@statewalker/webrun-devtools/src/background/api/debugger/$once.js

DevTools Extension for the StateWalker WebRun framework

export async function $once(target, event) {
  let handler;
  const promise = new Promise((resolve, reject) => {
    chrome.debugger.onEvent.addListener(
      (handler = (source, method, params) => {
        if (source.tabId !== target.tabId) return;
        if (method !== event) return;
        resolve({
          method,
          params,
        });
      })
    );
  });
  promise.finally(() => chrome.debugger.onEvent.removeListener(handler));
  return promise;
}