Dynamically show / hide a component if its date is not between 2 other dates












0















I have two inputs: <input type="date" id="fromDate"> and <input type="date" id="toDate">, and then a *ngFor loop iterating through a list of items. All of these items have a property activity_date.



I want to be able to only show the components having their activity_date property between the dates of fromDate and toDate. For this, I am using MomentJS, more precisely the function moment(activity_date).isBetween(fromDate, toDate).



The problem here is I want to assign the result of the previous method to a [hidden] attribute so if an input is changed, the [hidden] property will be updated.



But here's the catch. How can I do to show / hide the components whenever the inputs are changed ?



Here's what I've tried so far:



view.component.html



<app-events
type="calendar-item"
[hidden]="moment(item.activity_date).isBetween(this.fromDate, this.toDate);"
[data]="item"
></app-events>


view.component.ts



import { Component, OnInit } from "@angular/core";
import * as moment from "moment";

@Component({
selector: "app-view",
templateUrl: "./view.component.html",
styleUrls: ["./view.component.css"]
})
export class ViewComponent implements OnInit {
fromDate: string;
toDate: string;

item = [
{
id: 1,
activity_date: "14 November 2018",
}
];

ngOnInit() {}

isBetweenDate(date: string) {
return moment(date).isBetween(this.fromDate, this.toDate);
}
}


It works if I write values in the method by hand, and it only works at the loading of the page.



I was trying to look after the EventEmitter or the Custom Attributes, but I'm not sure I am moving to the right direction.










share|improve this question



























    0















    I have two inputs: <input type="date" id="fromDate"> and <input type="date" id="toDate">, and then a *ngFor loop iterating through a list of items. All of these items have a property activity_date.



    I want to be able to only show the components having their activity_date property between the dates of fromDate and toDate. For this, I am using MomentJS, more precisely the function moment(activity_date).isBetween(fromDate, toDate).



    The problem here is I want to assign the result of the previous method to a [hidden] attribute so if an input is changed, the [hidden] property will be updated.



    But here's the catch. How can I do to show / hide the components whenever the inputs are changed ?



    Here's what I've tried so far:



    view.component.html



    <app-events
    type="calendar-item"
    [hidden]="moment(item.activity_date).isBetween(this.fromDate, this.toDate);"
    [data]="item"
    ></app-events>


    view.component.ts



    import { Component, OnInit } from "@angular/core";
    import * as moment from "moment";

    @Component({
    selector: "app-view",
    templateUrl: "./view.component.html",
    styleUrls: ["./view.component.css"]
    })
    export class ViewComponent implements OnInit {
    fromDate: string;
    toDate: string;

    item = [
    {
    id: 1,
    activity_date: "14 November 2018",
    }
    ];

    ngOnInit() {}

    isBetweenDate(date: string) {
    return moment(date).isBetween(this.fromDate, this.toDate);
    }
    }


    It works if I write values in the method by hand, and it only works at the loading of the page.



    I was trying to look after the EventEmitter or the Custom Attributes, but I'm not sure I am moving to the right direction.










    share|improve this question

























      0












      0








      0








      I have two inputs: <input type="date" id="fromDate"> and <input type="date" id="toDate">, and then a *ngFor loop iterating through a list of items. All of these items have a property activity_date.



      I want to be able to only show the components having their activity_date property between the dates of fromDate and toDate. For this, I am using MomentJS, more precisely the function moment(activity_date).isBetween(fromDate, toDate).



      The problem here is I want to assign the result of the previous method to a [hidden] attribute so if an input is changed, the [hidden] property will be updated.



      But here's the catch. How can I do to show / hide the components whenever the inputs are changed ?



      Here's what I've tried so far:



      view.component.html



      <app-events
      type="calendar-item"
      [hidden]="moment(item.activity_date).isBetween(this.fromDate, this.toDate);"
      [data]="item"
      ></app-events>


      view.component.ts



      import { Component, OnInit } from "@angular/core";
      import * as moment from "moment";

      @Component({
      selector: "app-view",
      templateUrl: "./view.component.html",
      styleUrls: ["./view.component.css"]
      })
      export class ViewComponent implements OnInit {
      fromDate: string;
      toDate: string;

      item = [
      {
      id: 1,
      activity_date: "14 November 2018",
      }
      ];

      ngOnInit() {}

      isBetweenDate(date: string) {
      return moment(date).isBetween(this.fromDate, this.toDate);
      }
      }


      It works if I write values in the method by hand, and it only works at the loading of the page.



