Question

我有以下字符串：

let str = '/user/:username/'

我要提取username并用harry替换掉冒号。

我尝试了以下操作：

const regex = /[^:]+(?=:)/g
str.replace(regex, x => console.log(x))

Answer 1

尝试：/:\w+/

let str = '/user/:username/'
str.replace(/:\w+/, "harry")
// => "/user/harry/"

Answer 2

let str = '/user/:username/';
let html = str.replace(":username", "harry");
console.log(html);

Answer 3

var str = '/user/:username/';
var newstr = str.replace(/:username/i, "harry");
print(newstr);

嗨，朋友，这是您要找的东西吗？我在https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/String/replace

找到了它

Answer 4

您可以这样使用：

function convertSeconds(secT){ 

var seconds = secT % 60; 

var minutes = ((secT - seconds)/60) % 60; 

var hours = (secT - seconds - (minutes * 60)) / 3600 % 3600;
//EDIT
var print = "";
If(hours!=0){
    print = print + hours + " hours ";
}
if(minutes!=0){
    print = print + minutes  + " minutes ";
}
if(seconds!=0){
    print = print + seconds + " seconds ";
}
alert(print);
}

Answer 5

在您的正则表达式[^:]+(?=:)中，您匹配了1次以上而不是冒号，并断言最后应该有一个冒号，导致匹配/user/

如果要使用否定的字符类，可以匹配一个冒号而不是一个正斜杠：

:[^\/]+

const str = `/user/:username/`;
const result = str.replace(/:[^\/]+/, "harry");
console.log(result);

正则表达式替换JS中的冒号

5 个答案: