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null, undefined をわざわざ空文字に置換する

TypeScript

Posted at 2020-03-31

// 置換前
const str1 = undefined;
const str2 = null;

// 空文字置換
const result1 = str1?.toString() ?? "";
const result2 = str1?.toString() ?? "";

console.log(result1); // ""
console.log(result2); // ""

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