JavaScript break

The break statement terminates a current loop or a switch statement.

The continue statement "jumps over" one iteration in the current loop.


Break in a Switch Statement

The break statement can be used to "jump out" of a switch statement.

JS JavaScript - Break in a Switch Statement

<!DOCTYPE html>
 
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
    <body>
    <h1>JavaScript Break</h1>
    <p>The Switch Statement</p>
     
    <button onclick="whichMonth(8)">Click me to test the switch statement</button>
     
    <script>
        function whichMonth(givenMonth) {
        var message = 1;
         
        switch (givenMonth) {
        case 1:
            message = "It is January, the winter is cold";
            break;
        case 2:
            message = "It is February";
            break;
        case 3:
            message = "It is March, spring is coming";
            break;
        case 4:
            message = "It is April";
            break;
        case 5:
            message = "It is May, perhaps the best month of the year";
            break;
        case 6:
            message = "It is June, the summer starts";
            break;
        case 7:
            message = "It is July";
            break;
        case 8:
            message = "It is August, the last summer month";
            break;
        }   

        document.getElementById("resultElement").innerHTML = message;
        }
    </script>
     
    <p id="resultElement"></p>
    </body>
</html>

Learn more about JavaScript Switch

Break and Continue in a Loop For Statement

The break statement can be used to jump out of a loop for, the code will then jump out and execute the code after the loop(if any).

The continue statement "jumps over" one iteration and continues with the next iteration in the loop.

JS JavaScript - Break and Continue in a Loop For Statement

<!DOCTYPE html>
 
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
    <body>
    <h1>JavaScript Break and Continue</h1>
    <p>Break and Continue</p>
     
    <button onclick="runTest(8)">Click me to test the break and continue</button>
     
    <script>
        function runTest(givenMonth) {
             
            var text = "";
            for (i = 0; i < 10; i++) 
                      {
                         if (i == 3)
                         {
                            continue; 
                         }
                         if(i == 5)
                         {
                            break; 
                         }
             
                         text += i + ", ";
            }
             
            document.getElementById("resultElement").innerHTML = text;
        }
        </script>
     
    <p id="resultElement"></p>
    </body>
</html>

Learn more about JavaScript Loop For

Break in a loop While Statement

The break statement can be used to jump out of a loop while.

JS JavaScript - Break in a loop While Statement

<!DOCTYPE html>
 
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<body>
<h1>JavaScript Break and Continue</h1>
<p>Break and Continue</p>
 
<button onclick="runTest()">Click me to test the break and continue</button>
 
<script>
        function runTest() {
 
        var message = "Counting numbers: ";
        var text = "";
 
        var i = 0;
 
        while (i < 10) {
           text += i + ", ";
           i++;
           if (i == 8) {
              break;
           }
        } 
 
        document.getElementById("resultElement").innerHTML = message + text;
     }
    </script>
 
<p id="resultElement"></p>
</body>
</html>

Learn more about JavaScript Loop While

Break used with Labeled Blocks

The break statement includes an optional label that allows the program to break out of a labeled statement.

JS JavaScript - Break used with Labeled Blocks

// Example how to use Label Statement
 
outer_block: {                 // Label outer_block
   inner_block: {              // Label inner_block
      console.log('1');
      break outer_block;       // This code-line BREAKS out of both inner_block and outer_block
      console.log(':-(');      // skipped
   }
   console.log('2');           // skipped
}

Break used with Label Blocks - continued

The following code uses the break statement with a label but it generates a syntax error.

The break statement is within block_1 but references block_2. A break statement can not reference a label outside its block

JS JavaScript - Break used with Label Blocks - continued

// This example will generate syntax error
// The referenced label is outside of the block
 
block_1: {
   console.log('1');
   break block_2;            // SyntaxError: label not found
}
 
block_2: {
   console.log('2');
}

BACK TO TOP






Check this out

JS JavaScript: Array Sort

The sort() method in JavaScript is sorting the elements in an array and will return the sorted array. The default sort order is according to string Unicode code points.

JS JavaScript: Var

Var is a keyword that is used to declare a variable.

