I am creating a page in which a user can add a question and its solution, he can delete the problem and can also edit it dynamically using DOM in javascript. I want that whenever user clicks on edit button the textbox which appears get autofocus.
This the javascript code of my page...
var questionText;
var answerText;
var questionArray=[];
var answerArray=[];
var i=0;
var j=10000;
function addProblem(){
var body = document.getElementsByTagName('body')[0];
questionText = document.getElementById('questionId').value;
answerText = document.getElementById('answerId').value;
questionArray.unshift(questionText);
answerArray.unshift(answerText);
var myContainer = document.getElementById('container');
var myDiv = document.createElement("div");
var questionLogo = document.createElement("p");
questionLogo.id = "questionLogo";
var textNode = document.createTextNode("Question:");
var question = document.createElement("p");
question.id = "question";
var questionDetail = document.createTextNode(questionArray[0]);
var deleteButton = document.createElement("button");
deleteButton.innerHTML = "Delete";
deleteButton.id = i;
var editButton = document.createElement("button");
editButton.innerHTML = "Edit";
editButton.id = j;
var answerLogo = document.createElement("p");
answerLogo.id = "answerLogo"
var ansTextNode = document.createTextNode("Answer: ");
var answer = document.createElement("p");
answer.id = "answer";
var answerDetail = document.createTextNode(answerArray[0]);
var mybr = document.createElement("br");
if(i==0){
myContainer.appendChild(myDiv);
myDiv.appendChild(questionLogo);
questionLogo.appendChild(textNode);
questionLogo.appendChild(question);
question.appendChild(questionDetail);
myDiv.appendChild(answerLogo);
answerLogo.appendChild(ansTextNode);
answerLogo.appendChild(answer);
answer.appendChild(answerDetail);
answerLogo.appendChild(mybr);
myDiv.appendChild(deleteButton);
myDiv.innerHTML += ' ';
myDiv.appendChild(editButton);
}
else if (i > 0)
{
myContainer.insertBefore(myDiv,myContainer.firstChild);
myDiv.appendChild(questionLogo);
questionLogo.appendChild(textNode);
questionLogo.appendChild(question);
question.appendChild(questionDetail);
myDiv.appendChild(answerLogo);
answerLogo.appendChild(ansTextNode);
answerLogo.appendChild(answer);
answer.appendChild(answerDetail);
answer.appendChild(mybr);
myDiv.appendChild(deleteButton);
myDiv.innerHTML += ' ';
myDiv.appendChild(editButton);
}
i++;
j++;
myDiv.childNodes[7].addEventListener("click", function(){
var deleteElement = document.getElementById(this.id);
deleteElement.parentNode.parentNode.removeChild(deleteElement.parentNode);
});
myDiv.childNodes[9].addEventListener("click",function(){
var editElement = document.getElementById(this.id);
var quesEdit = editElement.parentNode.childNodes[1];
var quesEditText = quesEdit.innerHTML;
var ansEdit = editElement.parentNode.childNodes[4];
var ansEditText = ansEdit.innerHTML;
var editDiv1 = document.createElement("div");
editDiv1.id = "editDiv1"
var quesTextArea = document.createElement("textarea");
quesTextArea.innerHTML += quesEditText;
quesTextArea.focus();
var saveButton1 = document.createElement("button");
saveButton1.innerHTML = "Save";
editDiv1.appendChild(quesTextArea);
editDiv1.innerHTML += ' ';
editDiv1.appendChild(saveButton1);
quesEdit.parentNode.replaceChild(editDiv1,quesEdit);
var editDiv2 = document.createElement("div");
editDiv2.id = "editDiv2"
var ansTextArea = document.createElement("textarea");
ansTextArea.innerHTML += ansEditText;
var saveButton2 = document.createElement("button");
saveButton2.innerHTML = "Save";
editDiv2.appendChild(ansTextArea);
editDiv2.innerHTML += ' ';
editDiv2.appendChild(saveButton2);
ansEdit.parentNode.replaceChild(editDiv2,ansEdit);
});
}
I have tried to focus the textarea using
quesTextArea.focus();
but its not working where questextArea is the name of the textarea. Please help how i can do it.
For the element could be got focused, it must be in the DOM when you invoke focus on it. You should invoke focus function after replaceChild function
editDiv1.appendChild(quesTextArea);
editDiv1.appendChild(saveButton1);
quesEdit.parentNode.replaceChild(editDiv1,quesEdit);
quesTextArea.focus();
I've created a simple sample as below link, you could check it
https://jsfiddle.net/pd9c6c7a/3/
Add autofocus attribute to the textarea element. So that whenever it is appended to the DOM, will get cursor activated in it.
