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 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" });
    

    

  • 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

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