Have Callback Work Synchronously In Javascript

I am working with a package called DSBridge to connect a mobile application (iOS code in this case) to javascript code containing the main logic of my application. This involves ru

Solution 1:

You can pass a callback to the read() function and invoke it when the underlying Objective-C code returns

functionread(clb) {
  data = "reading";
  dsBridge.call("read", data, function (read_result) {
    clb(read_result);
  });
}

and your caller

read(res => {
  //result available hereconsole.log(res);
})

Alternatively with Promises

functionread() {
  data = "reading";
  returnnewPromise(resolve => {
    dsBridge.call("read", data, function (read_result) {
      resolve(read_result);
    });
  });
}

and the caller

read()
  .then(res => {
     //result available hereconsole.log(res);
   })