18 lines
320 B
TypeScript
18 lines
320 B
TypeScript
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// @noEmit: true
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// @allowJs: true
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// @checkJs: true
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// @noImplicitAny: true
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// @strictNullChecks: true
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// @Filename: a.js
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class Base {
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m() {
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this.p = 1
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}
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}
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class Derived extends Base {
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m() {
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// should be OK, and p should have type number | undefined from its base
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this.p = 1
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}
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}
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