js获取地址栏路径中参数

方法一：正则

const GetQueryString = (name) => {
  let reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
  let r = window.location.search.substr(1).match(reg);
  if (r != null) return decodeURIComponent(r[2]);
  return null;
};
GetQueryString（name）

方法二：

function getQueryString(parameterName) {  
    const path = window.location.href;
    const parameterIndex = path.indexOf(parameterName);
    if (parameterIndex !== -1) {
      const valueStartIndex = parameterIndex + parameterName.length + 1;
      const valueEndIndex = path.indexOf('&', valueStartIndex) !== -1 ? path.indexOf('&', valueStartIndex) : path.length;
      const value = path.substring(valueStartIndex, valueEndIndex);
      return value
    }  
}
getQueryString("name")

 方法三：

const getUrlParam = (url, paraName) => {
  let arrObj = url.split("?");
  if (arrObj.length > 1) {
    let arrPara = arrObj[1].split("&")
    let arr;
    for (let i in arrPara) {
      arr = arrPara[i].split("=")
      if (arr != null && arr[0] == paraName) {
        return arr[1]
      }
    }
    return ""
  }
  else {
    return ""
  }
}
getUrlParam(url,"name")