我想用正则表达式删除重复的单词
let url = "/courses?category=programming&filter=free&filter=free"
const az = url.replace(/(\b\S.+\b)(?=.*\1)/g, "").trim();
console.log(az) // /courses?category=programmingfree&filter=free
我想要得到/courses?category=programming&filter=free