Mixing
Angular ngIf formGroup
I have a form on Angular that allows to display an input according to the value selected in a drop-down list.
Here is an example of my code:
(If two is selected an input appears)
https://stackblitz.com/edit/angular-fqkfyx
If I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
My html:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select [(ngModel)]="selectedOption" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="selectedOption == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
My component.ts:
import { Component, OnInit } from '@angular/core';
import { FormGroup, FormBuilder } from '@angular/forms';
@Component({
selector: 'app-create-us',
templateUrl: './create-us.component.html',
styleUrls: ['./create-us.component.css']
})
export class CreateUsComponent implements OnInit {
public usForm: FormGroup;
public selectedOption: string;
constructor(private fb: FormBuilder) {
}
ngOnInit() {
this.createForm();
}
createForm() {
this.usForm = this.fb.group({
'type': [null, ],
'appears': [null, ],
});
}
options = [
{ name: 'first', value: 1 },
{ name: 'two', value: 2 }
];
}
I simplified my problem as much as in reality it is in a large form with a dozen input
I need your help, thanks in advance
Regards,
Valentin
html angular forms typescript ngif
asked Nov 19 '18 at 13:37
Valentin
296
add a comment |
I have a form on Angular that allows to display an input according to the value selected in a drop-down list.
Here is an example of my code:
(If two is selected an input appears)
https://stackblitz.com/edit/angular-fqkfyx
If I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
My html:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select [(ngModel)]="selectedOption" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="selectedOption == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
My component.ts:
import { Component, OnInit } from '@angular/core';
import { FormGroup, FormBuilder } from '@angular/forms';
@Component({
selector: 'app-create-us',
templateUrl: './create-us.component.html',
styleUrls: ['./create-us.component.css']
})
export class CreateUsComponent implements OnInit {
public usForm: FormGroup;
public selectedOption: string;
constructor(private fb: FormBuilder) {
}
ngOnInit() {
this.createForm();
}
createForm() {
this.usForm = this.fb.group({
'type': [null, ],
'appears': [null, ],
});
}
options = [
{ name: 'first', value: 1 },
{ name: 'two', value: 2 }
];
}
I simplified my problem as much as in reality it is in a large form with a dozen input
I need your help, thanks in advance
Regards,
Valentin
html angular forms typescript ngif
asked Nov 19 '18 at 13:37
Valentin
296
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50
add a comment |
I have a form on Angular that allows to display an input according to the value selected in a drop-down list.
Here is an example of my code:
(If two is selected an input appears)
https://stackblitz.com/edit/angular-fqkfyx
If I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
My html:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select [(ngModel)]="selectedOption" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="selectedOption == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
My component.ts:
import { Component, OnInit } from '@angular/core';
import { FormGroup, FormBuilder } from '@angular/forms';
@Component({
selector: 'app-create-us',
templateUrl: './create-us.component.html',
styleUrls: ['./create-us.component.css']
})
export class CreateUsComponent implements OnInit {
public usForm: FormGroup;
public selectedOption: string;
constructor(private fb: FormBuilder) {
}
ngOnInit() {
this.createForm();
}
createForm() {
this.usForm = this.fb.group({
'type': [null, ],
'appears': [null, ],
});
}
options = [
{ name: 'first', value: 1 },
{ name: 'two', value: 2 }
];
}
I simplified my problem as much as in reality it is in a large form with a dozen input
I need your help, thanks in advance
Regards,
Valentin
html angular forms typescript ngif
asked Nov 19 '18 at 13:37
Valentin
296
I have a form on Angular that allows to display an input according to the value selected in a drop-down list.
Here is an example of my code:
(If two is selected an input appears)
https://stackblitz.com/edit/angular-fqkfyx
If I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
My html:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select [(ngModel)]="selectedOption" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="selectedOption == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
My component.ts:
import { Component, OnInit } from '@angular/core';
import { FormGroup, FormBuilder } from '@angular/forms';
@Component({
selector: 'app-create-us',
templateUrl: './create-us.component.html',
styleUrls: ['./create-us.component.css']
})
export class CreateUsComponent implements OnInit {
public usForm: FormGroup;
public selectedOption: string;
constructor(private fb: FormBuilder) {
}
ngOnInit() {
this.createForm();
}
createForm() {
this.usForm = this.fb.group({
'type': [null, ],
'appears': [null, ],
});
}
options = [
{ name: 'first', value: 1 },
{ name: 'two', value: 2 }
];
}
I simplified my problem as much as in reality it is in a large form with a dozen input
I need your help, thanks in advance
Regards,
Valentin
html angular forms typescript ngif
html angular forms typescript ngif
asked Nov 19 '18 at 13:37
Valentin
296
asked Nov 19 '18 at 13:37
Valentin
296
edited Nov 19 '18 at 13:50
asked Nov 19 '18 at 13:37
Valentin
296
asked Nov 19 '18 at 13:37
Valentin
296
asked Nov 19 '18 at 13:37
Valentin
296
296
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50
add a comment |
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50
add a comment |
2 Answers
2
active
oldest
votes
You should be using formControlName instead of [(ngModel)].
