Dear everybody I have a problem with selector in puppeter.
I have this code.
for(var k= 0 ; k<= 21 ; k++) {
const text = await page.evaluate(() => {
document.querySelector(
'div.ui-table__row:nth-child('+k+') > a:nth-child(1) > div:nth-child(2)'
).textContent
})
console.log(text);
}
The problem when I try to execute this snippet is that I don't have defined k but i think that is correct.
Error: Evaluation failed: ReferenceError: k is not defined
How I can solve this problem ? Regards
k needs to be explicitly passed/injected into evaluate()
const k = 'foo'
await page.evaluate(k => {...}, k)
Change to:
for(var k= 0 ; k<= 21 ; k++) {
const text = await page.evaluate((nth) => {
document.querySelector(
'div.ui-table__row:nth-child('+nth+') > a:nth-child(1) > div:nth-child(2)'
).textContent
}, k)
console.log(text);
}
According to this document, You have to pass the variable as an argument to the page.evaluate like this:
const result = await page.evaluate((x) => { // 1. Define "x" to get value in the step 2
return Promise.resolve(8 * x); // 3. Return the result
}, 7); // 2. Pass 7 to "x"
console.log(result); // prints "56"
Your snippet will look like this:
for(let k = 0; k <= 21; k++) {
const text = await page.evaluate((nth) => {
return document.querySelector(
'div.ui-table__row:nth-child('+ nth +') > a:nth-child(1) > div:nth-child(2)'
).textContent; // Return `textContent` to "out side"
}, k)
console.log(text);
}