javascript - lodash 油门功能似乎没有被调用

Question

我throttle第一次使用 lodash 的函数来尝试限制对 API 的调用次数，但是在我的尝试中，我似乎无法让它触发调用。

我在下面包含了一个简化版本：

const _ = require('lodash');

let attempts = 0;

const incrementAttempts = () => {
  console.log('incrementing attempts');
  attempts++;
  console.log("attempts now: " + attempts);
}

const throttledAttempts = () => { 
  // From my understanding, this will throttle calls to increasedAttempts to one call every 500 ms
  _.throttle(incrementAttempts(), 500); 
}

// We should make 5 attempts at the call
while(attempts < 5) {
  throttledAttempts();
}

这最初给了我输出：

incrementing attempts
attempts now: 1
TypeError: Expected a function
    at Function.throttle (/home/runner/SimilarUtterUnits/node_modules/lodash/lodash.js:10970:15)

在查找此错误后，我看到了向throttle函数添加匿名包装器的建议，所以现在我throttledAttempts看起来像：

const throttledAttempts = () => { 
  _.throttle(() => incrementAttempts(), 500); 
}

但是这样做......我现在没有任何控制台输出！

我究竟做错了什么？

Answer 1

返回新的_.throttle节流函数。你的代码应该是这样的：

let attempts = 0;

const incrementAttempts = () => {
  console.log('incrementing attempts');
  attempts++;
  console.log("attempts now: " + attempts);
}

const throttledAttempts = _.throttle(incrementAttempts, 500);

// We should make 5 attempts at the call
while(attempts < 5) {
  throttledAttempts();
}