Detailed introduction to the console.group() function in JavaScript

When using console.log() or other log-level console output functions, the log output has no hierarchical relationship. When there is a lot of log output in the program, this limitation will cause a lot of trouble. To solve this problem, you can use console.group(). Take the following code as an example:

function doTask(){
    doSubTaskA(1000);
    doSubTaskA(100000);
    console.log("Task Stage 1 is completed");
    doSubTaskB(10000);
    console.log("Task Stage 2 is completed");
    doSubTaskC(1000,10000);
    console.log("Task Stage 3 is completed");
}
function doSubTaskA(count){
    console.log("Starting Sub Task A");
    for(var i=0;i
The output result in the Firebug console is:

You can see that there should be a certain hierarchical relationship between the log output There is no difference in display. In order to add a hierarchical relationship, you can group the log output. Insert console.group() at the beginning of the grouping and console.groupEnd() at the end of the grouping: 
function doTask(){
    console.group("Task Group");
    doSubTaskA(1000);
    doSubTaskA(100000);
    console.log("Task Stage 1 is completed");
    doSubTaskB(10000);
    console.log("Task Stage 2 is completed");
    doSubTaskC(1000,10000);
    console.log("Task Stage 3 is completed");
    console.groupEnd();
}
function doSubTaskA(count){
    console.group("Sub Task A Group");
    console.log("Starting Sub Task A");
    for(var i=0;i
Insert console.group() statement The output in the Firebug console is: 

#Browser support
console.group() is the same as console.log(), with debugging tools The browser has good support, and all major browsers support this function. 
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