Description

Check for equality to null is unnecessarily explicit since null is falsey in Sass.

a {
    @if $x == null {}
/**         ↑     ↑
 * == or != null is unncessary */
}

Examples

true

The following patterns are considered warnings:

a {
    @if $x == null {}
}

a {
    @if $x != null {}
}

The following patterns are not considered warnings:

a {
    @if $x {}
}

a {
    @if not $x {}
}