The 'textarea' has not been added to window to be shown, an element must be part of the document object tree. In case that didn't work, add a 50ms delay.
setTimeout(function(){e.focus();}, 50);
Try the following approach:
var body=document.getElementsByTagName('body')[0];
var quesTextArea=document.createElement("textarea");
var button=document.createElement("button");
button.innerHTML = "click Me";
button.addEventListener("click",function(e){
e.preventDefault();
quesTextArea.focus();
});
body.appendChild(quesTextArea);
body.appendChild(button);
<html>
<body>
<body>
</html>
Try to add preventDefault.
var div = document.getElementById('parent');
var txt = document.createElement('textarea');
div.appendChild(txt);
txt.focus();
<html>
<head></head>
<body>
<div id="parent">
<input type="text" value="" />
</div>
</body>
</html>
The element must be in the DOM when you invoke the focus function. Move your focus() function after the appendChild() is invoked.
quesTextArea.innerHTML += quesEditText;
var saveButton1=document.createElement("button");
saveButton1.innerHTML="Save";
editDiv1.appendChild(quesTextArea);
quesTextArea.focus();
Related
I have several buttons on my site that call a script to open the content into full screen and I also want to be able to click off the created div to close it. This works but after opening one container, which is deleted after, my program produces errors trying to click another button.
function closeDiv(evt) {
const maindiv = document.getElementById('div3');
let targetElement = evt.target;
do {
if (targetElement == maindiv.childNodes[1]) {
return;
}
targetElement = targetElement.parentNode;
} while (targetElement);
var viewpost = maindiv.childNodes[1];
viewpost.parentNode.removeChild(viewpost);
maindiv.classList.remove('viewcontainer');
};
function buttonClick(button) {
var div = button.parentElement.parentElement;
var clone = div.cloneNode(true);
var element = div.childNodes;
var username = element[1].innerText;
var title = element[7].innerText;
var contenttext = div.childNodes[3].value;
var clone = document.createElement('div');
clone.classList.add('viewcontainercon');
var viewuser = document.createElement('p');
viewuser.classList.add('viewcontaineruser');
var text = document.createTextNode(username);
viewuser.appendChild(text);
clone.appendChild(viewuser)
var viewtitle = document.createElement('p');
viewtitle.classList.add('viewcontainertitle');
var text = document.createTextNode(title);
viewtitle.appendChild(text);
clone.appendChild(viewtitle);
var viewcontent = document.createElement('p');
viewcontent.classList.add('viewcontainercontent');
var text = document.createTextNode(contenttext);
viewcontent.appendChild(text);
clone.appendChild(viewcontent);
document.getElementById('div3').classList.add('viewcontainer');
document.getElementById('div3').appendChild(clone);
document.addEventListener("click", function(event){
var isClickInside = button.contains(event.target);
if (!isClickInside) {
closeDiv(event);
}
});
}
The error is specifically `viewpost is undefined' in the closeDiv() function, which is strange since that shouldn't be called until after the click. Any ideas?
I am having trouble understanding why the text is not changing when I click the button. It is being executed right away when the page starts instead. I am not sure why this is happening because I told it to only execute when you click on the button.
<!DOCTYPE html>
<html id="all">
<head>
<head>
</head>
<title>Lab8</title>
<style></style>
</head>
<body>
<script>
var iDiv = document.createElement('div');
iDiv.id = 'block';
iDiv.className = 'block';
document.getElementsByTagName('body')[0].appendChild(iDiv);
iDiv.style.backgroundColor = "#d79365";
iDiv.style.padding = "40px";
var innerDiv2 = document.createElement('div');
innerDiv2.className = 'block-3';
iDiv.appendChild(innerDiv2);
innerDiv2.style.padding = "40px";
innerDiv2.style.textAlign = "center";
innerDiv2.innerHTML = "Here is changing the text: ";
//innerDiv2.innerHTML = "Text Change when button clicked";
//innerDiv2.style.textAlign = "center";
// Now create and append to iDiv
var innerDiv = document.createElement('div');
innerDiv.className = 'block-2';
// The variable iDiv is still good... Just append to it.
