Regex pattern in Typescript
up vote
1
down vote
favorite
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
add a comment |
up vote
1
down vote
favorite
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
1
Usepattern="^(?![aA]d{6}$).*"
– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
496
1
Usepattern="^(?![aA]d{6}$).*"
– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
add a comment |
1
Usepattern="^(?![aA]d{6}$).*"
– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
1
1
Use
pattern="^(?![aA]d{6}$).*"– Wiktor Stribiżew
Nov 22 at 10:49
Use
pattern="^(?![aA]d{6}$).*"– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, and to write a reverse HTML5 pattern you may use
pattern="(?![aA]d{6}$).*"
This pattern will get parsed as /^(?:(?![aA]d{6}$).*)$/ pattern (with u modifier in Chrome, Firefox and other browsers supporting this feature).
The (?![Aa]d{6}$) negative lookahead will fail any string that starts with a or A and then having 6 digits to its end.
The .* matches any 0+ chars. Use .+ to match any 1 or more chars. This part is required since the HTML5 regex should match the whole input.
HTML5 demo:
input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53429232%2fregex-pattern-in-typescript%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, and to write a reverse HTML5 pattern you may use
pattern="(?![aA]d{6}$).*"
This pattern will get parsed as /^(?:(?![aA]d{6}$).*)$/ pattern (with u modifier in Chrome, Firefox and other browsers supporting this feature).
The (?![Aa]d{6}$) negative lookahead will fail any string that starts with a or A and then having 6 digits to its end.
The .* matches any 0+ chars. Use .+ to match any 1 or more chars. This part is required since the HTML5 regex should match the whole input.
HTML5 demo:
input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
add a comment |
up vote
0
down vote
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, and to write a reverse HTML5 pattern you may use
pattern="(?![aA]d{6}$).*"
This pattern will get parsed as /^(?:(?![aA]d{6}$).*)$/ pattern (with u modifier in Chrome, Firefox and other browsers supporting this feature).
The (?![Aa]d{6}$) negative lookahead will fail any string that starts with a or A and then having 6 digits to its end.
The .* matches any 0+ chars. Use .+ to match any 1 or more chars. This part is required since the HTML5 regex should match the whole input.
HTML5 demo:
input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
add a comment |
up vote
0
down vote
up vote
0
down vote
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, and to write a reverse HTML5 pattern you may use
pattern="(?![aA]d{6}$).*"
This pattern will get parsed as /^(?:(?![aA]d{6}$).*)$/ pattern (with u modifier in Chrome, Firefox and other browsers supporting this feature).
The (?![Aa]d{6}$) negative lookahead will fail any string that starts with a or A and then having 6 digits to its end.
The .* matches any 0+ chars. Use .+ to match any 1 or more chars. This part is required since the HTML5 regex should match the whole input.
HTML5 demo:
input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, and to write a reverse HTML5 pattern you may use
pattern="(?![aA]d{6}$).*"
This pattern will get parsed as /^(?:(?![aA]d{6}$).*)$/ pattern (with u modifier in Chrome, Firefox and other browsers supporting this feature).
The (?![Aa]d{6}$) negative lookahead will fail any string that starts with a or A and then having 6 digits to its end.
The .* matches any 0+ chars. Use .+ to match any 1 or more chars. This part is required since the HTML5 regex should match the whole input.
HTML5 demo:
input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>input:valid {
color: black;
border: 5px solid #dadadada;
border-radius: 7px;
}
input:invalid {
color: navy;
outline: none;
border-color: #ff1050;
box-shadow: 0 0 10px #ff0000;
}<form name="form1">
<input pattern="(?![aA]d{6}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
edited Nov 22 at 11:31
answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
answered Nov 22 at 10:58
Wiktor Stribiżew
305k16124201
305k16124201
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53429232%2fregex-pattern-in-typescript%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
Use
pattern="^(?![aA]d{6}$).*"– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54