,
79 nest = TRUE
80 )
81

82

83 # the above complex sample survey design object `y` can be used to
84 # precisely replicate SUDAAN's coefficients and standard errors
85

86 # for each of the three survey questions, both print the results of
87 # the `svymean` call to the screen - by encapsulating the statement in ( )
88 # and also save it into some separate object that can be queried later
89 ( helmet <- svymean( ~as.numeric( qn8 == 1 ) , y , na.rm = TRUE ) )

This outputs:
mean SE
as.numeric(qn8 == 1) 0.87873 0.0129

Which matches the valid output that you can see here:
https://nccd.cdc.gov/youthonline/App/Results.aspx?TT=B&OUT=0&SID=HS&QID=H8&LID=LL&YID=2013&LID2=&YID2=&COL=S&ROW1=N&ROW2=N&HT=QQ&LCT=LL&FS=S1&FR=R1&FG=G1&FSL=S1&FRL=R1&FGL=G1&PV=&TST=False&C1=&C2=&QP=G&DP=2&VA=St&CS=Y&SYID=&EYID=&SC=DEFAULT&SO=ASC

You can use the methods and getAnywhere R functions to see the R source. (open source)

I will retain all rights to the code (which I will eventually open source).

I need this within a few days. Around July 13th.
Extra notes:

I attached the R source code for the survey package. It's the svymean and svydesign functions, as well as called functions and data structures, that need to be ported to pure javascript. Bonus if you can get this done this weekend.