javascript return undefined
2024年7月25日 — A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns ... ,2016年6月23日 — In my opinion, return null . Leave undefined to JavaScript itself. However, there is no better so this is a matter of opinion.
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 javascript return undefined 相關參考資料
JavaScript 函式的一些基本觀念. Return value 回傳值
2018年8月10日 — 一個function內如果沒有明確呼叫return時，回傳值是undefined。 函式也是一種特殊的物件型態. 函式也是物件，可以被指派給一個變數。它也可以被放進 ... https://medium.com undefined - JavaScript - MDN Web Docs - Mozilla
2024年7月25日 — A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns ... https://developer.mozilla.org Is it better to return `undefined` or `null` from a javascript ...
2016年6月23日 — In my opinion, return null . Leave undefined to JavaScript itself. However, there is no better so this is a matter of opinion. https://stackoverflow.com return - JavaScript - MDN Web Docs - Mozilla
2024年7月28日 — return 表達式會終止函式執行，並指明函式呼叫器（function caller）要回傳的數值。 https://developer.mozilla.org How to return undefined from a function in JavaScript
2023年1月31日 — To return undefined from a function in JavaScript, you simply don't return anything or you explicitly return the value undefined . https://www.quora.com 2024看懂AI寫JavaScript時，回傳undefined的5種狀況- 陳國仁
2023年9月12日 — 1.函數不論有沒有參數，設定後，不論有沒有用小括號執行，JS都會回覆undefined。 · 2.解法，函數裡面加入return 回傳結果，JS就不會回覆undefined。 · 3. https://medium.com How to avoid returning undefined from a function that ...
2023年11月14日 — Every function returns undefined if you don't return something. In your code, if an error is thrown in the try catch block, no return statement ... https://www.reddit.com Returning undefined - JavaScript
2019年3月21日 — Every function returns something. It may not be something you want or need, it may not be something you consume, it may not even be something ... https://forum.freecodecamp.org why does this return undefined
When there is no identifier before a function call (i.e. obj.foo() ) , JavaScript assumes it is being called by the global variable. So when it finally runs ... https://www.codecademy.com Why function "return UNDEFINED"
// Because x is a variable parameter and he must need a return keyword to show the value of this variable, otherwise, he doesn't work. ... Because you haven't ... https://www.sololearn.com |