Contents
What are the things to avoid when using JavaScript?
Things to avoid in JavaScript (the bad parts)
- Avoid creating a new object by using new Object() .
- Same thing for arrays, favor [] over new Array() .
- Avoid blocks except where statements require them ( if , switch , loops, try ).
- Never assign inside an if of while statements condition part.
- Never use == and !=
Which is faster JavaScript or jQuery?
Nearly all plain Javascript functions will be faster than jQuery operations. This is because jQuery has overhead in creating a jQuery object in order to be more flexible, allow for chaining, support collections, etc…
What are the most common mistakes JavaScript developers make?
As JavaScript coding techniques and design patterns have become increasingly sophisticated over the years, there’s been a corresponding increase in the proliferation of self-referencing scopes within callbacks and closures, which are a fairly common source of “this/that confusion”. Consider this example code snippet:
Why are there so many bugs in JavaScript?
As discussed in our JavaScript Hiring Guide, a common source of confusion among JavaScript developers (and therefore a common source of bugs) is assuming that JavaScript creates a new scope for each code block. Although this is true in many other languages, it is not true in JavaScript. Consider, for example, the following code:
How can I avoid grammatical errors in JavaScript?
To avoid such syntax errors, you should spend time learning the grammatical rules of the JavaScript programming language. With extensive coding practice, you can spot the grammatical mistakes easily and avoid shipping them with your developed application. Some JavaScript developers do not know how to use the undefined and null keywords correctly.
Why does my JavaScript keep throwing an error?
The error is thrown because JavaScript code is usually executed according to the order it appears on a document. As such, the browser is unaware of the referenced element when the code runs. To solve such a problem, you can utilize various approaches.