英文| https://betterprogramming.pub/5-ways-to-refactor-if-else-statements-in-javascript-functions-2865a4bbfe29 翻译| 小爱 在本文中,我将介绍5种通过不必要的if-else语句来整理代码的方法。我将讨论默认参数,或(||)运算符,空位合并,可选链no-e...
noElseReturns("hello!") // => "hello" 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 该no-else-return语句的好处是,如果不满足条件,该函数将结束的执行if-else并跳至下一行。你甚至可以不使用最后一行(return null),然后返回undefined。 注意:我实际上在前面的示例中使用了一个no-else-return函数。
The if/else statement is a part of JavaScript's "Conditional" Statements, which are used to perform different actions based on different conditions. In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true ...
Syntax (else if) The syntax for the else if statement in JavaScript is: if (condition1) { // statements to execute when condition1 is TRUE } else if (condition2) { // statements to execute when condition1 is FALSE and condition2 is TRUE } else { // statements to execute when both...
In JavaScript we have the following conditional statements:Use if to specify a block of code to be executed, if a specified condition is true Use else to specify a block of code to be executed, if the same condition is false Use else if to specify a new condition to test, if the ...
Life is full of conditional statements. If your homework is done you can go out and play, else you’re in trouble young man! If its good weather we’re going to the beach today, else if it’s raining we’re staying home. In fact, we based most of our choices on if then else st...
JavaScript if语句用于函数 js中if函数的使用方法 1.条件语句if if 语句 if 语句是 ECMAScript 中最常用的语句之一,事实上在许多计算机语言中都是如此。 if 语句的语法: if (condition) statement1 else statement2 1. 其中condition可以是任何表达式,计算的结果甚至不必是真正的 boolean 值,ECMAScript 会把它转换...
JavaScript If…Else StatementsIn this tutorial you will learn how to write the decision-making code using if...else...else if conditional statements in JavaScript.JavaScript Conditional StatementsLike many other programming languages, JavaScript also allows you to write code that perform different ...
JavaScript Example of if else if: In this tutorial, we will learn how if else if works in JavaScript? Here, we are writing a JavaScript example to demonstrate the use and working of if else if in JavaScript.
In the above example, the if statement checks for the condition age >= 18.Since we set the value of age to 17, the condition evaluates to false.Thus, the code inside if is skipped. And, code inside else is executed.When can we omit { } in if…else statements? We can omit { }...