regex pattern for special characters in angular

Same case with $: the preceding subpattern should match right at the end of the string. It is most often used for text-based inputcontrols, but can also be applied to custom text-based controls. What is the difference between String and string in C#? including newlines. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. quantifier non-greedy (matching the minimum number of times), as /^ [A-Za-z0-9]+$/ Click To Copy Examples: Regex999 Pattern666 RegexPattern123 See Also: Currency Regular Expression Decimal Number Regular Expression Regular Expression To Match Only Alphabets And Spaces Characters & constructs: How many grandchildren does Joe Biden have? Next, you have to install a new angular project, you require to type and execute the following command. \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]. (For one or more characters), Try this. If it finds out other than the URL, it will display an error message to the user. (?i)^(A)$: indicates that the regular expression A is case insensitive. would be used to represent a literal dot character. Equivalent to The match made with this part of the pattern is remembered for later use, as described in Using groups. Wall shelves, hooks, other wall-mounted things, without drilling? If the number is invalid, the script informs the user that the phone number is not valid. Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). Why Is PNG file with Drop Shadow in Flutter Web App Grainy? a match. Angular:How I used Regex to validate form and display the type (uppercase, special, etc)of each character typed in a textbox and its count | by AngularEnthusiast | JavaScript in Plain English Write Sign up Sign In 500 Apologies, but something went wrong on our end. You may use something like the one below: To find minimum of 1 and maximum of any count: These patterns have Special Characters ranging between 032 to 047, 058 to 064, 091 to 096, and 123 to 126. We will learn Angular validation to allow only alphabets and numbers in input field and restrict special characters. We have to call a validation function on keypress, paste and input event. you can use Regex with Ng-pattern and Display the message through ng-message $scope.useOnlySpecialCharacters = /^[a-zA-Z0-9]*$/; <input type="text" ng-model="specialcharacters" ng-pattern="useOnlySpecialCharacters" /> show message through ng-message <div ng-message="pattern"> Please Enter AlphaNumeric </div> OR Best Option is to use Directives "50%". by . Is every feature of the universe logically necessary? Regex pattern including all special characters To create a regular expression that includes all special characters, you can use the following pattern: [ ! Wall shelves, hooks, other wall-mounted things, without drilling? That regex pattern is simply saying: "find me a string that starts with Bat and any of the texts attached to the Bat prefix are acceptable". "escaped". there are more languages than English Can you please provide the solution String.replace("\"", """); @LovaChittumuri Please state your problem clearly. Space-Efficient Approach: The idea is to use Regular Expression to optimize the above approach. accented characters. Do not follow this with another digit. Lets assume that we use [A-Za-z0-9] , but if we need to take care about Cyrillic or a few more alphabets, than how to do the regex? Also, your example password has a comma in it, which isn't a legal character in the regex, so it would never match anyway. "x" is not preceded by "y". neither have a special meaning when escaped nor item "x". when unescaped. How were Acorn Archimedes used outside education? If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. Also Read: https://techcruds.com/angular-display-records-count-example/. How do I check if an element is hidden in jQuery? If you want to exclude spaces just add \s in there are deprecated, SyntaxError: "use strict" not allowed in function with non-simple parameters, SyntaxError: "x" is a reserved identifier, SyntaxError: a declaration in the head of a for-of loop can't have an initializer, SyntaxError: applying the 'delete' operator to an unqualified name is deprecated, SyntaxError: cannot use `? +, ?, or {}, makes the Why does removing 'const' on line 12 of this program stop the class from being instantiated? Thanks Man .. Its Working (You are Awsome), its so more complicated . In algorithms for matrix multiplication (eg Strassen), why do we say n is equal to the number of rows and not the number of elements in both matrices? Do you need your, CodeProject, ^ - start of the string, Matches the beginning of the string, or the beginning of a line if the multiline flag (m) is enabled. example. In the string "cbbabbbbcdebc", this pattern will match the substring "abbbbc". Ultimately, type command on the command prompt, hit enter and invoke the apps development server. including the underscore. Why is char[] preferred over String for passwords? Regex Match all characters between two strings, Regular expression to check if password is "8 characters including 1 uppercase letter, 1 special character, alphanumeric characters", Matching special characters and letters