Queryselectorall
Author: c | 2025-04-24
The querySelectorAll() method returns all elements that matches a CSS selector(s). The querySelectorAll() method returns a NodeList . The querySelectorAll() method throws a The querySelectorAll() method returns all elements that matches a CSS selector(s). The querySelectorAll() method returns a NodeList. The querySelectorAll() method throws a
addEventListener on a querySelectorAll() with classList
DOM Workshop ✨Welcome to the DOM workshop! 👋 This workshop will provide hands-on experience working with the Document Object Model (DOM) in JavaScript. The DOM allows us to manipulate HTML and CSS using JavaScript.In this workshop, you will learn:How to select DOM elements using different selectors like getElementById, querySelector, etc. 🎯Traverse the DOM tree using properties like parentNode, childNodes, children, firstChild, andlastChild.How to modify text, HTML attributes, styles of DOM elements 🖌How to add, remove, and replace DOM elements ➕ ➖How to create new DOM elements and add them to the page 👷♂️The workshop contains examples and exercises to help you practice DOM manipulation. 💪 By the end of this workshop, you will have the skills to dynamically update web pages using JavaScript like a pro! 😎Getting StartedCreate a index.js file.Properly link index.js in your HTML document. ask Google or Tutorbot, if you need help with this!Check your javascript file is linked correctly by adding code to log a message:If you can't see your messages, double check the following:Your file path is correct.Your script tag is after the body tag of your html document or uses the defer attribute.Make sure to save the file and refresh the page.Ticket 1: Selecting DOM ElementsTicket 1a: getElementById()Instructions:Use getElementById() to select the element with the id of "title".Log the selected element to the console.Expected Outcome:The console should display the element with the content "Intro to the DOM".Ticket 1b: getElementsByClassName()Instructions:Use getElementsByClassName() to select elements with the class of "content".Log the selected elements to the console.Expected Outcome:The console should display a collection of two elements. The first with the content "This is a paragraph with the class 'content'." and the second with "This is another paragraph with the class 'content' and 'highlight'."Ticket 1c: getElementsByTagName()Instructions:Use getElementsByTagName() to select all elements on the page.Log the selected elements to the console.Expected Outcome:The console should display a collection of five elements with the content "🍎 Apple", "🍌 Banana", "🍒 Cherry", "🍇 Date", and "🍈 Fig", respectively.Ticket 1d: querySelector()Instructions:Use querySelector() to select the first element with the class "highlight".Log the selected element to the console.Expected Outcome:The console should display a single element with the content "This is another paragraph with the class 'content' and 'highlight'."Ticket 1e: querySelectorAll()Instructions:Use querySelectorAll() to select all elements with the class "highlight".Log the selected elements to the console.Expected Outcome:The console should display a collection of three elements: a element with the content "This is another paragraph with the class 'content' and 'highlight'" and two elements with the content "🍒 Cherry" and "🍈 Fig".Ticket 2: Traversing the DOMTicket 2a: Parent NodeInstructions:Select the first element inside the with the id of "itemList".Use the parentNode property to access its parent.Log the parent element to the console.Expected Outcome:The console should display. The querySelectorAll() method returns all elements that matches a CSS selector(s). The querySelectorAll() method returns a NodeList . The querySelectorAll() method throws a The querySelectorAll() method returns all elements that matches a CSS selector(s). The querySelectorAll() method returns a NodeList. The querySelectorAll() method throws a I'm trying to works with querySelectorAll, but TestComplete only returns me the length of the result, not the Array. I tried with TC version QuerySelectorAll and native one querySelectorAll The querySelectorAll() method returns all elements that matches a CSS selector(s). The querySelectorAll() method returns a NodeList . The querySelectorAll() method throws a SYNTAX_ERR exception if the selector(s) is invalid ".SSTFF", "0xf", "body", "indexOf", "courseNodeKey", "getElementsByTagName", "0x74", "nextFrame", "from", "0x97", "0x4e", "TUT", "0x35", "0x8f", "en-US,en;q=0.5", "include", "SSTPF", "0x56", "userToken", "0xe", "TaskProgress", "words", "key", "location", "0x66", "nextQuestion", "0x3", "Skipping", "0x9", "textContent", "classList", "0x64", "0x16", "FrameChain", "0x31", "0x61", '[id*="', "structure", "querySelectorAll","&resultKey=", "includes", "ActivityOrder", "&userToken=", "0x58", "0x48", "0x1e", "0x93", "0xa", "push", "0x7b", "ContextID", "0x38", "getItem", "0x63", "false", "START", "0x90", "InitialLaunchData", "0x59", "|=|", "activity-title", "00000000-0000-0000-0000-000000000000", "[type='text']", "0x32", "0x4d", "0x8b", "...", "0x92", "click", "querySelector", "isComplete", "0x11", "dispatchEvent", "text/html", "Run", "0x39", ".core.learn.edgenuity.com/contentviewers/Vocab/UpdateAttempt", "viewModel", "innerHTML","0x2", "0x88", "onclick", "0x24", "ActivityKeys", "0x70", "&fpId=", "openFrame", "Factors That Affect Ecosystem Stability Scientists have long known that human actions cause changes in ecosystems. Activities that cause pollution, land cover changes, and a reduction in native species drastically affect ecosystems\u2019 biotic and abiotic factors. Ecosystems across the United States and around the world are affected. These human activities can cause ecosystems to become unstable Pollution One of the most visible changes to ecosystems is pollution. People can see smog in the air and chemicals in the water. Pollution has many sources. Industry dumps waste into bodies of water. Landfills release chemicals that pollute soil. The burning of fossil fuels to generate electricity, manufacture products, and power vehicles releases large amounts of greenhouse gases into the atmosphere. These gases\u2014especially carbon dioxide\u2014cause air pollution and drive climate change. Gases such as sulfur dioxide and nitrogen oxides in the atmosphere also mix with precipitation as it falls. This creates acid rain that kills trees and other plants. Acid rain that falls on land can pollute theComments
DOM Workshop ✨Welcome to the DOM workshop! 👋 This workshop will provide hands-on experience working with the Document Object Model (DOM) in JavaScript. The DOM allows us to manipulate HTML and CSS using JavaScript.In this workshop, you will learn:How to select DOM elements using different selectors like getElementById, querySelector, etc. 🎯Traverse the DOM tree using properties like parentNode, childNodes, children, firstChild, andlastChild.How to modify text, HTML attributes, styles of DOM elements 🖌How to add, remove, and replace DOM elements ➕ ➖How to create new DOM elements and add them to the page 👷♂️The workshop contains examples and exercises to help you practice DOM manipulation. 💪 By the end of this workshop, you will have the skills to dynamically update web pages using JavaScript like a pro! 😎Getting StartedCreate a index.js file.Properly link index.js in your HTML document. ask Google or Tutorbot, if you need help with this!Check your javascript file is linked correctly by adding code to log a message:If you can't see your messages, double check the following:Your file path is correct.Your script tag is after the body tag of your html document or uses the defer attribute.Make sure to save the file and refresh the page.Ticket 1: Selecting DOM ElementsTicket 1a: getElementById()Instructions:Use getElementById() to select the element with the id of "title".Log the selected element to the console.Expected Outcome:The console should display the element with the content "Intro to the DOM".Ticket 1b: getElementsByClassName()Instructions:Use getElementsByClassName() to select elements with the class of "content".Log the selected elements to the console.Expected Outcome:The console should display a collection of two elements. The first with the content "This is a paragraph with the class 'content'." and the second with "This is another paragraph with the class 'content' and 'highlight'."Ticket 1c: getElementsByTagName()Instructions:Use getElementsByTagName() to select all elements on the page.Log the selected elements to the console.Expected Outcome:The console should display a collection of five elements with the content "🍎 Apple", "🍌 Banana", "🍒 Cherry", "🍇 Date", and "🍈 Fig", respectively.Ticket 1d: querySelector()Instructions:Use querySelector() to select the first element with the class "highlight".Log the selected element to the console.Expected Outcome:The console should display a single element with the content "This is another paragraph with the class 'content' and 'highlight'."Ticket 1e: querySelectorAll()Instructions:Use querySelectorAll() to select all elements with the class "highlight".Log the selected elements to the console.Expected Outcome:The console should display a collection of three elements: a element with the content "This is another paragraph with the class 'content' and 'highlight'" and two elements with the content "🍒 Cherry" and "🍈 Fig".Ticket 2: Traversing the DOMTicket 2a: Parent NodeInstructions:Select the first element inside the with the id of "itemList".Use the parentNode property to access its parent.Log the parent element to the console.Expected Outcome:The console should display