iDiv.appendChild(innerDiv);
innerDiv.innerHTML = "I'm the inner div";
innerDiv.style.padding = "40px";
innerDiv.style.backgroundColor = "#eac67a";
var ClickButton = document.createElement('button');
ClickButton.className = 'block-4';
iDiv.appendChild(ClickButton);
ClickButton.innerHTML = "Style";
ClickButton.style.margin = "auto";
ClickButton.style.display = "block";
ClickButton.style.width = "80px";
ClickButton.style.height = "50px";
ClickButton.style.top = "50px";
ClickButton.style.backgroundColor = "#233237";
ClickButton.style.color = "white";
function js_style(){
alert("hi");
document.querySelector("innerDiv2");
innerDiv2.style.fontSize = 'large';
innerDiv2.style.font = 'italic bold 20px arial,serif';
innerDiv2.style.color = "#eac67a";
};
document.getElementsByTagName('button').onclick = js_style();
</script>
</body>
The problem with your code is that getElementsByTagName returns a HTMLCollection - which behaves a little like an array, in that you can access the individual elements using array syntax like x[0]
However, as you're creating the button dynamically, you can dispense with that, and, in the process, dispense with last millennium code element.onclick=rubbish
var ClickButton = document.createElement('button');
ClickButton.addEventListener('click', js_style);
done
document.getElementsByTagName('button') returns a HTMLCollection.
Setting the 'onclick' value of the HTMLCollection does not set the 'onclick' handle of the button.
i could get the example to work by giving the button an id and retrieving the button via that id (rather than it's tag name):
https://jsfiddle.net/0L1kj3ja/
var iDiv = document.createElement('div');
iDiv.id = 'block';
iDiv.className = 'block';
document.getElementsByTagName('body')[0].appendChild(iDiv);
iDiv.style.backgroundColor = "#d79365";
iDiv.style.padding = "40px";
var innerDiv2 = document.createElement('div');
innerDiv2.className = 'block-3';
iDiv.appendChild(innerDiv2);
innerDiv2.style.padding = "40px";
innerDiv2.style.textAlign = "center";
innerDiv2.innerHTML = "Here is changing the text: ";
//innerDiv2.innerHTML = "Text Change when button clicked";
//innerDiv2.style.textAlign = "center";
// Now create and append to iDiv
var innerDiv = document.createElement('div');
innerDiv.className = 'block-2';
// The variable iDiv is still good... Just append to it.
iDiv.appendChild(innerDiv);
innerDiv.innerHTML = "I'm the inner div";
innerDiv.style.padding = "40px";
innerDiv.style.backgroundColor = "#eac67a";
var ClickButton = document.createElement('button');
ClickButton.id = 'btn';
ClickButton.className = 'block-4';
iDiv.appendChild(ClickButton);
ClickButton.innerHTML = "Style";
ClickButton.style.margin = "auto";
ClickButton.style.display = "block";
ClickButton.style.width = "80px";
ClickButton.style.height = "50px";
ClickButton.style.top = "50px";
ClickButton.style.backgroundColor = "#233237";
ClickButton.style.color = "white";
function js_style(){
alert("hi");
document.querySelector("innerDiv2");
innerDiv2.style.fontSize = 'large';
innerDiv2.style.font = 'italic bold 20px arial,serif';
innerDiv2.style.color = "#eac67a";
};
document.getElementById('btn').onclick = js_style;
instead of
document.getElementsByTagName('button').onclick = js_style();
try this :
var buttons = document.getElementsByTagName('button');
for (var i=0;i<buttons.length;i++)
{
buttons[i].onclick = js_style;
}
when you use js_style(); javascript will call that function so you should just introduce your function name to .onclick
You were attaching onclick event to collection of JS nodes. I've refactored your code and added one more class to button element to attachclick event on that.
It is always advisable to add class with js prefix to attach event handler to DOM elements. In this way,no one will mess with js-* classes.
