You may use prepend to add the paragraph at the top of the container: // HTML: <div><p>Lorem ipsum</p></div> $(‘div’).prepend(‘<p>Bla bla bla’); Update: Regarding your comment about how to fade in the paragraph – use fadeIn: $(“#pcontainer”).prepend($(‘<p>This paragraph was added by jQuery.</p>’).fadeIn(‘slow’)); A working demo: http://jsbin.com/uneso
You will need to setup a similar event to handle mouseout. Inside the mouseout event function, you can change the color back to the original color. var item = document.getElementById(“button”); item.addEventListener(“mouseover”, func, false); item.addEventListener(“mouseout”, func1, false); function func() { // not needed since item is already global, // I am assuming this is here just … Read more
You need to use val rather than value. $(“#fileinput”).val();
This is invalid: arr[i].el.addEventListener(‘click’, do_something(arr[i])); The listener must be a function reference. When you invoke a function as an argument to addEventListener, the function’s return value will be considered the event handler. You cannot specify arguments at the time of listener assignment. A handler function will always be called with the event being passed as … Read more
I’m very surprised no one answered this. You can just use the browser it self to do the escaping for you. No regex is better or safer than letting the browser do what it does best, handle HTML. function escapeHTML(str){ var p = document.createElement(“p”); p.appendChild(document.createTextNode(str)); return p.innerHTML; } or a short alternative using the Option() … Read more
Try: document.getElementById(“yourH1_element_Id”).innerHTML = “yourTextHere”;
This has been changed with DOM3! While the DOM level 2 events specification did state When the event reaches the target, any event listeners registered on the EventTarget are triggered. Although all EventListeners on the EventTarget are guaranteed to be triggered by any event which is received by that EventTarget, no specification is made as … Read more
All of your bullet points are correct, except: modern JS interpreters use JIT to improve the code performance and translate it to bytecode should be “…and translate it to native code”. SpiderMonkey (the JS engine in Firefox) worked as a bytecode interpreter for a long time before the current JS speed arms race. On Mozilla’s … Read more
Since at least Axel showed interest in an iterative solution, here it is: Given two trees which have identical structure, and a specified node within the first tree, locate the node in the second tree with the same position within the structure. If we have no other information about the two trees then the position … Read more
CSS doesn’t have to be evaluated by the browser No. CSS is a language that you write your stylesheets in, which then have to be loaded, parsed and evaluated by the browser; see below. jQuery has to be evaluated by the browser Yes, because… jQuery goes through a scripting language Yes. jQuery is written in … Read more