装饰器解决按钮、表单重复提交

export function HandleAsyncOperate(name?) {
    return function (
        target: any, 
        key: string, 
        descriptor: TypedPropertyDescriptor<Function>
    ) {
        let func = descriptor.value;
        let flag = false;
        console.log(arguments, "HandleFormSubmit");
        descriptor.value = async function (...args) {
            console.log(flag, 'before func.call')
            if (flag) {
                console.log('flag true return false')
                return false;
            }
            flag = true;
            await func.call(this, ...args);
            flag = false;
            console.log(flag, 'after func.call')
        };
    };
}
// 方式一
@HandleAsyncOperate()
async asyncOpertate() {
    await new Ajax(...)
}
// 方式二
@HandleAsyncOperate() 
asyncOpertate() {
    return new Promise(...)
}