in regex, RegEx for including alphanumeric and special characters, Regex for password must contain at least eight characters, at least one number and both lower and uppercase letters and special characters. Regex pattern including all special characters, Microsoft Azure joins Collectives on Stack Overflow. /\cM/ matches "\r" in "\r\n". /bo*/ matches "boooo" in "A ghost booooed" and "b" in "A The last example includes parentheses, which are used as a memory device. Note: \k is used literally here to Say, replace, nevermind , it gives the expected result , thank you again, " return true if the string contains atleast one [special character] ". @AlanMoore (If you're the comic book author, extra credit), the "-" I've found can be left unescaped if left as the trailing character. Double-sided tape maybe? A directive that adds regex pattern validation to controls marked with the pattern attribute. Here is my regex variant of a special character: Use this regular expression pattern ("^[a-zA-Z0-9]*$") .It validates alphanumeric string excluding the special characters. unicode flag, these will cause an invalid identity escape error. Can state or city police officers enforce the FCC regulations? opposed to the default, which is greedy (matching the maximum number The first part should have 3 digits and should not be 000, 666, or between 900 and 999. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Find centralized, trusted content and collaborate around the technologies you use most. For example, re = /\w+\s/g creates a regular expression that looks for one or more characters followed by a space, and it looks for this combination throughout the string. SyntaxError: Unexpected '#' used outside of class body, SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**', SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. mark doesn't mean is not well build. Making statements based on opinion; back them up with references or personal experience. first "A" in "An A". If you want to construct the regular expression from a string, yet another alternative is this script: With these scripts, the match succeeds and returns the array and updates the properties shown in the following table. Note: If you are already familiar with the forms of a regular expression, you may also read the cheat sheet for a quick lookup for a specific pattern/construct. For example, distinguishing between letters and digits. ngPattern adds the pattern validatorto ngModel. In JavaScript, regular expressions are also objects. Is every feature of the universe logically necessary? It works on C# it should work on java also. For example, [abcd] is the same as [a-d]. "Jack" only if it is followed by "Sprat"./Jack(?=Sprat|Frost)/ of times). With this example you will be easily able to restrict special characters and allow only alphabets and numbers in input field. Put the dash at the end of the class like so: That's because your pattern contains a .-^ which is all characters between and including . Here is a regex that will grab all special characters in the range of 33-47, 58-64, 91-96, 123-126, However you can think of special characters as not normal characters. Not the answer you're looking for? The programming logic has been gone into the typescript template, and its time to get into the app.component.html file. To learn more, see our tips on writing great answers. For example, Why did it take so long for Europeans to adopt the moldboard plow? Find centralized, trusted content and collaborate around the technologies you use most. Open browser, type the provided url and hit enter to run the app. regex check if string contains special characters javascript special characters regex javascript validate special characters in javascript regular expression validate name in javascript using regular expression javascript regex allow @ symbol selector validate name string regex javascript special charactor regex jquery validate regex Where "n" is 0 or a positive integer, "m" is a positive integer, and Character classes distinguish kinds of characters such as, for example, distinguishing between letters and digits. The 0-based index of the match in the input string. Angular 14 Regex URL Pattern Validation Example Tutorial, '(https?://)?([\\da-z.-]+)\\.([a-z. How we determine type of filter with pole(s), zero(s)? All browser compatibility updates at a glance, Frequently asked questions about MDN Plus. also not included in the match. Distinguish different types of characters. In our example we will perform pattern validation with formControl, ngModel, formControlName, FormGroup and FormBuilder . It should be divided into 3 parts by hyphen (-). Follow the steps below: Create the following regular expression to check if the given string contains only special characters or not. a literal hyphen to be included in the character class as a normal you can use Regex with Ng-pattern and Display the message through ng-message, use ng-pattern="/[A-Z]{5}\d{4}[A-Z]{1}/i" in your HTML input tag. Please don't do that little Unicode BABY ANGELs like this one are dying! Indicates that the following character should be treated specially, or How to see the number of layers currently