aryan015

Posted on Jun 18 • Updated on Jun 23

lets-have-fun-with-console-in-javascript ❤

#react #javascript #vue

console.table

const users = [
    {id:1,name:'WDE'},
    {id:2}
]
console.log(users)

output
|(index)|id|name|
|--|--|--|
|0|1|WDE|
|1|2||

estimate time complexity of a program in ms🤣

console.log('fetching')
fetch('url').then(()=>{
    //awaiting response
    console.timeEnd('fetched') //fetched:0ms
})

will display all property related to that datatype

const obj = {
    name:'aryan',
    age:26
}
console.dir(obj);

output1

Object {name:'aryan',age:21}

output2

It will display call stack in decending order. last executed to firstly executed.

function foo(){
    function boo(){
        //do something
        console.trace() // start tracing
    }
    boo();
}
// boo
// foo
// anonymous

The console.assert() static method writes an error message to the console if the assertion is false. If the assertion is true, nothing happens.

console.log(condition,error)

console.assert(0===1,'not true')

ps: i dnot know use of this🤣

function fun(x){
    console.count(x);
}
//count the number of fun runs
fun('hi')
fun('hi')
fun('hi')
fun('hi')

output

'hi': 4

console.log('pre written message')
console.clear() // hey javascript clear all prev message
console.log('new messages aryan')

output

do this
    step1:follow
    step2:like

code

console.group('do this')
console.log('setp1:follow')
console.log('setp2:like')
console.groupEnd() //reset

post-credit:@code4git