Javascript regex in attribute [duplicate]

Question

I need to use data attribute for regex just as

<div data-regex="REGEX-HERE">

and then get the value by javascript and put in a variable. and then do a test like

var regex = $(this).attr("data-regex");

regex.test(name)

when I tried to use "^[\x20-\x7E]+$" for testing english character is didn't work. Note when I tried this

var regex = /^[\x20-\x7E]+$/;

It worked.

Thanks in advance

So this ultimately has nothing to do with attributes, but rather creating a regular expression from a string, right? If so, search for that and you'll find lots of answers. — cookie monster
– cookie monster, Commented Jun 1, 2014 at 18:33
I didn't find. and I think here is simple for beginners (like me) to understand rather than a question with a big piece of code — user3530661
– user3530661, Commented Jun 1, 2014 at 18:38
That question is clearly summarized in the title, and the answer shows a single line of code. That link is found as the first google result when searching "javascript create regex from string". Don't know how it can get any easier. It has nothing to do with being a beginner. Being a beginner doesn't excuse you from basic research efforts. — cookie monster
– cookie monster, Commented Jun 1, 2014 at 18:42
Yes sure, my excuse that English isn't my mother tongue and I can't speak / write it probably. I don't know what mean string. I have seen the code in the question you mentioned to, but I didn't understand what is going on. It may be easy for you to understand but for me it is hard. — user3530661
– user3530661, Commented Jun 1, 2014 at 18:49
Many people here don't have English as a native language. And even so, the term "string" doesn't help a perfect English speaker either. That is JavaScript language terminology. If you don't know that term, then you've not bothered to learn the basics, which would be another problem. Hard to believe that you know "regex" and "variable" but not "string". — cookie monster
– cookie monster, Commented Jun 1, 2014 at 18:53

Niels · Accepted Answer · 2014-06-01 18:33:53Z

2

You can do this:

var regex = new RegExp("^[\x20-\x7E]+$",""); // Modifiers on the tend

So finally:

var regex = new RegExp($(this).data("regex"));

regex.test(name)

answered Jun 1, 2014 at 18:33

Niels

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4 Comments

Sterling Archer Over a year ago

dat w3schools citation tho...

Niels Over a year ago

I am aware of the W3 is uncool protocol. But it has an explaination.

zzzzBov Over a year ago

new RegExp($(this).data('regex')) is a little nicer

Niels Over a year ago

Agree since data attributes are automaticaly tranferred to the data object once called one time.

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