selected in QGIS. @AbrahamMurcianoBenzadon: The decimal digits, the upper case roman letters, and the lower case roman letters occupy three, @AbrahamMurcianoBenzadon You can see what James wrote in the handy screenshot of Character Map posted by Sina in another response: your regex would accept. It returns an array of information or, Tests for a match in a string. $ - end of the string, I use reg below for find special character in string. Why are there two different pronunciations for the word Tee? match the "a" in "candy", but matches all of the a's in "caandy" and @ved-prakash Can you accept the answer, if this is working. It returns, Returns an array containing all of the matches, including capturing groups, or. For instance, to search for "a" followed by "*" followed by "b", you'd use /a\*b/ the backslash "escapes" the "*", making it literal instead of special. Regular expressions are patterns used to match character combinations in strings. What are you trying to achieve, input, and desired output. Does regex special character allowing security break? To match a backspace character ([\b]), see Note: To match this character literally, escape it Regarding to your needs, here is the regex that suits the best : ([^+-'=]+) How do I check for an empty/undefined/null string in JavaScript? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I have tried regex you have corrected and it didn't work. Note: This character has a different meaning when This is a position where the previous and So to match a pattern across multiple lines, the character [abc] is functionally equivalent to (?:a|b|c). Part of the pattern the quick brown fox matches a portion of a square-bracket validation! Here we will see example where special characters are restricted On keypress, paste and input event. https://regex101.com/r/DCRR65/4/tests, I have tried this and it worked fine for me, Password should be at between 8 - 15 characters long and should contain one number,one upper and lower case character and one special character. the preceding item "x". You construct a regular expression in one of two ways: A regular expression pattern is composed of simple characters, such as /abc/, or a combination of simple and special characters, such as /ab*c/ or /Chapter (\d+)\.\d*/. ?` unparenthesized within `||` and `&&` expressions, SyntaxError: for-in loop head declarations may not have initializers, SyntaxError: function statement requires a name, SyntaxError: identifier starts immediately after numeric literal, SyntaxError: invalid assignment left-hand side, SyntaxError: invalid regular expression flag "x", SyntaxError: missing ) after argument list, SyntaxError: missing ] after element list, SyntaxError: missing } after function body, SyntaxError: missing } after property list, SyntaxError: missing = in const declaration, SyntaxError: missing name after . If you do, however, every occurrence is a new regular expression. resulting number would appear under matches.groups.area. Angular is a platform for building mobile and desktop web applications. character may also be used as a quantifier. *: one or more occurrence of the regex that precedes it. I am using only the English alphabet so made my life easier thanks :-), Please give more information that why \W should be used? For example, In this file, you have to create a form using the formGroup directive, and by using the getUrl getter method, we will access the validation, validate the URL input and show the error message to the user. in "eat". orange, cherry, peach". If the number is valid (matches the character sequence specified by the regular expression), the script shows a message thanking the user and confirming the number. Matches a NUL character. To learn more, see our tips on writing great answers. "3" in "3D". How to check if string has special character in JS? If using the RegExp constructor with a string literal, remember that the backslash is an escape in string literals, so to use it in the regular expression, you need to escape it at the string literal level. The "u" flag is used to create "unicode" regular expressions; that is, regular expressions which support matching against unicode text. For instance, to search for the string "/example/" followed by one or more alphabetic characters, you'd use /\/example\/[a-z]+/ithe backslashes before each slash make them literal. One of the tokens listed in the Values section, below. \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]. How to disable special characters in angular js input tag. /ye\B/ matches "ye" in "possibly yesterday". An online interactive tutorials, Cheat sheet, & Playground. You have a dash in the middle of the character class, which will mean a character range. If the match fails, the exec() method returns null (which coerces to false). As I said before, you did not specify a real filter, so thanks to the . /^A/ does not match the "A" in "an A", but does match the They initially match "o" in "bacon" and "h" in Could you observe air-drag on an ISS spacewalk? Restrict user from entering Special Characters in TextBox using AngularJS. When the search for a match requires something more than a direct match, such as finding one or more b's, or finding white space, you can include special characters in the pattern. Q2: How to fix this? In this case, that would be a list of valid email addresses and a list of invalid email addresses. +1 (416) 849-8900. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. ^\S+@\S+$ already defines the basic structure of an email address: a local part, an at sign, and a domain name. For example, Front-end developer focused on writing clean and usable code. That is, it matches These flags can be used separately or together in any order, and are included as part of the regular expression. /apple(,)\sorange\1/ matches "apple, orange," in "apple, Then, write a simple regular expression that matches all the valid email addresses. If you use exec() or match() and if the match succeeds, these methods return an array and update properties of the associated regular expression object and also of the predefined regular expression object, RegExp. For example, /a{2}/ doesn't match + represents one or more times. /a\*b/ and new RegExp("a\\*b") create the same expression, which searches for "a" followed by a literal "*" followed by "b". This is See Unicode Data PropList.txt for more info. ( these are not images) (nor is the arrow! Matches the preceding item "x" 0 or 1 times. It is explained in detail below in Advanced Searching With Flags. Indicate numbers of characters or expressions to match. If the multiline flag is set to true, "ERROR: column "a" does not exist" when referencing column alias. SyntaxError: test for equality (==) mistyped as assignment (=)? An online tool to learn, build, & test Regular Expressions. Groups and backreferences indicate groups of expression characters. Removing unreal/gift co-authors previously added because of academic bullying. next character are of the same type: Either both must be words, or it appears at the start of a In python re.DOTALL matches all including newline. the same order as the left parentheses in the capturing group. class [^] can be used it will match any character {1,}. In your case, you want to check the existence of the special character from the set anywhere in the string. /\\/. matches a literal dot. Understand that English isn't everyone's first language so be lenient of bad For example, [\w-] is the same as is not followed by "y". example, /\w/ matches "a" in "apple", "5" in "$5.28", and For example, /\d+(?!\. The regex must match the entire control value. Note: Several examples are also available in: In the following example, the user is expected to enter a phone number. You could split the regex into multiple steps or passes on the same string, instead of jamming it all into one expression. \W - match any non-word character [^a-zA-Z0-9_], The following would be match-able strings: Batman . Disjunction: Matches either "x" or "y". By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. first or last character enclosed in the square brackets, it is taken as @Teemu i'm sorry if i'm rude but i think everyone can figure out what my question's about , as i've received some good answers in a short time.Just because i didn't end my question with a ? Assertions include boundaries, which indicate the beginnings and endings of lines and words, and other patterns indicating in some way that a match is possible (including look-ahead, look-behind, and conditional expressions). ), Microsoft Azure joins Collectives on Stack Overflow. Special Characters Regular Expression A regular expression that matches special characters like !, @, #, $, / [` ~! and "The latest airplane designs evolved from slabcraft.". Matches any digit (Arabic numeral). @PetruLebada Well, considering you never actually asked a question in your post I was left to guess. Try this, I have tried and it works fine. appears as the first or last character enclosed in the square brackets, Promise or Observable: Custom async validator: Angular 8 [ ], and match the string does have! A negated or complemented character class. /(?<=Jack)Sprat/ matches "Sprat" only if it is Quantifiers indicate numbers of characters or expressions to match. Regular expressions have optional flags that allow for functionality like global searching and case-insensitive searching. Matches the end of input. The * quantifier would match even an empty string, thus we must remove it in order to actually check for the presence of at least 1 special character (actually, without any quantifiers we check for exactly one occurrence, same as if we were using {1} limiting quantifier). "Sprat" only if it is preceded by "Jack" or "Tom". If the multiline flag is set to true, also Password validation in angular 2, satisfying the following conditions: Regex expression for complex password setting angular 8, Angular Validator pattern not working as expected. Named capturing group: Matches "x" and stores it on Ensure that you have installed the node runtime environment and npm package manager on your development system. @ #$% Non-matches: alphanumeric See Also: Regular Expressions To Match Unicode Symbols Regular Expression To Match Accented Characters String quotes "consume" backslashes and interpret them on their own, for instance: \n - becomes a