Escape some characters in JavaScript

Question

I have an ajax call in my legacy application:

i2b2.CRC.ajax.getQueryResultInstanceList_fromQueryResultInstanceId(
    "CRC:QueryStatus", {qr_key_value: rec.QRS_ID}, scopedCallbackQRSI
);

I want to add this Ajax request in setTimeout method. To escape " I added \. I came up with following line:

setTimeout("i2b2.CRC.ajax.getQueryResultInstanceList_fromQueryResultInstanceId(\"CRC:QueryStatus\", {qr_key_value: rec.QRS_ID}, scopedCallbackQRSI)",50000);

Now I am not getting any error on console but Ajax call is also not working either.

Am I missing anything?

Rob W · Accepted Answer · 2011-10-14 10:58:25Z

1

The rec and/or scopedCallbackQRSI variables are probably defined in a local scope (thus not accessible from the global scope). When setTimeout is called with a stringified function as a first argument, the function is executed within the scope of window.

To maintain the scope (and be able to use the local variables), wrap your code in a function, and pass it as a first argument to setTimeout:

setTimeout(function(){
    i2b2.CRC.ajax.getQueryResultInstanceList_fromQueryResultInstanceId("CRC:QueryStatus", {qr_key_value: rec.QRS_ID}, scopedCallbackQRSI);
}, 50000);

answered Oct 14, 2011 at 10:58

Rob W

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4 Comments

Ajinkya Over a year ago

Ya they are define in local scope. Russ solution looks bit easy I guess.

Rob W Over a year ago

Russ' "solution" doesn't work, because it's fundamentally not different from your current code.

Ajinkya Over a year ago

I tried your solution no error but seems like Ajax request is not triggered.

BGerrissen Over a year ago

@Ajinkya This solution should solve your main problem, if the request is not triggered, it's another problem.

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