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Illegal invocation

ID: js/illegal-invocation Kind: problem Security severity: Severity: error Precision: high Tags: - quality - reliability - correctness - language-features Query suites: - javascript-code-quality.qls - javascript-security-and-quality.qls

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Class methods and arrow functions must not be invoked using new, and attempting to do so will result in a runtime error.

Conversely, constructors can only be invoked using new or super(...), and attempting to invoke them as a normal function will result in a runtime error.

Recommendation

Correct the invocation in question by adding or removing new as appropriate.

Example

In the following example, Point is a class, but on line 8 it is invoked without new. This will lead to a runtime error.

class Point {  constructor(x, y) {  this.x = x;  this.y = y;  } } let p = Point(23, 42);

Instead, new should be used:

class Point {  constructor(x, y) {  this.x = x;  this.y = y;  } } let p = new Point(23, 42);

References