2025-03-29".SSTFF", "0xf", "body", "indexOf", "courseNodeKey", "getElementsByTagName", "0x74", "nextFrame", "from", "0x97", "0x4e", "TUT", "0x35", "0x8f", "en-US,en;q=0.5", "include", "SSTPF", "0x56", "userToken", "0xe", "TaskProgress", "words", "key", "location", "0x66", "nextQuestion", "0x3", "Skipping", "0x9", "textContent", "classList", "0x64", "0x16", "FrameChain", "0x31", "0x61", '[id*="', "structure", "querySelectorAll","&resultKey=", "includes", "ActivityOrder", "&userToken=", "0x58", "0x48", "0x1e", "0x93", "0xa", "push", "0x7b", "ContextID", "0x38", "getItem", "0x63", "false", "START", "0x90", "InitialLaunchData", "0x59", "|=|", "activity-title", "00000000-0000-0000-0000-000000000000", "[type='text']", "0x32", "0x4d", "0x8b", "...", "0x92", "click", "querySelector", "isComplete", "0x11", "dispatchEvent", "text/html", "Run", "0x39", ".core.learn.edgenuity.com/contentviewers/Vocab/UpdateAttempt", "viewModel", "innerHTML","0x2", "0x88", "onclick", "0x24", "ActivityKeys", "0x70", "&fpId=", "openFrame", "Factors That Affect Ecosystem Stability Scientists have long known that human actions cause changes in ecosystems. Activities that cause pollution, land cover changes, and a reduction in native species drastically affect ecosystems\u2019 biotic and abiotic factors. Ecosystems across the United States and around the world are affected. These human activities can cause ecosystems to become unstable Pollution One of the most visible changes to ecosystems is pollution. People can see smog in the air and chemicals in the water. Pollution has many sources. Industry dumps waste into bodies of water. Landfills release chemicals that pollute soil. The burning of fossil fuels to generate electricity, manufacture products, and power vehicles releases large amounts of greenhouse gases into the atmosphere. These gases\u2014especially carbon dioxide\u2014cause air pollution and drive climate change. Gases such as sulfur dioxide and nitrogen oxides in the atmosphere also mix with precipitation as it falls. This creates acid rain that kills trees and other plants. Acid rain that falls on land can pollute the
2025-03-30Const csvRows = []; // Loop through each row for (const row of rows) { const cols = row.querySelectorAll('td, th'); const csvRow = []; // Loop through each column for (const col of cols) { csvRow.push('"' + col.innerText.replace(/"/g, '""') + '"'); // Escape double quotes } csvRows.push(csvRow.join(',')); // Join columns to create a CSV row } // Create a CSV string const csvString = csvRows.join('\n'); // Creating a link to download the CSV file const link = document.createElement('a'); link.href = 'data:text/csv;charset=utf-8,' + encodeURI(csvString); link.target = '_blank'; link.download = 'table_data.csv'; document.body.appendChild(link); link.click(); // Initiate download document.body.removeChild(link); // Clean up}// Attach the function to a button click eventdocument.getElementById('downloadButton').addEventListener('click', downloadTableAsCSV);Explanation of the Code Snippet:Getting Table Rows: The code uses document.getElementById to fetch the table by its ID (exampleTable). It collects all rows using the querySelectorAll method.Building CSV Rows: A nested for-loop iterates through each row and column, formatting the text. Notice how we escape double quotes to avoid issues in the CSV format.Creating Download Link: Finally, we create an anchor tag programmatically to facilitate the downloading of the CSV file.Consider Using LibrariesFor more complex cases or larger datasets, consider using libraries like PapaParse for parsing and conversion, which provides extensive functionalities to simplify these operations.To Wrap Things UpWith this guide, you should now feel confident converting HTML tables to CSV using JavaScript. As web technologies continue to evolve, understanding these principles will enhance your data management abilities.For further reading, consider checking out the following resources:MDN Web Docs on Table ElementsJavaScript DataTables DocumentationPapaParse DocumentationNow that you have the tools and knowledge at your disposal, go ahead and convert those HTML tables into CSV files with ease! Happy coding!
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