Function updater

internal/driver/html/common.js:588–609

()

    elem.addEventListener('touchstart', updater);

    function updater() {
      // The selection can be in one of two modes: regexp-based or
      // list-based.  Construct regular expression depending on mode.
      let re = regexpActive
          ? search.value
          : Array.from(getSelection().keys()).map(key => pprofQuoteMeta(nodes[key])).join('|');

      setHrefParams(elem, function (params) {
        if (re != '') {
          // For focus/show/show-from, forget old parameter. For others, add to re.
          if (param != 'f' && param != 's' && param != 'sf' && params.has(param)) {
            const old = params.get(param);
            if (old != '') {
              re += '|' + old;
            }
          }
          params.set(param, re);
        } else {
          params.delete(param);
        }
      });
    }
  }

  function setHrefParams(elem, paramSetter) {