Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.4k views
in Technique[技术] by (71.8m points)

node.js - how to pass a variable to puppeteer page.$eval();

I declared a variable and I am trying to pass it into an eval but it does not get displayed. How can I properly pass a variable.

var now = moment().format('YYYY-MM-D');
await page.$eval('#middleContent_txtEndDate', el => el.value = now);

If I declare a variable inside the eval function it works:

var now = moment().format('YYYY-MM-D');
await page.$eval('#middleContent_txtEndDate', el => el.value = "it works");
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You can pass aditional arguments, to $eval

const now = moment().format('YYYY-MM-D');

await page.$eval('#middleContent_txtEndDate', (el, now, foo) => {
   console.log(el, now, foo);
   return el.value = now;
}, now, 'foo');

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...