//create outer div and apply styles
var outerDiv = document.createElement('div');
var outerDivStyle = 'background-color:#d79365;padding: 40px;';
outerDiv.id = 'block';
outerDiv.className = 'block';
document.getElementsByTagName('body')[0].appendChild(outerDiv);
outerDiv.style.cssText = outerDivStyle;
//create inner div and apply styles
var innerDiv = document.createElement('div');
innerDiv.className = 'block-3';
outerDiv.appendChild(innerDiv);
var innerDivStyle = 'padding: 40px;text-align:center;';
innerDiv.innerHTML = "Here is changing the text: ";
innerDiv.style.cssText = innerDivStyle;
//create last div and apply styles
var lastDiv = document.createElement('div');
lastDiv.className = 'block-2';
// The variable iDiv is still good... Just append to it.
outerDiv.appendChild(lastDiv);
lastDiv.innerHTML = "I'm the inner div";
var lastDivStyle = 'background-color:#eac67a;padding: 40px;';
lastDiv.style.cssText = lastDivStyle;
//create button
var clickButton = document.createElement('button');
clickButton.id = 'js-btn';
clickButton.className = 'block-4';
outerDiv.appendChild(clickButton);
var btnStyles = 'background-color:#233237;color: white;margin:auto;display:block;width: 80px; height:50px;';
lastDiv.style.cssText = lastDivStyle;
clickButton.innerHTML = "Style";
clickButton.style.cssText = btnStyles;
function jsStyle() {
alert("hi");
document.querySelector("innerDiv");
innerDiv.style.fontSize = 'large';
innerDiv.style.font = 'italic bold 20px arial,serif';
innerDiv.style.color = "#eac67a";
};
document.querySelector('#js-btn').onclick = jsStyle;
I am using only JavaScript to create buttons and need to add click handlers to the buttons that will replace the header with the contents of the buttons. I have been trying to figure out how to do this for a while. Any help would be great! Thank you!
Below is my JavaScript code that creates the buttons and header.
var col = document.createElement('div');
col.className = 'col';
document.body.appendChild(col);
var header = document.getElementById('col');
var h = document.createElement("H3");
h.innerHTML = "Nothing clicked yet!";
col.appendChild(h);
var divOne = document.createElement('div');
col.appendChild(divOne);
var btnOne = document.getElementById('col');
var textOne = ["1", "2", "3", "4"];
textOne.forEach(function(post) {
var postDiv = document.createElement("div");
postDiv.className = 'btn btn-default';
postDiv.innerHTML = post;
col.appendChild(postDiv);
});
Add an event to your button elements, but as other answers pointed out, a good practice is to assign IDs to your elements for more accurate lookup :
var btnOne = document.getElementById('col');
var textOne = ["Left", "Middle", "Right"];
textOne.forEach(function(post) {
var btnGroupFour = document.createElement('button');
btnGroupFour.className = 'btn btn-default';
btnGroupFour.innerHTML = post;
btnGroupFour.addEventListener("click", function() {
var header = document.getElementsByTagName('H3')[0];
header.innerHTML = this.innerHTML;
}, false);
divThree.appendChild(btnGroupFour);
});
First of all, you are not creating buttons, you're creating divs, although you're using the button classes from bootstrap (I gues...).
Anyway, the way to proceed would be to add a onclick attribute with a callback function, witch takes one argument: the event itself. Then, with the target attribute of the event object, you're getting access to the event source tag and with value you will get the value.
Just like this:
<input type="button" id="button" value="Test Value!" />
<span id="output"></span>
<script>
document.getElementById("button").addEventListener('click', callback);
function callback(e) { document.getElementById("output").innerHTML = e.target.value; }
</script>
Just assign an ID for your header, and while creating the buttons in the loop. Just assign the onclick callback of the button, to get the id of the header, and replace the text
textOne.forEach(function(post) {
var btnGroupFour = document.createElement('button');
btnGroupFour.className = 'btn btn-default';
btnGroupFour.innerHTML = post;
btnGroupFour.onclick = function(){document.getElementById('headerID').innerHTML = post} ;
h.appendChild(btnGroupFour);
});
Should Work for your situation.
