How to check format of a string in javascript

Question

I'm quite new to javascript and I can't find a single guide how to check string format (except whole code how to check e-mail etc).

So I need to check if my variable is in this format - applicationcode0001. The text is not going to change - so something like this - variable=="applicationcode"+[number]+[number]+[number]+[number]

If you can provide me some link how to check string variables like that, I will be super happy.

Thanks, MJ

[MDN: Regular Expressions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions) — str, Jan 23 '18 at 13:07
thanks, that's what i needed and didnt know how to name it :) — Michal Janošec, Jan 23 '18 at 13:16

score 2 · Accepted Answer · edited Jan 23 '18 at 13:19

2

var myRe = /^applicationcode\d{4}$/;
console.log(myRe.test('applicationcode0001'));

edited Jan 23 '18 at 13:19

Kos

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answered Jan 23 '18 at 13:17

Mati Tucci

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score 1 · Answer 2 · answered Jan 23 '18 at 13:28

1

    var regex = RegExp('applicationcode[0-9]{4}','g');
    var str1 = 'applicationcode1234';

    console.log(regex.test(str1));
    // expected output: true
    //

answered Jan 23 '18 at 13:28

Biswadev

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How to check format of a string in javascript

2 Answers2