小编Shr*_*til的帖子

我有一个 typescript 装饰器工厂，它控制台记录执行函数所花费的总时间、实际函数执行结果和传递给装饰器的参数。

例如

export function performaceLog(...args: any[]) {
return (target: Object, key: string, descriptor: TypedPropertyDescriptor<any>) => {
    var msg = '';
    if (args.length != 0) {
        msg = args.map(arg => arg).join(' ');
    }

    if (descriptor === undefined) {
        descriptor = Object.getOwnPropertyDescriptor(target, key);
    }

    if (typeof descriptor.value !== 'function') {
        throw new SyntaxError('Only functions can be used with log decorators');
    }

    var originalMethod = descriptor.value.bind(target);

    descriptor.value = function() {
        var funcArgs: any = [];
        for (var i = 0; i …