Encountering an error message
Uncaught TypeError: Cannot read property 'top' of undefined
at VM32939 own.js:819
resulting from
var hands_corrected = (hands_original.top + 680)
this issue arises because "hands_original" is not used in any part of my project, making it undefined and causing the error.
In an attempt to fix this problem, I tried
var hands_corrected = (hands_original.top + 680) || 0;
but unfortunately, the error persisted. What could be the mistake I am making?
Here are two options to adjust the positioning:
var hands_corrected = (hands_original && hands_original.top + 680) || 0;
Alternatively, you can use:
var hands_corrected = hands_original ? hands_original.top + 680 : 0;
It is important to be mindful of two things: hands_original and hands_original.top. This way, I prefer to ensure both are checked properly.
var hands_corrected = (typeof(hands_original) != 'undefined' && typeof(hands_original.top) != 'undefined') ? hands_original.top + 680 : 0;
If we only check hands_original.top and hands_original is undefined, we may encounter a "ReferenceError: hands_original is not defined." Therefore, it is advisable to check both as demonstrated in my code snippet.
It appears that the object hands_original contains a key called top, but in this case, it seems that hands_original is actually undefined. As a result, it is unable to locate the key top.
var hands_corrected = hands_original && hands_original.top + 680 || 0;
This code checks if the object hands_original is defined. If it is defined, then a number is added to the value of its key top. If hands_original is undefined, the variable hands_corrected is assigned a value of 0.
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