What pitfalls have you encountered in forEach in JavaScript? Please avoid these common misconceptions

In the world of JavaScript, forEach is one of the commonly used array traversal methods. Most developers are familiar with its basic usage, but do you know? When dealing with asynchronous operations, forEach may lead you into some unexpected pitfalls. This article will take you on a deeper understanding of the features and limitations of forEach, revealing some usage tips and solutions that you may not be aware of. Whether you are a beginner in front-end development or an experienced developer, you can learn useful knowledge from it to help you avoid hidden pitfalls in practical projects. are you ready? Let’s explore the truth!

Let’s talk about what forEach is first?

1. callbackThe callback function executed for each element can accept 1 to 3 parameters.

• currentValueThe currently processed element is required.
• index: The index of the currently processed element, optional.
• array: The original array object being operated on, optional.

1. thisArgWhen executing a callback function, the value of this defaults to a global object and is optional.

1. The forEach() method does not support…