But, you should NOT use var, use let when declaring a variable.

One of the most important things is that you should try to keep things simple!

JS JavaScript: Bitwise Operators

Bitwise operators will handle their operands as a sequence of 32 bits (zeroes and ones), and not like decimal, hexadecimal, or octal numbers. For example, the decimal number nine has a binary representation of 1001. Bitwise operators perform their operation....

JS JavaScript: Switch

The switch statement evaluates an expression and match the expression's value to a case clause.

A switch statement can replace multiple if checks.
It gives a more descriptive way to compare a value with multiple variants.


BACK TO TOP

JavaScript is one of the 3 core language technologies of the World Wide Web that all web developers must learn:

1.      HTML to define the content of web pages.

2.      CSS to specify the layout of web pages.

3.      JavaScript to program the behavior of web pages.

JavaScript is a scripting or programming language that allows you to implement complex things on web pages. Every time a web page does more than just sit there and display static information for you to look at, displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. − you can bet that JavaScript is probably involved.


The benefits of using JavaScript are:

1.      You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.

2.      Immediate feedback to the visitors − They don't have to wait for a page reload to see if they have forgotten to enter something.

3.      Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.

4.      Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.


BACK TO TOP

Need more Honney

NDC Conferences

The NDC Conferences (Norwegian Developers Conference) are one of the world`s largest independent software conferences for .NET & Agile development. The conference covers everything you need to know within software development. The conferences are held each year in many places such as Oslo, Copenhagen, London, Sydney and Minnesota.

Update Conference Prague

Update Conference Prague is the biggest developer conference in the Czech Republic. The conference is offering sessions delivered by the top experts from all around the world. Their goal is to inspire the attendees and enrich their knowledge.

Troy Hunt

Learn about Web Security from Troy Hunt. He is a really engaged speaker that frequently give talks on conferences around the world. Troy is a Microsoft MVP and you can even learn from him on some great courses on Pluralsight.

W3Schools

W3Schools.com is a great education Web Site for learning web technologies. On W3Schools you may find well organized basic to advanced tutorials and references.

Scott Hanselman

Learn about Web Technologies and new trends from Scott Hanselman. Scott Hanselman is an author of developer books and he is an engaged speaker that usually talks about the Microsoft stack. You may meet Scott on conferences around the world.

Developer Week

DeveloperWeek is one of the world’s largest developer conferences. Developer Week focus on new dev technologies, the conference have talks and workshops for newbies and experienced audience. You can attend on a Developer Week conference different places in Nothern America.


BACK TO TOP

Honneybag blog



Learn JavaScript Debugging

Searching for bugs and fixing them is called code debugging. The bugs might be difficult to diagnose and therefore it is important to have a good approach to find and fix the bugs effectively. Bugs in the code might be syntax errors or logical errors. Sometimes nothing happens when the code contains bugs and there is few indications where to search. Modern web browser includes a powerful suite of developer tools. The tools do a range of things...

Explore JavaScript Arrays

Arrays are frequently used by developers. Programming languages can have slightly different implementation of arrays. An array is an object that can store a collection of items. You may say it`s a special variable that can have more than one value. The array holds many values under a single name, and you may access the values by referring to an index number. The easiest way to create....

Ultimate Guide to HTML Colors

It is essential to give the user a good user experience. There are many things you should focus on, one of them is how you use colors on your website. We don't have to struggle with black and white TVs anymore. Users expect more and more and we can apply colors to everything we want. Texts, borders, backgrounds, shadows – in HTML they all can have whatever color you decide....

Wanna be a sheep? Check out the most popular subjects
HONNEYBAG BLOG
HONNEYBAGBLOG INSPIRE-AND-BE-INSPIRED
HTML FORMATTING
HTML ESSENTIALS
JAVASCRIPT ESSENTIALS
Wanna be a little different? Check out the less popular subjects
HONNEYBAG BLOGER
HTML ESSENTIALS
JAVASCRIPT BREAKER
HTML BUILDING-BLOCKS
HTML COMPUTER-CODE
BACK TO TOP