Basic JavaScript - Record Collection

JavaScript
1

I have completed the record collection challenge but there is a question if i write:

records.id.prop=value; //line 1
records.id.prop.push(value); //line 2

the challenge is not passed but when i write:

records[id][prop]=value; //line 3
records[id][prop].push(value); //line 4

the challenge is passed.
whats the difference between line1 and line3 and line2 and line4?

2

You can only use dot notation with the exact literal name of a property. If you have the property name in a variable, bracket notation is mandatory.

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3

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