Cheerio.js：$find承诺被拒绝

问题描述

我试图使用Cheerio从特定的父元素中获取某个HTML类的子元素。这是我的代码：

const $ = cheerio.load(validHtmlBody);
var sections = $(".zloOqf").find(".fl").length;
return res.status(400).send(sections);

但是，此代码被拒绝，并出现UnhandledPromiseRejectionWarning错误：

(node:60502) UnhandledPromiseRejectionWarning: RangeError [ERR_HTTP_INVALID_STATUS_CODE]: Invalid status code: 1
    at ServerResponse.writeHead (_http_server.js:208:11)
    at ServerResponse.writeHead (index.js:44:26)
    at ServerResponse._implicitHeader (_http_server.js:199:8)
    at ServerResponse.end (_http_outgoing.js:717:10)
    at ServerResponse.send (/node_modules/express/lib/response.js:221:10)
    at index.js:41:30
    at processTicksAndRejections (internal/process/next_tick.js:81:5)
(node:60502) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block,or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:60502) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future,promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

将此代码放入try catch块中并返回错误只会返回一个空的json。

解决方法

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