Underscore.js _.now() function

0 0 1 minute read

Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. _.now() function is used to return the timestamp of the current time. This method can be useful when working with animations in the browser.

Syntax:

_.now();

Parameters: It takes no parameters.

Returns: The return type is number.

Note: It is very necessary to link the underscore CDN before going and using underscore functions in the browser. When linking the underscore.js CDN The “_” is attached to the browser as a global variable.

Few examples are given below for a better understanding of the function.

Example 1:

<!DOCTYPE html>  
<html>  
  <head>  
    <script src =   
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" >  
    </script>  
   </head>  
  <body> 
    <script> 
      console.log(`Current timestamp is: ${_.now()}`) 
    </script> 
  </body>  
</html>

Output:

Example 2:

<!DOCTYPE html>  
<html>  
  <head>  
    <script src =   
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" >  
    </script>  
   </head>  
  <body> 
    <script> 
    //creating print function to print timestamp after delay of 10ms 
      function print(){ 
        setTimeout(()=>{ 
          console.log(`Current timestamp is: ${_.now()}`) 
        }, 10) 
      } 
      //running this function 5 times using _.times() function. 
      _.times(5, print) 
      console.log("Type of timestamp is: ", typeof(_.now())) 
    </script> 
  </body>  
</html>

Output:

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