Angular 4 Getting values from checkboxes
I am new to angular and am stuck with this rather simple problem. I am getting data from a web service to show a couple of checkboxes. I need a way to get the value of all checkboxes selected by the user. I am using material theme.
<span *ngFor="let x of maintainanceTypeList">
<md-checkbox
name="{{x.maintenancetype}}"
value="{{x.maintenancetype}}"
[formControl]="CreateSocietyForm.controls['checkMaintainanceType']">
{{x.maintenancetype}}
</md-checkbox>
</span>
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You can add event change
to md-checkbox
and pass the function object. Maintain array
which keeps track of which ones got checked
and unchecked
, and update the array accordingly.
HTML:
<span *ngFor="let x of maintainanceTypeList">
<md-checkbox
name="{{x.maintenancetype}}"
value="{{x.maintenancetype}}"
(change)="change($event, x)">
{{x.maintenancetype}}
</md-checkbox>
</span>
<p> Selected value: {{selectedValue | json}} </p>
component.ts:
export class SelectFormExample {
selectedValue = [];
maintainanceTypeList = [
{maintenancetype: 'Steak'},
{maintenancetype: 'Pizza'},
{maintenancetype: 'Tacos'}
];
change(e, type){
console.log(e.checked);
console.log(type);
if(e.checked){
this.selectedValue.push(type);
}
else{
let updateItem = this.selectedValue.find(this.findIndexToUpdate, type.maintenancetype));
let index = this.selectedValue.indexOf(updateItem);
this.selectedValue.splice(index, 1);
}
}
findIndexToUpdate(type) {
return type.maintenancetype === this;
}
}
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e.checked
You can use the following instead :
Working example
<input class="form-check-input" type="checkbox" (change)="selectBadge($event, badge._id)"> <span class="badge badge-pill {{badge.color}}">{{badge.text}}</span>
selectBadge (e, id) {
if (e.target.checked) {
this.product.badges.push(id);
} else {
this.product.badges.splice(this.product.badges.indexOf(id), 1);
}}
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