12 lines
495 B
Plaintext
12 lines
495 B
Plaintext
When a variable is assigned an `+undefined+` or `+null+` value, it has no properties. Trying to access properties of such a variable anyway results in a `+TypeError+`, causing abrupt termination of the script if the error is not caught in a `+catch+` block. But instead of `+catch+`-ing this condition, it is best to avoid it altogether.
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== Noncompliant Code Example
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----
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if (x === undefined) {
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console.log(x.length); // Noncompliant; TypeError will be thrown
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}
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----
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include::../see.adoc[]
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