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SassMeister-input.scss

// ----
// Sass (v3.4.0.rc.1)
// Compass (v1.0.0.alpha.20)
// ----

/**
 * Clamp `$value` between `$min` and `$max`.
 *
 * @access public
 *
 * @author Stan Angeloff
 *
 * @link https://github.com/sass/sass/pull/402 Clamp function on Sass's repo
 *
 * @param {Number} $value   - value to clamp
 * @param {Number} $min (0) - minimal value
 * @param {Number} $max (1) - maximum value
 *
 * @throws All arguments must be numbers for `clamp`.
 * 
 * @return {Number} - clamped number
 */

@function clamp($value, $min: 0, $max: 1) {
  @if type-of($value) != "number" or type-of($min) != "number" or type-of($max) != "number" {
    @error "All arguments must be numbers for `clamp`.";
  }

  @return if($value > $max, $max, if($value < $min, $min, $value));
}

test {
  clamp: clamp(42);
  clamp: clamp("string");
}

SassMeister-output.css

All arguments must be numbers for `clamp`.