methods () {
 /**
 * 支付寶支付
 */
 goAlipay () {
 this.$loading.show()
 const data = {
 /* 自身接口所需的一些參數 */
 ...
 amount: this.price,
 /* 支付后支付寶return的url */
 // returnUrl: 'www.baidu.com'
 returnUrl: window.location.origin + window.location.pathname + '?userParams=' + this.userParams
 }
 this.$http(
 this.$apiSetting.alipay,
 data
 ).then(res => {
 this.$loading.hide()
 if (res.data.statusCode === '000000') {
 const div = document.createElement('div')
 /* 此處form就是后臺返回接收到的數據 */
 div.innerHTML = res.data.data.alipayInfo
 document.body.appendChild(div)
 document.forms[0].submit()
 }
 }, error => {
 this.$loading.hide()
 console.log(error)
 })
 }
}