例如当前网页地址为https://xxx.org.cn:9999/kejiao/index?title=高血压
但是你复制下来或者js获取是字符串,如: https://xxx.org.cn:9999/kejiao/index?title=%E6%98%AF%E5%A4%9A%E5%B0%91
console.log(window.location.search.split('=')[1]) // %E6%98%AF%E5%A4%9A%E5%B0%91
console.log(decodeURIComponent(window.location.search.split('=')[1])) //高血压