使用javascript替换url中的参数

var url = window.location.href;

var params = url.split('?')[1];

var paramObj = {};
if (params) {
    var paramArr = params.split('&');
    for (var i = 0; i < paramArr.length; i++) {
        var param = paramArr[i].split('=');
        paramObj[param[0]] = param[1];
    }
}

paramObj['paramName'] = 'newValue';

var newParams = Object.keys(paramObj).map(function(key) {
    return key + '=' + paramObj[key];
}).join('&');
var newUrl = url.split('?')[0] + '?' + newParams;

function replaceUrlParam(paramName, newValue) {
    var url = window.location.href;
    var params = url.split('?')[1];
    var paramObj = {};
    if (params) {
        var paramArr = params.split('&');
        for (var i = 0; i < paramArr.length; i++) {
            var param = paramArr[i].split('=');
            paramObj[param[0]] = param[1];
        }
    }
    paramObj[paramName] = newValue;
    var newParams = Object.keys(paramObj).map(function(key) {
        return key + '=' + paramObj[key];
    }).join('&');
    var newUrl = url.split('?')[0] + '?' + newParams;
    return newUrl;
}

// 示例用法
var paramName = 'page';
var newValue = '2';
var newUrl = replaceUrlParam(paramName, newValue);
console.log(newUrl);