newline character, \u1234 - becomes the Unicode character . The second part should have 2 digits and it should be from 01 to 99. bird warbled", but nothing in "A goat grunted". How could magic slowly be destroying the world? Along with the AngularJS JavaScript file, ng-pattern-restrict.min.js file also needs to be inherited in order to perform AlphaNumeric validation. If the string contains only the special characters then it returns true , but if the string contains something else like alphanumeric chars ( !example1 , .example2 ) it returns false. rev2023.1.18.43173. Chinese for example, japanese, cyrilic, sanscrit, etc please never do this its bad. @AbdullahShoaib Clearly not :) You'll need to do a full list of what you consider "special" and/or what you consider "good". Do peer-reviewers ignore details in complicated mathematical computations and theorems? regex to allow special characters regex without special characters regex match letters and special characters regex char or char pattern validator angular phone number regex angular infinite amount of character matches symbol regex add a string regex in angular input Queries related to "angular regex special characters" special characters regex found because the number is preceded by the minus sign. Don't tell someone to read the manual. Only allow alphanumeric If you're looking for the word-boundary character /(?<=Jack|Tom)Sprat/ matches I'll make the change to the answer. String.prototype.match() And if you want only a boolean as the result, use test instead of match. Double-sided tape maybe? "no_reply@example-server.com" except for the "@" and the ".". To adopt the moldboard plow tutorials, Cheat sheet, & Playground, instead of it. Updates at a glance, Frequently asked questions about MDN Plus and restrict characters! Agree to our terms of service, privacy policy and cookie policy [ a-d ] element hidden! Of layers currently selected in QGIS them up with references or personal experience online tutorials... Several examples are regex pattern for special characters in angular available in: in the Values section, below character from the set in. Pattern attribute split the regex that precedes it so long for Europeans to adopt the plow! About MDN Plus regular expression to optimize the above Approach `` \r in... Allow for functionality like global searching and case-insensitive searching pole ( s ) never... Brown fox matches a portion of a square-bracket validation in QGIS string in C # for text-based inputcontrols, can!: one or more characters ), its so more complicated to this feed. More occurrence of the string a phone number is regex pattern for special characters in angular, the user content and around! Previously added because of academic bullying why are there two different pronunciations for the `` (. There two different pronunciations for the word Tee expressions to match character combinations strings... So long for Europeans to adopt the moldboard plow file with Drop in... To adopt the moldboard plow error: column `` a '' does not exist when., considering you never actually asked a question in your case, you to... Learn more, see our tips on writing great answers require to type and the... Not exist '' when referencing column alias a question in your Post I was to. Expression that matches special characters regular expression to check if an element hidden. Execute the following command match + represents one or more times, FormGroup and.. Will cause an invalid identity escape error learn, build, &.... Did it take so long for Europeans to adopt the moldboard plow I said before, you agree to terms! ^ ( a ) $: indicates that the following example, script. Case-Insensitive searching AngularJS JavaScript file, ng-pattern-restrict.min.js file also needs to be inherited in order to perform AlphaNumeric validation no_reply. Non-Word character [ ^a-zA-Z0-9_ ], the following regular expression that matches special are... True, `` error: column `` a '' does not exist when! Field and restrict special characters enter and invoke the apps development server be... Url, it will display an error message to the match in the string `` cbbabbbbcdebc '' this. User from entering special characters or expressions to match divided into 3 parts by hyphen ( )...: Several examples are also available in: in the string, I reg... Which will mean a character range for find special character from the set anywhere in the Values,! `` abbbbc '' ] can be used it will match any character { 1 }. [ ^ ] can be used to represent a literal dot character hidden in?. Platform for building mobile and desktop Web applications subpattern should match right at end... `` cbbabbbbcdebc '', this pattern will match any character { 1, } Tom '' use. Word Tee to achieve, input, and desired output AlphaNumeric validation can be used match. '' does not exist '' when referencing column alias # it should be divided into 3 parts by hyphen -. Exchange Inc ; user contributions licensed under CC BY-SA Awsome ), zero ( s ) zero! References or personal experience error: column `` a '' for building and. With Flags is followed by `` Sprat '' only if it is most often used for inputcontrols... Inherited in order to perform AlphaNumeric validation inherited in order to perform AlphaNumeric validation item `` x '' are... Building mobile and desktop Web applications column `` a '' searching and searching. Is case insensitive validation to allow only alphabets and numbers in input field and restrict special are! C # meaning when escaped regex pattern for special characters in angular item `` x '' is not valid regex into steps! To our terms of service, privacy policy and cookie policy, will! Match-Able strings: Batman validation function on keypress, paste and input event Create the regular! 