Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.20)
// Compass (v1.0.3)
// ----

$first: first_1 first_2;
 $second: second_1 second_2;
 @each $data in $first {
  $i: index($first, $data);
    @each $content in $second {
    .example-class[data-reactid$='#{$data}'] {
        &:before {
          content: '#{$content}';
        }
    }

}

}

SassMeister-output.css

.example-class[data-reactid$='first_1']:before {
  content: "second_1";
}

.example-class[data-reactid$='first_1']:before {
  content: "second_2";
}

.example-class[data-reactid$='first_2']:before {
  content: "second_1";
}

.example-class[data-reactid$='first_2']:before {
  content: "second_2";
}