Extract text from a website

Questions & Suggestions
1

Hi!

This topic came up a few times here but I can't get my macro to work. Assume I've got a webpage with the following code in Chrome/Brave,Whatever:

<div class="buy-config__title">
<span class="js-buy-config-select-color buy-config-select-color sr-only">
Example
</span>
<strong class="style-no">
<span class="js-buy-config-color-code">
EXPL
</span>
<span>
Model XXX
</span>
</strong>
</div>

Now I want to extract the value of 'js-buy-config-color-code'. This is my macro:

screenshot_2024-02-28_15-38-40
screenshot_2024-02-28_15-38-40770×263 37.8 KB

But I can't get it to work. Nothing happens, not even an error. (I had JS errors before in the console - "Allow JavaScript from Apple Events" is activated). I'd appreciate any help. Thank you.

2

Tried it with a dot right before the selector [document.querySelector('.span.js-buy-config-color-code').innerText;], and now at least I get an error message:

Uncaught TypeError: Cannot read properties of null (reading 'innerText')
at :37:57
at :38:4

4

Thank you! This is certainly an interesting idea. But does it work just as quickly? This is an action I'd need hundreds of times a day so I'm looking for an efficient way to solve this problem. I'm wondering why my query does not work. I might have an error in the syntax but tried all the examples I could find (with 'value' instead of 'innerText', or even just the trainling dot e.g.).

I'm also thinking about using a command line tool like Cheerio or BeautifulSoup for this. But since the page is already loaded into the browser, I'd prefer to go this way.

5

According to ChatGPT, this should work:

document.querySelector('.js-buy-config-color-code')

-rob.

6

Great idea to ask ChatGPT! I often do this for RegEx but it didn't came to my mind in this occasion. It can be really helpful. And what can I say - this is right! document.querySelector('.js-buy-config-color-code').innerText returns the text inside of the element when entered in Chrome Console. And so does 'span.js-buy-config-color-code':

screenshot_2024-02-29_20-55-45
screenshot_2024-02-29_20-55-451022×206 19.7 KB

But (a very big BUT): the macro returns nothing! I do explicitely ask for Chromium, but tried that in Safari as well. The result is the same: nothing happens, and I can clearly confirm that by watching the console.

7

That's because your JavaScript should read

return document.query.....

Assuming you're using the most recent version of KM.

1 Like
8

sample
sample770×263 38.4 KB

Have you checked your settings behind the chevron to the left of the JS source text field ?

If Modern syntax is selected (the default) then you are returning no value, and need to prefix your document.querySelector expression with return.

See Modern Syntax in the Keyboard Maestro wiki.

1 Like
9

Hah! Of course I didn't check these settings! It is that simple! Now it works - with both, modern and not so modern syntax. I read about the changes concerning the syntax but somehow didn't dive deeper. Thank you all, thank you very much! I think I looked for the Syntax thing in the preferences menu on the right and didn't find it there, and then I quickly forgot about it. But that explains why I stumbled upon a JS error in Chrome, it was complaining about a closing bracket at some point which I didn't write and couldn't explain.

This is a great function. Too bad it doesn't work with Firefox. But that could make things a lot easier for my work, so I'll probably switch browsers for that.