Question 272339 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – How can I check if a text is present on a URL without declaring the exact text?

I am getting the error:
script.js:11 Uncaught TypeError: Cannot read properties of undefined (reading 'includes')

And I don’t understand why. Is the body const incorrect?
How can I fix this?

const checkForText = (url, text) => {
    const page = fetch(url, { mode: 'no-cors' });
    const body = page.text;


    if (body.includes(text)) {
        console.log(`Passed. "${text}" found on ${url}`);
    } else {
        console.error(`Failed. Did not find "${text}" on ${url}!`);
    }
}

checkForText('https://dsbelmex.biz/nosotros/', 'equilibrio');`

I tried a lot of different things, but nothing worked. I’m still learning JavaScript so I’m quite the beginner.

Tags:

2

Answers


  1. 0 
    const checkForText = async (url: string, text: string) => {
    const page = await fetch(url, { mode: 'no-cors' });
    const body = await page.text();


    if (body.includes(text)) {
        console.log(`Passed. "${text}" found on ${url}`);
    } else {
        console.error(`Failed. Did not find "${text}" on ${url}!`);
    }
}

await checkForText('https://dsbelmex.biz/nosotros/', 'equilibrio');
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  2. 0

    I wouldn’t recommend to try to access external websites directly or interact with the web in real-time to perform actions like searching a webpage for specific content, unless it is in your own server.

    However, I am providing you with a JavaScript function that you can use in your own web development project to search for a specific word on a webpage using JavaScript. You’ll need to run this code within a browser’s developer console or in a JavaScript environment to see the results. Good Luck!

    Example screenshot tested on my browser:
    enter image description here

    async function checkForText(url, word) {
  try {
    const response = await fetch(url, { mode: 'no-cors' });
    if (response.ok) {
      const text = await response.text();
      if (text.includes(word)) {
        return `Passed. "${word}" found on ${url}`;
      } else {
        return `Failed. Did not find "${word}" on ${url}!`
      }
    } else {
      return "Failed to fetch the page.";
    }
  } catch (error) {
    return "An error occurred: " + error.message;
  }
}

const url = "https://dsbelmex.biz/nosotros/";
const wordToSearch = "equilibrio";

checkForText(url, wordToSearch)
  .then(result => console.log(result))
  .catch(error => console.error(error));
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