jquery 如何在一个函数中使用另一个函数中的变量- javascript

vfh0ocws 于 2022-11-03 发布在 jQuery

关注(0)|答案(2)|浏览(250)

这里有两个相互依赖的函数

async function block() {
  let getBlock = await web3.eth.getBlock('latest');
  console.log(getBlock['number']);
  let lblock = getBlock['number'] - 8;
  console.log(lblock);
}
block();

pcsfactoryC.events.PairCreated({
  fromBlock: lblock
})

使用async函数，我得到了最新的块，然后进行了一些计算，得到了变量lblock，我在下面的函数中使用它作为{fromBlock: lblock}的输入
那么，如何在另一个函数中使用变量“lblock”呢？

jquery

来源：https://stackoverflow.com/questions/68976355/how-to-use-a-variable-from-1-function-in-another-function-javascript

2条答案

按热度按时间

zmeyuzjn1#

Return it from the function.
Since block() is async , it returns a promise. You either have to use await to wait for it (you can only do this if the other function is also async , or use .then() to execute a function when the promise is resolved.

async function block() {
  let getBlock = await web3.eth.getBlock('latest');
  console.log(getBlock['number']);
  let lblock = getBlock['number'] - 8;
  console.log(lblock);
  return lblock;
}
block().then(lblock => pcsfactoryC.events.PairCreated({
  fromBlock: lblock
}));

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72qzrwbm2#

设函数abc（）{ a=10 }
函数xyz（）{ alert（a）}
abc（）xyz（）

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