Determine whether other key-value pairs in the object except Boolean values are empty?


let joke ={
    a:"1",
    b:"2",
    c:false
}
for(let key in joke){
    if(joke[key]==""){
        alert("")
    }
}

as above, in the loop check, c is a Boolean value false, judgment pops up alert, ask how to ignore the case that the key-value pair is a Boolean value, and only detect whether the string and number types are empty?

Javascript
Mar.12,2021 
for(let key in joke){
    if(joke[key] === '' && typeof joke[key] !== 'boolean'){
        alert('')
    }
}

use =
joke [key] ='
if the check value is null or undefined , you can list these conditions
joke [key] =''| joke [key] = null | | joke [key] = undefined

< hr class= "answer".

= implicit type conversion has occurred. If you change it to = , it must be ' to enter.

only detects whether the string and numeric types are empty

does not understand this sentence, do you want the number 0 to also determine a null value?

Previous: Javascript es6 super doesn't understand.

Next: How to call the mutations of another module in the action of one module by vuex in nuxt

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b33d42-34275.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b33d42-34275.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?