javascript : how to replace symbol with regex?

Question

how to remove the symbols such as ▼, >>,<< and others using the regex in javascript?

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Rafe Kettler
– Rafe Kettler

2010-12-23 05:12:33 +00:00
Commented Dec 23, 2010 at 5:12 — Rafe Kettler
– Rafe Kettler, Commented Dec 23, 2010 at 5:12

PleaseStand · Accepted Answer · 2010-12-23 05:36:26Z

2

You can use the replace function for this, specifying the empty string as the replacement string. Here are a couple examples.

If you only want to strip specific characters:

s = s.replace(/[▼><]/g, '');

Or using a Unicode escape sequence:

s = s.replace(/[\u25bc><]/g, '');

If you want to strip all but alphanumeric characters:

s = s.replace(/[^A-Za-z0-9]/, '');

Edit: described Unicode escape sequence usage.

edited Dec 23, 2010 at 5:36

answered Dec 23, 2010 at 5:12

PleaseStand

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3 Comments

user495688 Over a year ago

if i want to replace any symbol which possible appear in the browser,how i remove it?

BoltClock Over a year ago

@user495688: But all these characters appear on your browser.

user495688 Over a year ago

i have remove all character var emailPattern = /[_a-zA-Z0-9\.]+@[^\.a-zA-Z0-9]+\.[a-zA-Z]+/gi; var urlPattern = /[a-z]+:\/\/[^\s]+/gi; var numberOrSymbolPattern = /[^0-9\.,!@#\$%\^\&*()`~_\-=\+|\\{}[]\s:;<>\?\/]+/gi; but when i testing my application there are some symbol which can't remove

Kai · Accepted Answer · 2010-12-23 05:22:15Z

1

I'd remove non-standard character(s) by using the unicode token \u and the corresponding character code.

For example:

// Remove "▼" using its character code
var s = "I like milk ▼.".replace(/\u9660/g, "");

answered Dec 23, 2010 at 5:22

Kai

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Comments

broofa · Accepted Answer · 2012-04-26 17:20:45Z

0

You can use replace(/[\u0100-\uffff]/g, '') to remove characters outside the extended ASCII range.

E.g.

>>> "I 𝔻Ȯ𝓝ʼṮ　like ȖŋŀℭỚ𝕯Ễ　Regexs‽‽‽".replace(/[\u0080-\uffff]/g, '')    
"I like Regexs"

answered Apr 26, 2012 at 17:20

broofa

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