Less isruleset

Education is not limited to just classrooms. It can be gained anytime, anywhere... - Ravi Ranjan (M.Tech-NIT)

Less isruleset()

The Less isruleset() function takes a value as a parameter and returns TRUE if the value is a ruleset otherwise, returns FALSE.

isruleset() Function Example

Let's take an example to demonstrate the usage of isruleset() function in Less file.

Create a Less file named "simple.less", having the following code:

Less file: simple.less

  1. div {  

  2.     background:  isruleset(#ff0);  

  3.     border:      isruleset(blue);  

  4.     font:        isruleset("string");  

  5.     background:  isruleset(1234);  

  6.     border:      isruleset(56px);  

  7.     border:      isruleset(7.8%);  

  8. }  

Now open the node.js command prompt and execute the following code: lessc simple.less simple.css

Less isruleset function1

This will compile the "simple.less" file. A CSS file named "simple.css" will be generated.

For example:

Less isruleset function2

The generated CSS "simple.css", has the following code:


Less isruleset function3

  1. div {  

  2.   font: false;  

  3.   background: false;  

  4.   border: false;  

  5. }