      I was trying to look after the EventEmitter or the Custom Attributes, but I'm not sure I am moving to the right direction.










      share|improve this question














      I have two inputs: <input type="date" id="fromDate"> and <input type="date" id="toDate">, and then a *ngFor loop iterating through a list of items. All of these items have a property activity_date.



      I want to be able to only show the components having their activity_date property between the dates of fromDate and toDate. For this, I am using MomentJS, more precisely the function moment(activity_date).isBetween(fromDate, toDate).



      The problem here is I want to assign the result of the previous method to a [hidden] attribute so if an input is changed, the [hidden] property will be updated.



      But here's the catch. How can I do to show / hide the components whenever the inputs are changed ?



      Here's what I've tried so far:



      view.component.html



      <app-events
      type="calendar-item"
      [hidden]="moment(item.activity_date).isBetween(this.fromDate, this.toDate);"
      [data]="item"
      ></app-events>


      view.component.ts



      import { Component, OnInit } from "@angular/core";
      import * as moment from "moment";

      @Component({
      selector: "app-view",
      templateUrl: "./view.component.html",
      styleUrls: ["./view.component.css"]
      })
      export class ViewComponent implements OnInit {
      fromDate: string;
      toDate: string;

      item = [
      {
      id: 1,
      activity_date: "14 November 2018",
      }
      ];

      ngOnInit() {}

      isBetweenDate(date: string) {
      return moment(date).isBetween(this.fromDate, this.toDate);
      }
      }


      It works if I write values in the method by hand, and it only works at the loading of the page.



      I was trying to look after the EventEmitter or the Custom Attributes, but I'm not sure I am moving to the right direction.







      javascript angular momentjs






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      asked Nov 14 '18 at 13:04









      PrototypePrototype

      52110




      52110
























          1 Answer
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          I think you have done almost right. You made isBetweenDate function but don't use it.




          I have created an example for you. It is same as your one, but not exact one. It compares the date with fromDate and toDate. So here, you can change dates and you will get an instant output based on the changed dates.



          Here is the link:



          StackBlitz Link: https://stackblitz.com/edit/angular-48bxrq






          share|improve this answer























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            1 Answer
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            active

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            votes









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            active

            oldest

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            0















            I think you have done almost right. You made isBetweenDate function but don't use it.




            I have created an example for you. It is same as your one, but not exact one. It compares the date with fromDate and toDate. So here, you can change dates and you will get an instant output based on the changed dates.



            Here is the link:



            StackBlitz Link: https://stackblitz.com/edit/angular-48bxrq






            share|improve this answer




























              0















              I think you have done almost right. You made isBetweenDate function but don't use it.




              I have created an example for you. It is same as your one, but not exact one. It compares the date with fromDate and toDate. So here, you can change dates and you will get an instant output based on the changed dates.



              Here is the link:



              StackBlitz Link: https://stackblitz.com/edit/angular-48bxrq






              share|improve this answer


























                0












                0








                0








                I think you have done almost right. You made isBetweenDate function but don't use it.




                I have created an example for you. It is same as your one, but not exact one. It compares the date with fromDate and toDate. So here, you can change dates and you will get an instant output based on the changed dates.



                Here is the link:



                StackBlitz Link: https://stackblitz.com/edit/angular-48bxrq






                share|improve this answer














                I think you have done almost right. You made isBetweenDate function but don't use it.




                I have created an example for you. It is same as your one, but not exact one. It compares the date with fromDate and toDate. So here, you can change dates and you will get an instant output based on the changed dates.



                Here is the link:



                StackBlitz Link: https://stackblitz.com/edit/angular-48bxrq







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 14 '18 at 13:33









                Surjeet BhadauriyaSurjeet Bhadauriya

                1,97211226




                1,97211226
































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