41 lines
1.1 KiB
Plaintext
41 lines
1.1 KiB
Plaintext
``++readonly++`` properties can only be assigned in a class constructor or at the point of declaration. If a class has a property that's not marked ``++readonly++`` but is only set in the constructor, it could cause confusion about the property's intended use. To avoid confusion, such properties should be marked ``++readonly++`` to make their intended use explicit, and to prevent future maintainers from inadvertently changing their use.
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== Noncompliant Code Example
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[source,javascript]
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----
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class Person {
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private _birthYear: number; // Noncompliant
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constructor(birthYear: number) {
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this._birthYear = birthYear;
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}
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}
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----
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== Compliant Solution
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[source,javascript]
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----
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class Person {
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private readonly _birthYear: number;
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constructor(birthYear: number) {
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this._birthYear = birthYear;
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}
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}
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----
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::../message.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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