The specified string is intercepted by "o"
When a base64 needs to trim the front part
var params={
"imgJustBase64":this.zheng.split(",")[1],
"imgBackBase64": this.fan.split(",")[1],
}
var params={
"imgJustBase64":this.zheng.split(",")[1],
"imgBackBase64": this.fan.split(",")[1],
}