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This regular expression is not working as expected.Please suggest other way to validate this regular expression in javascript.
var patt = new RegExp('^(PK\d{2}[A-Z]{4}\d{16})|(\d{9,20})$');
patt.test('PK12FKIE1234567890123456');
You need put both patterns inside a single group so that the anchors should apply to both.
var patt = /^(?:(PK\d{2}[A-Z]{4}\d{16})|(\d{9,20}))$/;
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i am facing issue when using backticks , The browser show it string,
example:
<h2>${item.title}</h2>
Output:
${item.title}
I don't know where to using this. but simply you can use backticks like this.
In HTML
<div id="title"></div>
In Javascript
const titleTag = `<h2>${item.title}</h2>`;
const element = document.getElementById("title");
element.innerHTML = titleTag;
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I have a form and I want to accept pipe separated values for a particular field only in the format
4 digits|8digits|any number of digits.
I tried using ^\d{1,6}(|\d{1,6}){3}
But this is wrong.
Try \d{4}\|\d{8}\|\d* if the any number of digits can be 0, if not, then try \d{4}\|\d{8}\|\d+
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I'm trying to learn regex. I need to find +46 and replace it with 0. I've been racking my brain but I can't figure out the correct syntax. I'm trying to do it in JS with replace.
Any takers?
Use .replace():
"987654321+46".replace("+46", "0")
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I got a result "\r\n5".
I want to remove "\r\n" and take only number 5.
How do i take the number and remove "\r\n" using javascript replace function.
please anyone help me.
Why do you want to use replace us this
"\r\n5".match(/\d+/)[0]
The trim() method returns the string stripped of whitespace from both ends. trim does not affect the value of the string itself.,should be work
"\r\n5".trim();
JS FIDDLE
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I'm trying to have my numbers in a format that is easier for the user to read.
Eg. Instead of: 12349568483, it would be: 12 349 568 483.
I was wondering if there is a simple way to do this?
var a = "12349568483";
a = a.split('').reverse().join('').replace(/([0-9]{3})/g, "$1 ").split('').reverse().join('');