What is the meaning of this JS code?

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function toggleCheck() {
    if (!checked) {
      items.forEach( item => {
        item.added = true;
      });
      checked = !checked;
      this.textContent = 'Uncheck All'
    } 
    else {
      items.forEach( item => {
        item.added = false;
      });
      checked = !checked;
      this.textContent = 'Check All'
    }

What I have tried:

I especially want to understand what does item.added=true and item.added=true represent in general?

Posted 16-Apr-22 19:43pm

Abhinav Kishore M

Updated 16-Apr-22 20:00pm

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Peter_in_2780 · Accepted Answer · 2022-04-16T19:57:00

Solution 1

Somewhere else in your secret code, there is a collection items of objects. Those objects have a property named added which can take a boolean value.
Beyond that, we can't tell you any more from the snippet you have presented.

Posted 16-Apr-22 19:57pm

Peter_in_2780

OriginalGriff · Accepted Answer · 2022-04-16T20:00:00

In isolation we can't really tell why that code does what it does - we have no idea what your items and the collection are being used for - but it would appear that it's toggling an option to check or uncheck a displayed collection of isothing, and marking them as "in the collection" or "not in the collection" for later processing.

I'd suggest you go back to where you got that code, and either look more closely at how that interacts with the rest of the page, or ask the original author about it ... random people with no access to the whole project can't be at all specific!