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JavaScript按正向查找拆分字符串

regex javascript

rustyx · 技术社区 · 5 年前

我试着分割一个字符串,包括delimeters,所以举个例子

"a/b/c" ["a/", "b/", "c"]
"a//b" 会变成 ["a/", "/", "b"]

var s = "a/b/c".split(/(?<=\/)/);

console.log(s); // prints ["a/", "b/", "c"]

它在Chrome中运行得非常好,但是Firefox说: SyntaxError: invalid regexp group

守则合法吗?
如何在Firefox和Edge中工作?

1 回复 | 直到 5 年前

benvc 5 年前

let s = 'a/b/c'.split(/([^/]*\/)/).filter(x => x);
console.log(s);
// ["a/", "b/", "c"]

let s = 'a//b'.split(/([^/]*\/)/).filter(x => x);
console.log(s);
// ["a/", "/", "b"]

not-just-yeti 5 年前

[来源: http://kangax.github.io/compat-table/es2016plus/#test-RegExp_Lookbehind_Assertions ]

/\// "a/b//c//".split(/\//) 退货 ["a","b","","c","",""] .

顺便说一句,请确保在以“/”开头的字符串上测试您的解决方案,该字符串应该只返回 "/"

Serge Olabin 5 年前

我不知道为什么这个东西在其他浏览器中不起作用。但是你可以用下面的技巧 replace :

var text = 'a/b/c';
var splitText = text
    .replace(new RegExp(/\//, 'g'), '/ ') // here you are replacing your leading slash `/` with slash + another symbol e.g. `/ `(space is added) 
    .split(' ') // to further split with added symbol as far as they are removed when splitting.
Â console.log(splitText) // ["a/", "b/", "c"]