Wait until another thread is working in jquery

Question

1.00/5 (1 vote)

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Here, I am waiting for html button element from the popup iframe window. When a popup is open then my block of code will fire the click event on time and it's working fine, but my query is wanting to wait until not get button.

I have used the nested function calling with timeout thread, so when I call then work, but don't wait and go to the next task.

setPrint();

function setPrint() {
setTimeout(function () {
var btnprint = null;
var frame = $('#WindowFadeiFrame').get(0).contentDocument;
var btn = $('#btn', frame);
if (btn.length == 0) {
btnprint == null
console.log('not found');
}
else {
btn.click();
btnprint = btn;
console.log('found now');
}
if (btnprint == null) {
setPrint();
}
}, 100);
}

What I have tried:

I have made busy to compile with the loop until not get button, but I got to hang my site.

Posted 1-Jan-18 17:16pm

mehul.prajapati

Updated 1-Jan-18 19:26pm

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Karthik_Mahalingam · Accepted Answer · 2018-01-01T19:26:00

Solution 1

use setInterval() [^] method to check for the element once the element is found the clear the setInterval object using clearInterval() [^] method. this will eliminate the looping to create delay which is a very bad idea

Posted 1-Jan-18 19:26pm

Karthik_Mahalingam

Comments

[no name] 2-Jan-18 1:43am

@karthik Bangalore, setInterval is also not wait until not get a button. i want that: first call setprint() and next another code. but must call another call after getting response of setprint().

Karthik_Mahalingam 2-Jan-18 2:19am

setInterval is used to check the object in a periodic interval.

[no name] 2-Jan-18 2:41am

setPrint();
alert("hi");

here,I don't want to call alert('hi) until not get button and click it.
setPrint() is nested function, so it call itself until not get button.

Karthik_Mahalingam 2-Jan-18 2:50am

so you want to call alert, only when the button is found in the iframe, correct?

[no name] 2-Jan-18 2:42am

setInterval is separate thread. so i can't handle it.

Karthik_Mahalingam 2-Jan-18 3:00am

try

 function setPrint(callback) {

            var obj = setInterval(function () {

                var frame = $('#WindowFadeiFrame').get(0).contentDocument;
                var btn = $('#btn', frame);
                if (btn.length == 0) {
                    console.log('not found');
                }
                else {
                    btn.click();
                    console.log('found now');
                    clearInterval(obj);
                    callback();
                }
            }, 100);

        }

        setPrint(callback)
        function callback() {
            // write all your code here which need to be executed after finding the control from iframe
            alert('');
        }

[no name] 2-Jan-18 3:23am

yes, it's work fine. thank you

Karthik_Mahalingam 2-Jan-18 3:35am

Welcome