Javascript TRUE is not defined or in quotes

Question

I have a XML file that contains

<car>
    <id>123</id>
    <sunroof>FALSE</sunroof>
    <service>TRUE</service>
</car>

The following code only works if I wrap TRUE inside quotes e.g (service == "TRUE")

var service = tis.find("service").text();

if(service === TRUE){
    var service_tag = '<a title="Service" href="">Service</a>'
} else {
    var service_tag = '';
}

Answer 1

Without quotes javascript will try to interpret TRUE as a value / expression. There is no value TRUE natively defined in javascript. There is true but javascript is case sensitive so it won't bind TRUE to true.

The value you get back from text() is a string primitive. Writing "TRUE" gives you back the string "TRUE" which does compare succesfully with the value service

Answer 2

JavaScript boolean true and false are lower case.

Answer 3

Set service equal to this, so JavaScript will be able to interpret your values:

var service = tis.find("service").text().toLowerCase();