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//// [typeGuardsObjectMethods.ts]
// Note that type guards affect types of variables and parameters only and
// have no effect on members of objects such as properties.
// variables in global
var num: number;
var strOrNum: string | number;
var var1: string | number;
var obj1 = {
// Inside method
method(param: string | number) {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2: string | number;
num = typeof var2 === "string" && var2.length; // string
// parameters in function declaration
num = typeof param === "string" && param.length; // string
return strOrNum;
},
get prop() {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2: string | number;
num = typeof var2 === "string" && var2.length; // string
return strOrNum;
},
set prop(param: string | number) {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2: string | number;
num = typeof var2 === "string" && var2.length; // string
// parameters in function declaration
num = typeof param === "string" && param.length; // string
}
};
// return expression of the method
strOrNum = typeof obj1.method(strOrNum) === "string" && obj1.method(strOrNum);
// accessing getter property
strOrNum = typeof obj1.prop === "string" && obj1.prop;
//// [typeGuardsObjectMethods.js]
// Note that type guards affect types of variables and parameters only and
// have no effect on members of objects such as properties.
// variables in global
var num;
var strOrNum;
var var1;
var obj1 = {
// Inside method
method: function (param) {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2;
num = typeof var2 === "string" && var2.length; // string
// parameters in function declaration
num = typeof param === "string" && param.length; // string
return strOrNum;
},
get prop() {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2;
num = typeof var2 === "string" && var2.length; // string
return strOrNum;
},
set prop(param) {
// global vars in function declaration
num = typeof var1 === "string" && var1.length; // string
// variables in function declaration
var var2;
num = typeof var2 === "string" && var2.length; // string
// parameters in function declaration
num = typeof param === "string" && param.length; // string
}
};
// return expression of the method
strOrNum = typeof obj1.method(strOrNum) === "string" && obj1.method(strOrNum);
// accessing getter property
strOrNum = typeof obj1.prop === "string" && obj1.prop;
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