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

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