把URI字符串采用UTF-8编码格式转化成escape各式的字符串。
encodeURI不编码字符有82个:!,#,$,&,',(,),*,+,,,-,.,/,:,;,=,?,@,_,~,0-9,a-z,A-Z
encodeURI()用于整个url编码
const t = ' http://localhost:8080/pro?a=1&b=张三&c=aa'
console.log(encodeURI(t), decodeURI(encodeURI(t)))
/** %20http://localhost:8080/pro?a=1&b=%E5%BC%A0%E4%B8%89&c=aa
http://localhost:8080/pro?a=1&b=张三&c=aa */