获取浏览器参数

'''js

function getUrlParams(key) { let queryString = ''

const href = window.location.href const hashIndex = href.indexOf('#') const queryIndex = href.indexOf('?')

if (hashIndex !== -1 && href.includes('?#')) { // hash 模式，形如 a.com/#/?id=1 const hashQueryIndex = href.indexOf('?', hashIndex) queryString = href.slice(hashQueryIndex + 1) } else if (hashIndex !== -1 && href[hashIndex + 1] === '?') { // hash 模式，?# 开头 queryString = href.slice(hashIndex + 2) } else if (queryIndex !== -1) { // 普通模式 queryString = href.slice(queryIndex + 1).split('#')[0] }

if (!queryString) return key ? null : {}

const pairs = queryString.split('&') const result = {}

for (const pair of pairs) { if (!pair) continue const [rawKey, rawValue] = pair.split('=') if (!rawKey) continue

const k = decodeURIComponent(rawKey.trim())
const v = rawValue !== undefined ? decodeURIComponent(rawValue.trim()) : null

if (result[k] !== undefined) {
  result[k] = Array.isArray(result[k]) ? [...result[k], v] : [result[k], v]
} else {
  result[k] = v
}

}

return key ? (result.hasOwnProperty(key) ? result[key] : null) : result }

'''