How to match the specific quantity in javascript

This article mainly explains "how to match a specific quantity in javascript". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to match a specific quantity in javascript".

Description

1. The number of curly braces can be used to specify the upper and lower limits of the matching pattern. But sometimes only a certain number of matches are needed.

2. Specify a certain number of matching patterns by placing a number between the curly braces.

Example

The regular expression timRegex is required to be modified to match the word Timber with only four letters m. Let timStr = "Timmmmber"; let timRegex = / change/; / / modify this line let result = timRegex.test (timStr); see let timStr = "Timmmmber"; let timRegex = / tim {4} ber/i; / / modify this line let result = timRegex.test (timStr) Thank you for your reading, the above is the content of "how to match a specific quantity in javascript". After the study of this article, I believe you have a deeper understanding of how to match a specific quantity in javascript, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!