Why does not Chrome allow Web Workers to be run in JavaScript?

Question

If I try to use web workers through a JavaScript file, Chrome throws an error -

Uncaught SecurityError: Failed to create a worker: script at \'(path)

Answer 1

var cblock=`

function workerFunc(e){

    console.info('Hello World!',e.data.msg)
    postMessage({msg:'Complete!'})
}

addEventListener('message',workerFunc)
`    
var a=new Worker(URL.createObjectURL(new Blob( [cblock], {type:'text/javascript'} )))    
a.onmessage=function(e){ console.info('My worker called!',e.data.msg) }    
a.onerror=function(e){ console.info( JSON.stringify(e,' ',2) ) }    
a.postMessage({ msg:'Chrome WebWorkers work!' }) 

// Hello World! Chrome WebWorkers work!
// My worker called! Complete!