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...
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-else-returns,和保护子句。 1、默认参数 你知道在使用不一致...
if( condition ) {// statements} 即使只有一个语句要执行,始终使用大括号是一种很好的编程习惯。这有助于代码更易于阅读并避免许多混淆。 请参阅以下示例: if( condition )statement_1statement_2; 如果不使用花括号,将很难看出 s...
if( condition ) { // statements } 1. 2. 3. 即使只有一个语句要执行,始终使用大括号是一种很好的编程习惯。这有助于代码更易于阅读并避免许多混淆。 请参阅以下示例: if( condition ) statement_1 statement_2; 1. 2. 3. 如果不使用花括号,将很难看出 statement_2 不属于 if 块。 如果您想在条件...
In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true Useelseto specify a block of code to be executed, if the same condition is false Useelse ifto specify a new condition to test, if the first condit...
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 ...
This tutorial will explain how the “if” and “if else” statements are used in JavaScript to make web applications more functional and useful. This is a basic tutorial but to understand the tutorial and to apply the concepts, a basic understanding of JavaScript is required. For a basic cou...
JavaScript Else If is a type of conditional statement that is used to compare different decisions. Conditional statements let you perform different actions based on varying conditions.JavaScript supports two types of conditional statementsnamely if..else..if and switch. In this tutorial, we will disc...
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 { }...
In this section, we shall see one of the most common conditional statements in JavaScript and programming, in general — the if statement. The if statement executes code if a given condition is true. Here's the syntax of an if statement: if (expression) statement; We start with the if ...