Function define

index.js:233–278

(selector, definition)

    return (config[selector] || attributes).o;
  };
  var define = function define(selector, definition) {
    if (-1 < query.indexOf(selector)) throw new Error('duplicated: ' + selector);
    flush();
    var listeners = [];
    var retype = create(null);

    for (var k = keys(definition), i = 0, length = k.length; i < length; i++) {
      var key = k[i];

      if (/^on/.test(key) && !/Options$/.test(key)) {
        var options = definition[key + 'Options'] || false;
        var lower = key.toLowerCase();
        var type = lower.slice(2);
        listeners.push({
          t: type,
          o: options
        });
        retype[type] = key;

        if (lower !== key) {
          type = key.slice(2, 3).toLowerCase() + key.slice(3);
          retype[type] = key;
          listeners.push({
            t: type,
            o: options
          });
        }
      }
    }

    if (listeners.length) {
      definition.handleEvent = function (event) {
        this[retype[event.type]](event);
      };
    }

    query.push(selector);
    config[selector] = {
      m: new WeakMap(),
      l: listeners,
      o: definition
    };
    parse(document.querySelectorAll(selector));
    whenDefined(selector);
    if (!lazy.has(selector)) defined[selector]._();
  };
  var defineAsync = function defineAsync(selector, callback, _) {
    lazy.add(selector);
    define(selector, {