Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': The provided value cannot be converted to a sequence

user_925897 0
Viewed 13188

I'm getting the following error

Uncaught TypeError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': The provided value cannot be converted to a sequence.

on this line in a webworker:

postMessage("hi", "http://localhost:8000");

(in fact, that is the entirety of the webworker).

The base file contains:

var myWorker = new Worker("test.js");
myWorker.onmessage = function (e) {
    console.log('Message received from worker');
};

I'm not sure which value it's complaining about and I'm not sure what it means for it to be converted to a "sequence".

web-worker
2 Answers

When I was trying to pass more than 1 parameter in postMessage, same error message was displayed.

One solution is to pass it using JSON object.

For example: postMessage({'key1': 'value1','key2': 'value2'});

Then, when you want to access it, you can do the following:

onmessage = function(event){

    var v1 = event.data.key1 ;
    var v2 = event.data.key2;
}
user_94203350
Related