typeof 65 type 53 check 38 is 32 utility 31 javascript 30 validate 30 types 29 validation 28 object 27 class 26 util 25 assert 24 assertion 21 typescript 21 instance 21 checking 20 test 18 nodejs 14 prototype 14 stdlib 13 utils 13 static 13 verify 13 kind 12 node 12 this 11 inheritance 11 isArray 11 constructor 11 compare 10 error 10 interface 10 guard 9 primitive 9 predicate 9 super 9 js 9 type-checking 8 guards 8 catch 8 parent 8 predicates 8 function 8 npm-package 8 utilities 7 eslintplugin 7 inherit 7 implements 7 eslint 7 block 7 scope 7 rest 7 spread 7 ignore 7 native 7 testing 7 new 7 null 6 functional 6 ecmascript 6 throw 6 lodash 6 boolean 6 browser 6 abstract 6 try 6 ES6 6 type-check 6 valid 6 name 6 oop 6 extends 6 inherits 6 cli 6 select 5 value 5 shim 5 symbol 5 ES5 5 extend 5 array 5 tested 5 npm 5 simple 5 form 5 assign 5 private 5 is-number 5 String 5 async 5 public 5 isPrototypeOf 5 switch 5 enum 5 package 5 node-js 5 mixin 5 validator 5 ljharb 4