Regex pattern in Typescript
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 |
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}$).*"
– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
add a comment |
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
This pattern works, but it the opposite way than I intended, how do I change it so when I the pattern is matched, it causes an error? Thanks.
<mat-form-field style="text-align: center">
<input type="text" pattern="^([aA]d{6})" placeholder="id" matInput="text" formControlName="id"
name="id" required>
</mat-form-field>
regex typescript pattern-matching angular2-forms
regex typescript pattern-matching angular2-forms
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
asked Nov 22 at 10:48
Katie Kennedy
496
496
1
Usepattern="^(?![aA]d{6}$).*"
– 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}$).*"– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54
add a comment |
1 Answer
1
active
oldest
votes
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, 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}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
add a comment |
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1 Answer
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1 Answer
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active
oldest
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votes
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, 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}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
add a comment |
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, 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}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
add a comment |
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, 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}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
Your current pattern matches a string that starts with a or A and then has strictly 6 digits. The ^ is redundant in pattern regex since it is anchored by default.
So, in fact, the current regex is ^[Aa]d{6}$, 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}$).*" title="Please enter a valid string." placeholder="Please enter valid text" />
<input type="Submit"/>
</form>answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
edited Nov 22 at 11:31
answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
answered Nov 22 at 10:58
Wiktor Stribiżew
307k16126202
307k16126202
add a comment |
add a comment |
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1
Use
pattern="^(?![aA]d{6}$).*"– Wiktor Stribiżew
Nov 22 at 10:49
@WiktorStribiżew thank you, this works.
– Katie Kennedy
Nov 22 at 10:54