Motivation

Programming languages that are open to programmers allow them to use multiple methods to achieve the same result. JavaScript is no different. JavaScript is no different. We often find multiple ways to achieve the same result with JavaScript. This can sometimes be confusing.

Some usages are more effective than others, and these are my favorite. These are the ones I will be listing in this article. You will be able to find many more on your list.

Forget string concatenation, use template string(literal)

To create a meaningful string, you should not concatenate strings using the + operator. Concatenating strings that contain dynamic values (or expressions), can lead to frustrations or bugs.

Template literals (or Template strings), allow embedding of expressions. It is unique in that the string must be enclosed by the backtick (``). You can use placeholders to store dynamic values in template strings. These placeholders can be marked with curly braces ($expression) and the dollar sign.

Here's an example to illustrate it.

isInteger

It is possible to determine if a value you are referring to is an integer using a simpler method. This is possible using JavaScript's Number API. It provides an easy way to do this: isInteger() It is extremely useful and worth knowing.

Value as Number

Did you know that event.target.value returns a string value regardless of whether the input box is a number?

You can, as shown in the following example. This is a text box that accepts only type number input. This means that it only accepts numbers as input. It also has an event handler that handles key-up events.

We extract the value using the event.target.value method in the event handler. It returns a string value. It will now be a headache to convert it to an integer. What happens if the input box allows floating numbers (like 16.56)? parseFloat() then? All sorts of confusion and additional work!

Comma Operator

Surprised to discover that comma(.) is a distinct operator, I was not expecting it. It has been used so often in code that I didn't realize its true existence.

The JavaScript comma operator (,) is used to evaluate each of its operands left to right. It returns the value for the last operand.

It may be necessary to combine two objects to create an informative object. The spread operator ...(yes with three dots is available! ).

Take two objects into consideration: emp and job.

Both the spread operator as well as the Object.assign can perform a shallow merger. A shallow merge is when the properties of the first object and the second object are overwritten with identical property values.

Deep merge is possible with _mergeof lodash

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