null 180 object 90 javascript 67 typescript 61 array 59 check 44 string 43 type 42 boolean 38 empty 38 number 35 is 35 defined 27 function 27 optional 26 utility 25 value 24 nodejs 22 error 18 node 18 validation 18 validate 18 util 18 typeof 17 clean 17 property 17 option 16 throw 16 filter 14 json 14 utils 13 assert 13 symbol 13 deep 12 primitive 12 test 12 maybe 12 void 11 nil 11 false 11 properties 11 date 11 safe 11 nullable 11 utilities 11 valid 10 nullish 10 NaN 10 js 10 result 10 plugin 10 recursive 10 proxy 10 functional 9 falsy 9 window 9 remove 9 default 9 monad 9 not 8 arguments 8 regexp 8 nested 8 set 8 react 8 isnull 8 objects 8 isundefined 7 convert 7 compare 7 exception 7 variable 7 validator 7 map 7 isomorphic 7 get 7 true 7 guard 7 nan 7 truthy 7 getters 7 integer 7 es6 7 assertion 7 rust 7 undefined-behavior 6 functional-programming 6 try-catch 6 types 6 omit 6 verify 6 module 6 parse 6 rust like 5 class 5 library 5 npm 5 babel 5 type-checking 5 strip 5