How do browsers resolve conflicting classes?
Read about specificity: Simple explanation More in depth explanation Short answer: if two selectors have the same specificity, the last one to be declared wins.
dom
toDataURL not a function
getElementsByTagName returns a NodeList [docs], not a single element. Simply access the first element of the list: var src = can[0].toDataURL(“image/png”); If you want to get the data URL for each canvas, then you have to iterate over the list. Otherwise, giving the canvas an ID and retrieving the reference with getElementById might be more … Read more
How to convert String to DOM Document object in java?
you can try DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder(); InputSource is = new InputSource(); is.setCharacterStream(new StringReader(“<root><node1></node1></root>”)); Document doc = db.parse(is); refer this http://www.java2s.com/Code/Java/XML/ParseanXMLstringUsingDOMandaStringReader.htm
Swap two html elements and preserve event listeners on them
To swap two divs without losing event handlers or breaking DOM references, you can just move them in the DOM. The key is NOT to change the innerHTML because that recreates new DOM nodes from scratch and all prior event handlers on those DOM objects are lost. But, if you just move the DOM elements … Read more
Can I open a new window and populate it with a string variable?
Yes it’s possible… var wnd = window.open(“about:blank”, “”, “_blank”); wnd.document.write(html); That should do the trick.
Check if DOM Element is a checkbox
Using only vanilla javascript you could do if (el.type && el.type === ‘checkbox’) { … } or even shorter if ((el || {}).type === ‘checkbox’) { … } or in modern browsers you could use matches() if (el.matches(‘[type=”checkbox”]’) { … }
Constructing a DOMTokenList/DOMSettableTokenList instance
You cannot create an DOMTokenList or an DOMSettableTokenList directly. Instead you should use the class attribute to store and retrieve your data and perhaps map an ids attribute of your DOM element to the classList property. var element = document.querySelector(‘so-users’); element.ids = element.classList; You can use relList according to the documentation but classList is more … Read more
Testing Javascript that Manipulates the DOM
I have found the Javascript/DOM tests, especially for the simple interactions that you are describing, are not that useful. You’ll testing that things are set up right, and since jQuery is so declarative, your tests look a lot like your code. My current thinking is that if you are writing larger JS components, it makes … Read more
JavaScript’s document.querySelector() same as jQuery $() method?
Cross-browser and legacy support. You can also use getElementsByClassName() if you don’t want to use Jquery. There is a response to a post on devshed by user: KorRedDevil that may be of interest to you. I took your function from your post and made it return an array. After you have that array of elements, … Read more