Can we write for loop in html?

I have an html template which I use in marionette view . I pass a parameter in the template when I call it inside the render function . I want to add multiple div elements depending on the value of the parameter .How can I add for loop inside html template??

    

        

            

            

            

            

           
            
           /* I have passed a variable here named allWidgets. I want to add the number of divs(
) equal to the length of allWidgets array. How do I do that*/ 
        
    

Erik

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asked Dec 5, 2014 at 11:11

2

    

        

            

            

            

            

            <%  var i;
            for i in allWidgets{ %>
                

            
            }%>
        
    

answered Dec 8, 2014 at 6:49

Mayur LunawatMayur Lunawat

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1

If you talking about(I am not sure that understand the question exactly),Could you try this;

    

        

            

            
            

            



           
                 // Here, you can add parameters about widget objects in allWidgets
                 
 
           
        
    

You must also define the top of your jsp file below code,

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

answered Dec 5, 2014 at 14:29

Semih EkerSemih Eker

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2

If you are in Angular use *ngFor where w is now each element in allWidgets array and will create a div for each element. You may need binding around the [data-role].

Tzar

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answered Oct 17, 2019 at 14:53

1

Loops can execute a block of code a number of times.

JavaScript Loops

Loops are handy, if you want to run the same code over and over again, each time with a different value.

Often this is the case when working with arrays:

Instead of writing:

text += cars[0] + "
";
text += cars[1] + "
";
text += cars[2] + "
";
text += cars[3] + "
";
text += cars[4] + "
";
text += cars[5] + "
";

You can write:

for (let i = 0; i < cars.length; i++) {
  text += cars[i] + "
";
}

Try it Yourself »

Different Kinds of Loops

JavaScript supports different kinds of loops:

• for - loops through a block of code a number of times
• for/in - loops through the properties of an object
• for/of - loops through the values of an iterable object
• while - loops through a block of code while a specified condition is true
• do/while - also loops through a block of code while a specified condition is true

The For Loop

The for statement creates a loop with 3 optional expressions:

for (expression 1; expression 2; expression 3) {
  // code block to be executed
}

Expression 1 is executed (one time) before the execution of the code block.

Expression 2 defines the condition for executing the code block.

Expression 3 is executed (every time) after the code block has been executed.

Example

for (let i = 0; i < 5; i++) {
  text += "The number is " + i + "
";
}

Try it Yourself »

From the example above, you can read:

Expression 1 sets a variable before the loop starts (let i = 0).

Expression 2 defines the condition for the loop to run (i must be less than 5).

Expression 3 increases a value (i++) each time the code block in the loop has been executed.

Expression 1

Normally you will use expression 1 to initialize the variable used in the loop (let i = 0).

This is not always the case. JavaScript doesn't care. Expression 1 is optional.

You can initiate many values in expression 1 (separated by comma):

Example

for (let i = 0, len = cars.length, text = ""; i < len; i++) {
  text += cars[i] + "
";
}

Try it Yourself »

And you can omit expression 1 (like when your values are set before the loop starts):

Example

let i = 2;
let len = cars.length;
let text = "";
for (; i < len; i++) {
  text += cars[i] + "
";
}

Try it Yourself »

Expression 2

Often expression 2 is used to evaluate the condition of the initial variable.

This is not always the case. JavaScript doesn't care. Expression 2 is also optional.

If expression 2 returns true, the loop will start over again. If it returns false, the loop will end.

If you omit expression 2, you must provide a break inside the loop. Otherwise the loop will never end. This will crash your browser. Read about breaks in a later chapter of this tutorial.

Expression 3

Often expression 3 increments the value of the initial variable.

This is not always the case. JavaScript doesn't care. Expression 3 is optional.

Expression 3 can do anything like negative increment (i--), positive increment (i = i + 15), or anything else.

Expression 3 can also be omitted (like when you increment your values inside the loop):

Example

let i = 0;
let len = cars.length;
let text = "";
for (; i < len; ) {
  text += cars[i] + "
";
  i++;
}

Try it Yourself »

Loop Scope

Using var in a loop:

Example

var i = 5;

for (var i = 0; i < 10; i++) {
  // some code
}

// Here i is 10

Try it Yourself »

Using let in a loop:

Example

let i = 5;

for (let i = 0; i < 10; i++) {
  // some code
}

// Here i is 5

Try it Yourself »

In the first example, using var, the variable declared in the loop redeclares the variable outside the loop.

In the second example, using let, the variable declared in the loop does not redeclare the variable outside the loop.

When let is used to declare the i variable in a loop, the i variable will only be visible within the loop.

For/Of and For/In Loops

The for/in loop and the for/of loop are explained in the next chapter.

While Loops

The while loop and the do/while are explained in the next chapters.

How do you loop through HTML?

How do you print a loop in HTML?

Can we use for loop in CSS?

What is looping statement in HTML?