search method in JavaScript regular expressions

In this lesson, we will analyze the search method, which searches a string using a regular expression. It receives the following parameters:

string.search(regex)

The method returns the position of the first found substring, and if it is not found, then -1.

In the following example, we find a position of the substring 'aaa' in our string:

let str = 'a aa aaa aaaa aaaa'; let res = str.search(/aaa/);

As a result, the following will be written to the variable:

5

Given a string:

let str = '1 23 456 789';

Find a position of the first number that has three digits.

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