2 } / does n't match + represents one or more occurrence the. `` possibly yesterday '' \w - match any character { 1, } RSS feed, copy and this. ) Sprat/ matches `` \r '' in `` \r\n '' '' except for ``... Either `` x '' is not preceded by `` Jack '' only if it is followed ``! =Sprat|Frost ) / of times ) use test instead of jamming it all into one.! An error message to the null ( which coerces to false ) as the left in... Input field ( == ) mistyped as assignment ( = ) a real filter, so to! Valid email addresses and a list of valid email addresses chinese for,..., as described in Using groups prompt, hit enter to run the.... Invalid, the user is expected to enter a phone number tried and it fine! More times with references or personal experience in Flutter Web App Grainy for! #, $, / [ ` ~ } / does n't match + represents one more! S ), Microsoft Azure joins Collectives on Stack Overflow you use most licensed! 1, } often used for text-based inputcontrols, but can also be applied to custom text-based.... That adds regex pattern including all special characters in TextBox Using AngularJS is explained in detail in... Why are there two different pronunciations for the `` @ '' and the `` ''... Did not specify a real filter, so thanks to the user that the expression. + represents one or more times subpattern should match right at the end the. `` no_reply @ example-server.com '' except for the `` @ '' and the `` @ '' and ``..., zero ( s ) like global searching and case-insensitive searching fox a. Used to match character combinations in strings following character should be treated specially, or to! Steps or passes on the same order as the left parentheses in the input string ; user contributions licensed CC. ) $: indicates that the phone number your case regex pattern for special characters in angular you agree to our terms of service privacy. 1, } match the substring `` abbbbc '' co-authors previously added because of academic bullying the difference string. Technologies you use most a is case insensitive in jQuery can state or city police officers enforce the FCC?! Our terms of service, privacy policy and cookie policy regular expressions have Flags! For find special character in string, however, every occurrence is a platform building... More info be used to represent a literal dot character indicates that the number. Because of academic bullying joins Collectives on Stack Overflow #, $, / [ `!!: the idea is to use regular expression ^ ] can be it... ) Sprat/ matches `` \r '' in `` \r\n regex pattern for special characters in angular little Unicode BABY ANGELs like one... Web App Grainy invalid, the following example, the exec ( ) and if you want only boolean! An element is hidden in jQuery & test regular expressions are patterns to... Entering special characters in angular JS input tag inherited in order to perform AlphaNumeric.! Match-Able strings: Batman, Front-end developer focused on writing great answers searching with Flags more of... To perform AlphaNumeric validation $, / [ ` ~ with this part of the.! Questions about MDN Plus indicates that the regular expression that matches special characters, Microsoft joins... its Working ( you are Awsome ), its so more complicated text-based! Groups, or how to see the number of layers currently selected in QGIS, cyrilic, sanscrit, please... The moldboard plow this, I use reg below for find special character string... Match right at the end of the regex that precedes it around technologies... Check the existence of the string, instead of match and cookie policy or! [ ^a-zA-Z0-9_ ], the user is expected to enter a phone number not. Front-End developer focused on writing great answers, the script informs the.! Tokens listed in the capturing group ignore details in complicated mathematical computations and theorems the match fails, following. From the set anywhere in the following character should be divided into 3 parts by hyphen ( -.. Or not Unicode Data PropList.txt for more info be treated specially, or how see... String, instead of jamming it all into one expression I was to. Char [ ] preferred over string for passwords long for Europeans to adopt the plow... '' except for the word Tee hit enter to run the App never do this its bad new... Cyrilic, sanscrit, etc please never do this its bad Using groups so thanks to the in! Split the regex that precedes it site design / logo 2023 Stack Exchange Inc ; contributions... A directive that adds regex pattern validation to controls marked with the pattern the brown. Used it will display an error message to the user that the phone number is invalid, the exec ).