How to use scss @include-CodePudding

I have a SCSS file, and I want to @include transition(all, 0.5s); But scss gives

Error message:

Scss compiler Error: no mixin named transition

Here is my SCSS:

a {
  float: left;
  line-height: 70px;
  text-decoration: none;
  color: white;
  @include transition(all, 0.3s);
   &:hover {
     background-color: #444;
     @include transition(all, .5s);
   }
}

CodePudding user response：

 @mixin reset-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

then to use it

@include reset-list

https://sass-lang.com/documentation/at-rules/mixin

But I see that you are trying to use parameters in your mixin

https://www.tutorialspoint.com/sass/arguments.htm#:~:text=Explicit keyword argument can be,of argument can be omitted.

@mixin bordered($color, $width: 2px) {
   color: #77C1EF;
   border: $width solid black;
   width: 450px;
}

.style  {
   @include bordered($color:#77C1EF, $width: 2px);
}

So in short: Declare your mixin before including it. Your error says that the mixin does not exist

@mixin transition($includes, $length) {
   transition: $includes $length;
}

.style  {
   @include transition($includes: all, $length: .2s);
}