Function _parseScrollModifiers

www/js/_hyperscript.esm.js:6248–6280

(parser)

  }
};
function _parseScrollModifiers(parser) {
  parser.matchToken("the");
  var verticalPosition = parser.matchAnyToken("top", "middle", "bottom");
  var horizontalPosition = parser.matchAnyToken("left", "center", "right");
  if (verticalPosition || horizontalPosition) {
    parser.requireToken("of");
  }
  var target = parser.requireElement("unaryExpression");
  var plusOrMinus = parser.matchAnyOpToken("+", "-");
  var offset;
  if (plusOrMinus) {
    parser.pushFollow("px");
    try {
      offset = parser.requireElement("expression");
    } finally {
      parser.popFollow();
    }
  }
  parser.matchToken("px");
  var container;
  if (parser.matchToken("in")) {
    container = parser.requireElement("unaryExpression");
  }
  var smoothness = parser.matchAnyToken("smoothly", "instantly");
  var scrollOptions = { block: "start", inline: "nearest" };
  var blockMap = { top: "start", bottom: "end", middle: "center" };
  var inlineMap = { left: "start", center: "center", right: "end" };
  var behaviorMap = { smoothly: "smooth", instantly: "instant" };
  if (verticalPosition) scrollOptions.block = blockMap[verticalPosition.value];
  if (horizontalPosition) scrollOptions.inline = inlineMap[horizontalPosition.value];
  if (smoothness) scrollOptions.behavior = behaviorMap[smoothness.value];
  return { target, offset, plusOrMinus, scrollOptions, container };
}
function _parseSmoothness(parser) {
  var smoothness = parser.matchAnyToken("smoothly", "instantly");
  if (!smoothness) return void 0;