Question

鉴于代码：

var regExGroup = new RegExp("\\[group(.*)\\][\s\S]*\\[/group]", 'gi');
var regExResGroup;
while ((regExResGroup = regExGroup.exec(result)) !== null) {
    console.log(regExResGroup[0]);
}

测试数据（result的值）：

[comment]This is a comment[/comment][group title="This" description="That"]
[comment]This is a comment[/comment]
[event]
[condition object="Touch"]On touch[/condition]
[condition object="Touch"]On touch[/condition]
[action object="Sprite"]Destroy[/action]
[action object="Sprite"]Destroy[/action]
[comment]This is a comment[/comment]
[event]
[condition object="Touch"]On touch[/condition]
[condition object="Touch"]On touch[/condition]
[action object="Sprite"]Destroy[/action]
[action object="Sprite"]Destroy[/action]
[/event]
[/event]
[group title="This" description="That"]
[event]
[condition object="Touch"]On touch[/condition]
[condition object="Touch"]On touch[/condition]
[action object="Sprite"]Destroy[/action]
[action object="Sprite"]Destroy[/action]
[event]
[condition object="Touch"]On touch[/condition]
[condition object="Touch"]On touch[/condition]
[action object="Sprite"]Destroy[/action]
[action object="Sprite"]Destroy[/action]
[/event]
[/event]
[/group]
[/group]

为什么找不到匹配项？

Answer 1

多行是m，而不是g。 g用于全局，以匹配正则表达式的所有实例。否则只会匹配一次。

new RegExp("\\[group(.*)\\][\s\S]*\\[/group]", 'gim');

Answer 2

我猜你可以试试其中一个引用/分隔符选项

 #  (?s)\[group(.*?)\].*?\[/group\]
 # /(?s)\[group(.*?)\].*?\[\/group\]/
 # '/(?s)\[group(.*?)\].*?\[\/group\]/'
 # "(?s)\\[group(.*?)\\].*?\\[/group\\]"
 # 

 (?s)
 \[group
 ( .*? )
 \]
 .*? 
 \[/group\]

Javascript Regex multiline无法正常工作

2 个答案: