To get the number of days between two dates in JavaScript, we will be understanding four different approaches with stepwise explaination and example codes. In this article, we are having two different dates and our task is to get the number of days between two dates in JavaScript. Approaches to Get the Number of Days Between Two Dates Here is a list of approaches to get the number of days between two dates in JavaScript which we will be discussing in this article with stepwise explaination and complete example codes. Get Number of Days Using ... Read More

The following are the details of the maximum size of web browser’s cookies value −Web BrowserMaximum cookiesMaximum size per cookieGoogle Chrome1804096 bytesFirefox1504097 bytesOpera1804096 bytesAndroid504096 bytes

To get dates in JavaScript, use the getTime() method. Forgetting the difference between two dates, calculate the difference between date and time.ExampleYou can try to run the following code to learn how to calculate a difference between two dates −Live Demo                    var dateFirst = new Date("11/25/2017");          var dateSecond = new Date("11/28/2017");          // time difference          var timeDiff = Math.abs(dateSecond.getTime() - dateFirst.getTime());          // days difference          var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));          // difference          alert(diffDays);          

Here’s the best way to read cookies by name in JavaScript. The following is the function −function ReadCookie() {    var allcookies = document.cookie;    document.write ("All Cookies : " + allcookies );    // Get all the cookies pairs in an array    cookiearray = allcookies.split(';');    // Now take key value pair out of this array    for(var i = 0; i < cookiearray.length; i++) {       name = cookiearray[i].split('=')[0];       value = cookiearray[i].split('=')[1];       document.write ("Key is : " + name + " and Value is : " + value);    } }

Tables in HTML can have horizontal header and vertical header. For the horizontal header, we need to set all inside a single  tag. Syntax Following is the syntax to set horizontal header for a table − horizontal header1… horizontal header2… Example 1 Now let us see an example program to set horizontal header for a table. DOCTYPE html> table, tr, th, ... Read More

To generate a random number, we use the Math.random() function. This method returns a floating-point number in the range 0 (inclusive) to 1 (exclusive). To generate random numbers in different range, we should define the minimum and maximum limits of the range. Please follow the second syntax below for this. To generate random integers, you can follow the third and fourth syntax discussed below. As the Math.random() method gives us a random floating point number so to convert the result into an integer, we need to apply some basic math. Please follow the below syntaxes. Syntax Following is the syntax ... Read More

The standard Unix epoch is an expression in seconds. The Unix epoch or Unix time is the number of seconds elapsed since January 1, 1970.The getTime() method is used to return the millisecond representation of the Date object.To get time in milliseconds, use the following:var milliseconds = (new Date).getTime();

The rowspan and colspan are the attributes of tag. These are used to specify the number of rows or columns a cell should merge. The rowspan attribute is for merging rows and the colspan attribute is for merging columns of the table in HTML. These attributes should be placed inside the tag as shown in the image given below − Syntax Following is the syntax to merge table cells in HTML − cell data cell data Example 1 − Setting the rowspan Now let us look at an example where we set the rowspan of the ... Read More

To get an integer in the string “abcde 30”, use the following regex in JavaScript, else it will return NaN. With that, use parseInt() to get the numbers with regex under String match() method −ExampleLive Demo                    var myStr = "abcdef 30";          var num = parseInt(myStr.match(/\d+/))          alert(num);          

Use the toString() method to get the string representation of a number. You can try to run the following code to print a string representation of numbers like 20, -40, 15.5 −ExampleLive Demo                    var num1 = 25;          document.write(num1.toString()+"");          document.write((30.2).toString()+"");          var num2 = 3;          document.write(num2.toString(2)+"");          document.write((-0xff).toString(2));           Output25 30.2 11 -11111111Above, you can see we added a parameter to the toString() method. This is an optional parameter, which allows you to add an integer between 2 and 36, which is the base for representing numeric values.