I would like to compare two dates directly in the html component, with ngIf

I tried with this code, but it didn't work,

I wanted when today's date was greater than the vPromoData date not to show the contents of my div

<div *ngIf=" item.tabela.vPromo && today < item.tabela.vPromoData " >{{item.tabela.vPromoData | json}}</div>


  public today = new Date();


  "tabela": {
  "itemTabela_id": 2,
  "item_id": 7650,
  "vVenda": 95.9,
  "vPromo": 77.5,
  "vPromoData": "2022-09-25"
}

CodePudding user response：

Use the timestamps of each date.

You can get it with yourDate.getTime(), it returns a number that you can then compare.

const date = new Date();

const now = Date.now();
const yesterday = date.setHours(-24);

console.log(now);
console.log(yesterday);

console.log(now > yesterday);

EDIT

With string date-likes

const date = '2022-10-18';

const now = new Date(...date.split('-')).getTime();
const yesterday = new Date(...date.split('-')).setHours(-24);

console.log(now);
console.log(yesterday);

console.log(now > yesterday);

CodePudding user response：

As you has the date in format yyyy-MM-dd you can compare "string", the only is convert to string "today"

dateToString(date:any)
{
  return date.getFullYear() '-' 
         ('00' (date.getMonth() 1)).slice(-2) '-'
         ('00' date.getDate()).slice(-2)
}

//And use 

todayTxt:string=this.dateToString(new Date());

CodePudding user response：

You can easily get yyyy-MM-dd from Date object from toISOString and chopping the unnecessary part, sth along the lines

const todayAsString = new Date().toISOString().split('T').shift(); 
console.log(todayAsString);

But: Angular has a built-in pipe, date, for formatting dates. Just use it in the template

<div *ngIf="item.tabela.vPromo && (today | date: 'yyyy-MM-dd') < item.tabela.vPromoData">

CodePudding user response：

When working with dates use some well tested and robust library like date-fns that is tree-shakeable, supports locales and works with built-in Date objects too.

isAfter(
  parse(item.tabela.vPromoData, 'yyyy-MM-dd', new Date()), 
  new Date()
)