2fecc132ab
From spec: Note that type guards affect types of variables and parameters only and have no effect on members of objects such as properties
57 lines
1.9 KiB
TypeScript
57 lines
1.9 KiB
TypeScript
//// [typeGuardsInProperties.ts]
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// Note that type guards affect types of variables and parameters only and
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// have no effect on members of objects such as properties.
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var num: number;
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var strOrNum: string | number;
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class C1 {
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private pp1: string | number;
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pp2: string | number;
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// Inside public accessor getter
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get pp3() {
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return strOrNum;
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}
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method() {
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strOrNum = typeof this.pp1 === "string" && this.pp1; // string | number
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strOrNum = typeof this.pp2 === "string" && this.pp2; // string | number
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strOrNum = typeof this.pp3 === "string" && this.pp3; // string | number
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}
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}
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var c1: C1;
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strOrNum = typeof c1.pp2 === "string" && c1.pp2; // string | number
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strOrNum = typeof c1.pp3 === "string" && c1.pp3; // string | number
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var obj1: {
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x: string | number;
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};
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strOrNum = typeof obj1.x === "string" && obj1.x; // string | number
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//// [typeGuardsInProperties.js]
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// Note that type guards affect types of variables and parameters only and
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// have no effect on members of objects such as properties.
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var num;
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var strOrNum;
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var C1 = (function () {
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function C1() {
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}
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Object.defineProperty(C1.prototype, "pp3", {
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// Inside public accessor getter
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get: function () {
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return strOrNum;
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},
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enumerable: true,
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configurable: true
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});
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C1.prototype.method = function () {
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strOrNum = typeof this.pp1 === "string" && this.pp1; // string | number
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strOrNum = typeof this.pp2 === "string" && this.pp2; // string | number
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strOrNum = typeof this.pp3 === "string" && this.pp3; // string | number
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};
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return C1;
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})();
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var c1;
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strOrNum = typeof c1.pp2 === "string" && c1.pp2; // string | number
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strOrNum = typeof c1.pp3 === "string" && c1.pp3; // string | number
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var obj1;
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strOrNum = typeof obj1.x === "string" && obj1.x; // string | number
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