/**
 * 获取当前页面URL参数 (方法一)
 * @param {*} name 
 */
function query(name) {
    const search = location.search.substr(1)
    const arr1 = search.split('&')
    for(let i in arr1) {
        let arr2 = arr1[i].split('=')
        if (arr2[0] === name) {
            return arr2[1]
        }
    }
    return null
}
/**
 * 获取当前页面URL参数 (方法二)
 * @param {*} name 
 */
function query2(name) {
    const search = location.search.substr(1)
    const reg = new RegExp(`(^|&)${name}=([^&]*)(&|$)`, 'i')
    const res = search.match(reg)
    if (res == null) {
        return null
    }
    return res[2]
}
/**
 * 获取当前页面URL参数 (方法三)
 */
function query3(name) {
    const search = location.search
    const p = new URLSearchParams(search)
    return p.get(name)
}

anchen
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