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JavaScript One Solution

karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points
Posted by karan Badhwar
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karan Badhwar
Web Development Techdegree Graduate 18,135 Points

why Guil wrapped the err object

why Guil wrapped the err object, in curly braces, as Andrew always passed the Objects as it is ?

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

Depending on the rest of the syntax, the braces either create a new anonymous object, or they assign a property from one to a variable of the same name.

karan Badhwar
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.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points
karan Badhwar
.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points

Hello sir Steven Parker, but in the video it was the err object that was passed from other route after creating it with new Error() constructor, but still when we received it, it should be an object right?

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

Assuming you're asking about the place where .render() is called, the error object is being passed inside a new anonymous "locals" object as a property named "err".

karan Badhwar
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points
karan Badhwar
.a{fill-rule:evenodd;}techdegree seal-36
karan Badhwar
Web Development Techdegree Graduate 18,135 Points

Steven Parker, yes so we are passing an anonymous object wit ha property of err(which is an object itself), but what is the reason for doing that, what if we just pass the err object?

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

That's done to satisfy the requirements for the locals argument to .render(). For more details, see the online documentation for the .render() method.