css question, how to combine?

[Freeman35]

Hello,

How can I combine css in new css class name?

Example:

.Font_name {  
  font-family:Arial;
  font-weight:bold;
  font-style:normal;
}
.Font_ground {
  background-color: #fff;
}
.Size_1 {
    font-size:15px;
}
.Size_2 {
    font-size:12px;
}

how to?

.smallest {
 Font_name, 
 Font_ground,
 Size_2
}
.biggest {
 Font_name,
 Font_ground,
 Size_1
}

Thank you

[mhmda]

config.cls='Font_name smallest'

[Freeman35]

Thank you for answer,

 

config.cls='Font_name smallest'

 

Is this mean rigth code ?

.smallest {
 Font_name, 
Font_ground,
Size_2
}

config.cls='Font_name smallest'  is this aqual config.cls='Font_name Font_ground Size_2' ?

if yes, I wanna incliude bootstrap class into my css block, so I plain optimise my css,

for example,

.My_border{...} .My_Font{...} My_ground{...} My_Shadow{..}..... will be my style rules. After then
 

.My_Edit{

.My_border,

.My_Font

}

 

config.cls='My_Edit';

So I'm not write more time "font-family:Arial;........."  I hope I can translate my idea

Thank you

[mhmda]

No no I meant in my post that when using css as class in js you may use multiple css classes with ' ' (space).

In css declaration you cannot combine classes as you did.

Please refer to css declaration in the internet to be more familiar with it. 

[Freeman35]

Thank you,

I looked for in internet, and maybe in forum can knows, so asked.

I'm useing your wrote way, some time I add 4-5 names, I thinked maybe can find short way.

regards