Method callHook

src/core/init/lifecycle.js:30–79

(hookName, data, next = noop)

    }

    callHook(hookName, data, next = noop) {
      const queue = this._hooks[hookName];
      const catchPluginErrors = this.config.catchPluginErrors;

      const step = function (index) {
        const hookFn = queue[index];

        if (index >= queue.length) {
          next(data);
        } else if (typeof hookFn === 'function') {
          const errTitle = 'Docsify plugin error';

          if (hookFn.length === 2) {
            try {
              hookFn(data, result => {
                data = result;
                step(index + 1);
              });
            } catch (err) {
              if (catchPluginErrors) {
                console.error(errTitle, err);
              } else {
                throw err;
              }

              step(index + 1);
            }
          } else {
            try {
              const result = hookFn(data);

              data = result === undefined ? data : result;
              step(index + 1);
            } catch (err) {
              if (catchPluginErrors) {
                console.error(errTitle, err);
              } else {
                throw err;
              }

              step(index + 1);
            }
          }
        } else {
          step(index + 1);
        }
      };

      step(0);
    }
  };
}