<div class="text">{{message}}</div>
private message = 'Some message';
ngOnInit() {
this.setMessageToDisplay();
}
setMessageToDisplay() {
if (this.packageService.isDocPackageEmpty) {
if(this.router.url === '/documents/todo') {
this.message = 'M1';
}
else if (this.router.url === '/documents/done') {
this.message = 'M2';
}
else if (this.imageService.isVisiblePatientDocList()) {
let pacientId = this.router.url.split("/")[2];
this.message = "M3";
}
} else {
this.message = 'Def Message';
}
return this.message;
}
}
Using {{message}} displayed intialize value of this variable despite value changed in method this.setMessageToDisplay(). I do something like this in html <div class="text">{{setMessageToDisplay()}}</div>
but method is executed few time and I want display only last value of message variable. Is possible set {{message}} in html and refresh view?
You can invoke change detection manually with ChangeDetecorRef module:
import {ChangeDetectorRef} from @angular/core
constructor(private ref:ChangeDetectorRef){}
ngOnInit() {
this.setMessageToDisplay();
this.ref.detectChanges();
}
just try this change:
<div class="text">{{message}}</div> public message = 'Some message'; ngOnInit() { this.message = this.setMessageToDisplay(); } setMessageToDisplay() { let message: string; if (this.packageService.isDocPackageEmpty) { if(this.router.url === '/documents/todo') { message = 'M1'; } else if (this.router.url === '/documents/done') { message = 'M2'; } else if (this.imageService.isVisiblePatientDocList()) { let pacientId = this.router.url.split("/")[2]; message = "M3"; } } else { message = 'Def Message'; } return message; } }
REMEMBER to set public
your message
you can use:
this.ref.detectChanges();
or:
get message() { return this.setMessageToDisplay(); }
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