RangeError with invalid time value in eleventy.

[charmakeqalinle]

Eleventy throw an error when I use a custom dateDisplay.js filter:
`export default v => {
const dateTime = new Date(v);
const options = { weekday: "long", month: "long", year: "numeric", day: "numeric" };

return new Intl.DateTimeFormat("en-US", options).format(dateTime);
};`
I created a custom repo for it.

[Ryuno-Ki]

I took a look at the filter and learned that it throws when v is undefined.

My next question then was when this happens. You're using the filter in one place so the template partial was easy enough to find.
Logging when item.data.date is undefined showed me that the filter is also invoked for pages with the title „Welcome to Charmake Qalinle’s blog.” and „Welcome to Charmake Qalinle’s all tag.” See /tag/all.

So a check using an {% if item.data.date %} should be enough to avoid the error.

[charmakeqalinle]

Thank you @Ryuno-Ki, It works. But as you mentioned: it iterates nonexistent list item after post 4 under /tag/all, how to mitigate it. Subsequently, I want to know the root problem, if I dispose of the dateDisplay filter all works well.

[Ryuno-Ki]

I would imagine the special all collection is responsible for at least one of the entries there.