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Summary: Learn efficient techniques to refactor an `if` statement with multiple `||` conditions in JavaScript for cleaner code. Applicable in both vanilla JavaScript and React.js.
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Refactor an if Statement with Multiple || Conditions in JavaScript

In JavaScript, using an if statement with multiple || (OR) conditions can often lead to cluttered and difficult-to-read code. This is particularly common when dealing with form validations or complex conditional rendering in frameworks like React.js. Fortunately, there are several techniques you can use to clean up these statements, making your code more readable and maintainable.

The Problem with Multiple || Conditions

Consider the following example:

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While this works perfectly fine, it quickly becomes unwieldy as the number of conditions increases. Moreover, it can be hard to read and understand, especially for someone unfamiliar with the code.

Approach 1: Using Arrays and the .includes() Method

One of the easiest ways to refactor multiple || conditions is to use an array and the .includes() method. This method is particularly useful when you are checking against a fixed set of values.

Example

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In this example, the array conditions holds all the conditions you want to check. The includes(true) method will return true if any of the conditions in the array are true.

Approach 2: Using a Loop

Another approach is to use a loop to iterate through the conditions and check if any of them are true.

Example

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Here, the for...of loop iterates over each condition. If a true condition is found, the code block is executed, and the loop is terminated with break for efficiency.

Approach 3: Custom Helper Function

For more complex conditions, creating a custom helper function can make your code more organized and reusable.

Example

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This function anyConditionTrue takes a variable number of arguments and uses the .some() method to determine if any of them are true.

Application in React.js

These techniques are equally applicable in React.js for conditional rendering or form validation.

Example in React.js

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Here, the isValid variable simplifies the JSX by abstracting away the multiple conditions into a single, readable expression.

Conclusion

Refactoring if statements with multiple || conditions can significantly improve the readability and maintainability of your code. Whether you are working with vanilla JavaScript or building sophisticated interfaces in React.js, these techniques provide flexible, efficient alternatives for complex conditional logic.

By employing these methods, you create a codebase that is easier to navigate and maintain—beneficial for both current and future developers who may interact with your code.