Method install

www/js/_hyperscript.js:9825–9852

(target, source, args, runtime2)

      this.displayName = "when ... changes";
    }
    install(target, source, args, runtime2) {
      var feature = this;
      queueMicrotask(function() {
        for (var i = 0; i < feature.exprs.length; i++) {
          (function(expr) {
            runtime2.reactivity.createEffect(
              function() {
                return expr.evaluate(
                  runtime2.makeContext(target, feature, target, null)
                );
              },
              function(newValue) {
                var ctx = runtime2.makeContext(target, feature, target, null);
                ctx.result = newValue;
                ctx.meta.reject = function(err) {
                  console.error(err.message ? err.message : err);
                  runtime2.triggerEvent(target, "exception", { error: err });
                };
                ctx.meta.onHalt = function() {
                };
                feature.start.execute(ctx);
              },
              { element: target }
            );
          })(feature.exprs[i]);
        }
      });
    }
  };

  // src/parsetree/features/bind.js