Beyond console.log()

We all have been using console.log(), but many more options are available out there.Let us see them now

The most useful type beyond log is console.table()

console.table()

• Takes in JSON or an array and prints in table format
• Very handy while visualising json objects and arrays

• Syntax:

  console.table({
  "id":"1",
  "key":"value",
  "count":2
  });
  

 console.table([
                    {
                        id: "1",
                        key: "value",
                        count: 2,
                        },
                     {
                         id: "2",
                         key: "value2",
                             count: 22,
                       },
                       {
                            id: "3",
                            key: "value3",
                                count: 5,
                               },
                     ]);

The next useful method is error

console.error()

• useful to differentiate errors from output logs while debugging

• red in color

Next one, useful while calculating runnning times is time method

Time(time,timeLog,timeEnd)

• To understand this, let us assume scenario of a stopwatch

• console.time()
  • equivalent to stopwatch start
• console.timeLog()
  • like stopwatch lap/split

• console.timeEnd()

  • stopwatch end

  • It works on basis of label. Label should be the same to get expected output

        console.time("ForLoop");  
                // "ForLoop" is label here
        for (let i = 0; i < 5; i++) {
        console.timeLog('ForLoop'); 
          }
          console.timeEnd("ForLoop");
    

  

Next one is warning

console.warn();

 - yellow color 
 - For warnings

console.assert()

console.assert(assert_statement,message)

• evaluate assertion statement and if it is false displays the message

  if(3!=2){
    console.error({ msg1: "msg1", msg2: "msg2" });
  }
            -----------same as---------
console.assert(3 === 2, { msg1: "msg1", msg2: "msg2" });

Other way console.assert(assert_statement,message,args)

console.assert(false, "%d nd type for  %s ",2,"console.assert() method");

Useful method for counting

• console.count() works on basis of label

  • console.count(label)

         for (let i = 0; i < 3; i++) {
           console.count("label");
           console.count();
           console.count(i);
         }
    
         // output for
         console.count()  console.count("label")   console.count(i)
         default: 1                label: 1                0: 1
         default: 2                label: 2                1: 1
         default: 3                label: 3                2: 1
    

    • console.count()
      • if no label is mentioned it will consider default as label
      • The problem with default is it will continue the count like this

  • console.countReset(label)

  • resets count of specified label to 0

I mentioned only few methods which I think are more helpful.To check all the available methods refer here