对象在Microsoft Edge中不支持属性或方法“设置”

Question

此代码在Microsoft Edge中不起作用：

let formdata = new FormData;
formdata.set('name', this.form.name);

错误：

Unhandled promise rejection TypeError: Object doesn't support property or method 'set'

description: "Object doesn't support property or method 'set'"
message: "Object doesn't support property or method 'set'"
number: -2146827850
stack: "TypeError: Object doesn't support property or method 'set' at l.methods.sendData