Javascript Regular Expression not matching

Question

Morning All

I have a javascript regular expression that doesn't work correctly and I'm not sure why.

I'm calling the API at https://uptimerobot.com, and getting back a JSON string with details of the monitor statues. This is however wrapped in a function call syntax. Like this:

jsonUptimeRobotApi({MASKED-STATUES-OBJ})

As this call is being made from a generic script I was hoping to test the response to see if it had this type of syntax wrapping then parse it accordingly.

However I can't seem to find a RegEx syntax to match the logic:

Start of string
An unknown number of characters [a-zA-Z]
Open parentheses
Open brace
An unknown number of any character
Close brace
Close parentheses
End of string

This looks right:

^[a-zA-Z]+\(\{.*\}\)$

And works in regex101: https://regex101.com/r/sE7dM6/1

However it fails in my code and via jsFiddle: https://jsfiddle.net/po49pww3/1/

The "m" was added in regex101 as the actual string is much longer, and failed to match without it, however a number of small tweeks that I've tried havn't resulted in a match in jsFiddle.

Anyone know whats wrong?

Avinash Raj · Accepted Answer · 2015-08-20 09:55:39Z

6

Escape all the backslashes one more time because within " delimiters, you must escape the backslash one more time or otherwise it would be treated as an escape sequence.

var regEx = new RegExp("^[a-zA-Z]+\\(\\{.*\\}\\)$", "m");

DEMO

edited Aug 20, 2015 at 9:55

answered Aug 20, 2015 at 9:53

Avinash Raj

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3 Comments

sp00m Over a year ago

Because using a string literal :)

Morvael Over a year ago

Thanks guys, had just got there myself jsfiddle.net/po49pww3/4 Always the way, typing the question gives you enough of a break to look at the problem afresh.

Jonny 5 Over a year ago

☆🍷 CoNgRaTs 🎇 100k 🍸 Avinash! 🎉

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