In-depth understanding of the analysis of REGEXP object attributes of JS regular expressions

This article mainly introduces the analysis of REGEXP object attributes for in-depth understanding of JS regular expressions. It has a certain reference value. Now I share it with you. Friends in need can refer to it

Object attributes

Commonly used object attributes mainly include the following:

1.global: Whether to search in full text, the default is false

2.ignore case: Whether to be case sensitive, the default is false

3.multiline: multi-line search, the default value is false

4.lastIndex: It is the last character of the matching content of the current expression, used to specify the starting point of the next match Starting position

5.source: Text string of regular expression

You can access this property directly in the reg object:

let reg1 = /\w/

let reg2 = /\w/gim  // 设置reg属性

reg1.global         // false
reg1.ignoreCase     // false
reg1.multiline      // false
reg1.source         // "\w"

reg2.global         // true
reg2.ignoreCase     // true
reg2.multiline      // true
reg2.source         // "\w"

It is worth mentioning that, These attributes are read-only, and you cannot directly modify their values:

reg1.global         // false

reg1.global = true

reg1.global         // false

The above is the entire content of this article. I hope it will be helpful to everyone's learning. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

In-depth understanding of the analysis of grouping of JS regular expressions

In-depth understanding of the analysis of JS regular expressions Analysis of greedy mode and non-greedy mode

The above is the detailed content of In-depth understanding of the analysis of REGEXP object attributes of JS regular expressions. For more information, please follow other related articles on the PHP Chinese website!