And then in comparison, you should be comparing to usForm.value.type instead of the selectedValue.
Give this a try:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select formControlName="type" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="usForm.value.type == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
Here's a Sample StackBlitz for your ref.
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
add a comment |
Your template is loaded before form group is created. Add ngIf to wail while form group will be created:
<div class="offset-md-2" *ngIf="usForm">
<form [formGroup]="usForm">
answered Nov 19 '18 at 13:44
alexey28
4,19511221
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
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',
autoActivateHeartbeat: false,
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%2f53375838%2fangular-ngif-formgroup%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You should be using formControlName instead of [(ngModel)].
And then in comparison, you should be comparing to usForm.value.type instead of the selectedValue.
Give this a try:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select formControlName="type" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="usForm.value.type == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
Here's a Sample StackBlitz for your ref.
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
add a comment |
You should be using formControlName instead of [(ngModel)].
And then in comparison, you should be comparing to usForm.value.type instead of the selectedValue.
Give this a try:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select formControlName="type" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="usForm.value.type == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
Here's a Sample StackBlitz for your ref.
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
add a comment |
You should be using formControlName instead of [(ngModel)].
And then in comparison, you should be comparing to usForm.value.type instead of the selectedValue.
Give this a try:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select formControlName="type" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="usForm.value.type == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
Here's a Sample StackBlitz for your ref.
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
You should be using formControlName instead of [(ngModel)].
And then in comparison, you should be comparing to usForm.value.type instead of the selectedValue.
Give this a try:
<div class="offset-md-2">
<form [formGroup]="usForm">
<div class="div-champs">
<p id="champs">Type
<span id="required">*</span>
</p>
<div class="select-style ">
<select formControlName="type" name="type">
<option style="display:none">
<option [value]="o.name" *ngFor="let o of options">
{{o.name}}
</option>
</select>
</div>
</div>
<p id="champs" *ngIf="usForm.value.type == 'two'">Appears
<input type="appears" class="form-control" name="appears">
</p>
</form>
</div>
Here's a Sample StackBlitz for your ref.
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
answered Nov 19 '18 at 13:51
SiddAjmera
13k31137
13k31137
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
add a comment |
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
Thank you very much it works! I will look at the code;)Thank you very much it works! I will look at the code;)
– Valentin
Nov 19 '18 at 13:54
add a comment |
Your template is loaded before form group is created. Add ngIf to wail while form group will be created:
<div class="offset-md-2" *ngIf="usForm">
<form [formGroup]="usForm">
answered Nov 19 '18 at 13:44
alexey28
4,19511221
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
add a comment |
Your template is loaded before form group is created. Add ngIf to wail while form group will be created:
<div class="offset-md-2" *ngIf="usForm">
<form [formGroup]="usForm">
answered Nov 19 '18 at 13:44
alexey28
4,19511221
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
add a comment |
Your template is loaded before form group is created. Add ngIf to wail while form group will be created:
<div class="offset-md-2" *ngIf="usForm">
<form [formGroup]="usForm">
answered Nov 19 '18 at 13:44
alexey28
4,19511221
Your template is loaded before form group is created. Add ngIf to wail while form group will be created:
<div class="offset-md-2" *ngIf="usForm">
<form [formGroup]="usForm">
answered Nov 19 '18 at 13:44
alexey28
4,19511221
answered Nov 19 '18 at 13:44
alexey28
4,19511221
answered Nov 19 '18 at 13:44
alexey28
4,19511221
answered Nov 19 '18 at 13:44
alexey28
4,19511221
4,19511221
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
add a comment |
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
that never really happens you know.
– SiddAjmera
Nov 19 '18 at 13:46
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
I just tried but it does not work. Thank you for your help, I continue my research
– Valentin
Nov 19 '18 at 13:47
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%2f53375838%2fangular-ngif-formgroup%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
I didn't quite understand what you meant in line "It does not work if I leave [formGroup] = "usForm" of my form tag. Because the ngIf is not executed"
– SiddAjmera
Nov 19 '18 at 13:39
Thank you for your answer. Bad if I leave the [formGroup] = "usForm" the input display does not work. On the other hand if I delete [formGroup] = "usForm" of the tag form my code works as I want. So the problem is related to [formGroup] = "usForm"
– Valentin
Nov 19 '18 at 13:44
Duplicate of (stackoverflow.com/questions/39152071/…)? The rest of the code may be of good use
– Nuno
Nov 19 '18 at 13:48
@Nuno Thank you for your answer, I also came across this question but it does not answer my problem
– Valentin
Nov 19 '18 at 13:50