30 lines
456 B
TypeScript
30 lines
456 B
TypeScript
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// @noEmit: true
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// @allowJs: true
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// @checkJs: true
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// @strict: true
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// @noImplicitThis: false
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// @Filename: a.js
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/** @param {number} x */
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function C(x) {
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this.x = x
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}
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C.prototype.m = function() {
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this.y = 12
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}
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var c = new C(1)
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c.x = undefined // should error
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c.y = undefined // ok
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/** @param {number} x */
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function A(x) {
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if (!(this instanceof A)) {
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return new A(x)
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}
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this.x = x
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}
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var k = A(1)
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var j = new A(2)
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k.x === j.x
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