How to Convert a String into a Regular Expression in js

var？ regStr？ =? /iOs/ig '

var？ Regular expression? =? eval(regStr)

RegExp.test('dksiOssd') aims to convert strings into regular expressions according to topics. I wonder if I have correctly understood the meaning of the topic:

Which hospital is the best for treating spine in Shanghai?

What are the benefits of silicone breast augmentation?

What are the local products of Zhangjiajie?

Small class children paste and add pictures.

Does freckle rebound? Is it useful?

Who is the most serious female star in plastic surgery?

What age is the best operation for lip and nose deformity?

After surgical radiotherapy for chest keloid, the doctor said that the skin will turn black, is it local skin or all?

How much is Zhengzhou Tianhou wrinkle needle?

Why is it difficult for community "family doctors" to go deep into the people?