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//// [typeGuardsOnClassProperty.ts]
// Note that type guards affect types of variables and parameters only and
// have no effect on members of objects such as properties.
// Note that the class's property must be copied to a local variable for
// the type guard to have an effect
class D {
data: string | string[];
getData() {
var data = this.data;
return typeof data === "string" ? data : data.join(" ");
}
getData1() {
return typeof this.data === "string" ? this.data : this.data.join(" ");
}
}
var o: {
prop1: number|string;
prop2: boolean|string;
} = {
prop1: "string" ,
prop2: true
}
if (typeof o.prop1 === "string" && o.prop1.toLowerCase()) {}
var prop1 = o.prop1;
if (typeof prop1 === "string" && prop1.toLocaleLowerCase()) { }
//// [typeGuardsOnClassProperty.js]
// Note that type guards affect types of variables and parameters only and
// have no effect on members of objects such as properties.
// Note that the class's property must be copied to a local variable for
// the type guard to have an effect
var D = (function () {
function D() {
}
D.prototype.getData = function () {
var data = this.data;
return typeof data === "string" ? data : data.join(" ");
};
D.prototype.getData1 = function () {
return typeof this.data === "string" ? this.data : this.data.join(" ");
};
return D;
}());
var o = {
prop1: "string",
prop2: true
};
if (typeof o.prop1 === "string" && o.prop1.toLowerCase()) { }
var prop1 = o.prop1;
if (typeof prop1 === "string" && prop1.toLocaleLowerCase()) { }
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