htmx/event-header.js


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(function () {
  function stringifyEvent(event) {
    var obj = {};
    for (var key in event) {
      obj[key] = event[key];
    }
    return JSON.stringify(obj, function (key, value) {
      if (value instanceof Node) {
        var nodeRep = value.tagName;
        if (nodeRep) {
          nodeRep = nodeRep.toLowerCase();
          if (value.id) {
            nodeRep += "#" + value.id;
          }
          if (value.classList && value.classList.length) {
            nodeRep += "." + value.classList.toString().replace(" ", ".");
          }
          return nodeRep;
        } else {
          return "Node";
        }
      }
      if (value instanceof Window) return "Window";
      return value;
    });
  }

  htmx.defineExtension("event-header", {
    onEvent: function (name, evt) {
      if (name === "htmx:configRequest") {
        if (evt.detail.triggeringEvent) {
          evt.detail.headers["Triggering-Event"] = stringifyEvent(
            evt.detail.triggeringEvent,
          );
        }
      }
    },
  });
})();