Set a variable in input

user_13922670 0
Viewed 49

I want to use puppeteer to login faster and i made this script, but it recognize the variable of the input as a variable of the site

let data = {
    email : 'mail',
    password : 'passwd'
}

async function login(data) {
  page.evaluate(() => {
    document.querySelector('#loginlb > div.c-loginlb__popup > div > form > div:nth-child(1) > input').value = data.email;
  });
}

The error is this: Evaluation failed: TypeError: Cannot read property 'email' of undefined

How can i fix that?

puppeteer node.js javascript
2 Answers

You should pass arguments after evaluate arrow function. like this page.evaluate(pageFunction, ...pageFunction arguments) . docs.

let data = {
    email : 'mail',
    password : 'passwd'
}

async function login(_data) {
  page.evaluate((data) => {
    document.querySelector('#loginlb > div.c-loginlb__popup > div > form > div:nth-child(1) > input').value = data.email;
  },_data);
}
user_136752890

Since data is not within the scope in page.evaluate, you can set it in global and retrieve it with global since it'll always be in scope.

global['data'] = {
    email : 'mail',
    password : 'passwd'
}

async function login(data) {
  page.evaluate(() => {
    document.querySelector('#loginlb > div.c-loginlb__popup > div > form > div:nth-child(1) > input').value = global['data'].email;
  });
}
user_129896720
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