How does one avoid or suppress code exceptions while trying to assign an object value via exactly one expression

I am really at the beginning with JavaScript and I am trying to assign a value of my object field. The value is coming from another object, but that value must be modified. It crashes if the value is …

Javascript: difference between a statement and an expression?

I asked this question earlier, and after thinking about the topic some more, I began to wonder where the seemingly fuzzy boundary between the meanings of the terms “statement” and “expression” lies. …