JavaScript executor basics in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to execute JavaScript that returns the page title.

Selenium Python

title = driver.execute_script([1])

Drag options to blanks, or click blank then click option'

A"return document.title"

B"document.title"

C"return title"

D"document.getTitle()"

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the return keyword causes the result to be None.

Using incorrect JavaScript syntax like document.getTitle() which does not exist.

The JavaScript code must return the document title explicitly using return document.title for Selenium to capture it.

2fill in blank

medium

Complete the code to scroll the page down by 500 pixels using JavaScript executor.

Selenium Python

driver.execute_script([1])

Drag options to blanks, or click blank then click option'

A"window.scroll(500, 0)"

B"scrollTo(0, 500)"

C"scrollBy(500, 0)"

D"window.scrollBy(0, 500)"

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping x and y values causes horizontal scrolling instead of vertical.

Using scrollTo without window. prefix may cause errors.

The correct JavaScript to scroll vertically down by 500 pixels is window.scrollBy(0, 500).

3fill in blank

hard

Fix the error in the code to click an element using JavaScript executor.

Selenium Python

driver.execute_script("arguments[0].[1]();", element)

Drag options to blanks, or click blank then click option'

AclickElement

Bclick

CclickOn

Dclicker

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent method names causes JavaScript errors.

Misspelling the method name leads to runtime failures.

The correct JavaScript method to simulate a click is click(). Other options are invalid method names.

4fill in blank

hard

Fill both blanks to return the inner text of an element using JavaScript executor.

Selenium Python

text = driver.execute_script("return arguments[[1]].[2]", element)

Drag options to blanks, or click blank then click option'

A0

B1

CinnerText

DtextContent

Attempts:

3 left

💡 Hint

Common Mistakes

Using argument index 1 causes undefined errors.

Using incorrect property names causes empty or undefined results.

The first argument index is 0 because element is the first argument. To get visible text, textContent is a reliable property.

5fill in blank

hard

Fill all three blanks to set the value of an input element using JavaScript executor.

Selenium Python

driver.execute_script("arguments[[1]].[2] = arguments[[3]]", input_element, value)

Drag options to blanks, or click blank then click option'

A0

B1

Cvalue

D"value"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up argument indexes causes errors or no effect.

Using string literal "value" instead of variable causes wrong assignment.

The input element is the first argument (index 0), so use arguments[0]. The property to set is value. The value to assign is the second argument (index 1), so arguments[1].