A short Demo
Fairly simple, just add an eventListener onto the element during creation. All I really had to add to your code was: .addEventListener("click", function(){ h.innerHTML = post;});
http://www.w3schools.com/jsref/met_element_addeventlistener.asp
<!DOCTYPE html>
<html>
<body>
<p>Hover over the checkbox to simulate a mouse-click.</p>
<script>
var divContainer = document.createElement('div');
divContainer.className = 'container';
document.body.appendChild(divContainer);
var row = document.createElement('div');
row.className = 'row';
divContainer.appendChild(row);
var col = document.createElement('div');
col.id = 'col-md-12';
row.appendChild(col);
var header = document.getElementById('col');
var h = document.createElement("H3");
h.innerHTML = "Nothing clicked yet!";
col.appendChild(h);
var star = document.createElement('div');
col.appendChild(star);
var btnStar = document.getElementById('col');
var textStar = ["Star"];
textStar.forEach(function(post) {
var postStar = document.createElement("div");
postStar.className = 'btn btn-default';
postStar.innerHTML = post;
postStar.addEventListener("click", function(){
h.innerHTML = post;});
col.appendChild(postStar);
});
var secondLine = document.createElement("HR");
document.body.appendChild(secondLine);
col.appendChild(secondLine);
var divOne = document.createElement('div');
col.appendChild(divOne);
var btnOne = document.getElementById('col');
var textOne = ["1", "2", "3", "4"];
textOne.forEach(function(post) {
var postDiv = document.createElement("div");
postDiv.className = 'btn btn-default';
postDiv.innerHTML = post;
postDiv.addEventListener("click", function(){
h.innerHTML = post;});
col.appendChild(postDiv);
});
var btnTwo = document.getElementById('col');
var textTwo = ["5", "6", "7", "8"];
textTwo.forEach(function(post) {
var btnGroupFour = document.createElement('button');
btnGroupFour.className = 'btn btn-default';
btnGroupFour.innerHTML = post;
btnGroupFour.addEventListener("click", function(){
h.innerHTML = post;});
col.appendChild(btnGroupFour);
});
var secondLine = document.createElement("HR");
document.body.appendChild(secondLine);
col.appendChild(secondLine);
var divThree = document.createElement('div');
col.appendChild(divThree);
var btnOne = document.getElementById('col');
var textOne = ["Left", "Middle", "Right"];
textOne.forEach(function(post) {
var btnGroupFour = document.createElement('button');
btnGroupFour.className = 'btn btn-default';
btnGroupFour.innerHTML = post;
btnGroupFour.addEventListener("click", function(){
h.innerHTML = post;});
divThree.appendChild(btnGroupFour);
});
</script>
</body>
</html>
So I am creating div's onclick and giving them incrementally greater Id's. I want to then change the CSS properties of each div but I can't seem to select it with document.getElementById.
Obviously I'm missing something incredibly simple here, any advice or reading would be appreciated.
JS Fiddle
Some relevant Javascript:
function createDiv(){
i++;
var newDiv = document.createElement("div");
newDiv.id = "newDiv"+i;
var e = document.getElementById("newDiv1");
e.innerHTML = "hello";
e.className = "newDivs";
var x = 50*i;
e.style.left = x+"px";
e.style.top = 200+"px";
//but nothing appears
}
you have not attached your div to the DOM tree, you should first attach it then try to grab its reference:
function createDiv(){
i++;
var newDiv = document.createElement("div");
newDiv.id = "newDiv"+i;
document.body.appendChild(newDiv); // <--- Append it here
var e = document.getElementById("newDiv1");
e.innerHTML = "hello";
e.className = "newDivs";
var x = 50*i;
e.style.left = x+"px";
e.style.top = 200+"px";
//but nothing appears
}
You need to append the div into the dom see fiddle
http://jsfiddle.net/coqkg5oz/5/
function addDiv() {
var objTo = document.getElementById('container')
var divtest = document.createElement("div");
divtest.innerHTML = "new div"
objTo.appendChild(divtest)
}
You haven't added the element to the page, that's why it doesn't show up.
You don't need to use getElementById to get a reference to the element, as you already have a reference to the element.
Example:
function createDiv(){
i++;
var e = document.createElement("div");
e.id = "newDiv"+i;
document.body.appendChild(e);
e.innerHTML = "hello";
e.className = "newDivs";
var x = 50*i;
e.style.left = 100+"px";
e.style.top = 200+"px";
}
Demo: http://jsfiddle.net/Guffa/coqkg5oz/8/
When a client clicks the "buy" button, I create a popup on screen which allows them to fill in a purchase form. On the poput I want to have a "x" button so they can close it and return to the main website.
The code I run to generate the popup is:
var o = document.createElement('div');
o.className = 'overlay';
var p = document.createElement('div');
p.className = 'buyticketid';
p.setAttribute('id','buy-ticket');
var cb = document.createElement('p');
cb.className = 'closeButton';
cb.setAttribute('onclick','close()');
cb.setAttribute('title','Close');
cb.setAttribute('id','close-btn');
var x = document.createTextNode('x');
cb.appendChild(x);
p.appendChild(cb);
document.getElementsByTagName('body')[0].appendChild(o);
document.getElementsByTagName('body')[0].appendChild(p);
The code I use to try and delete the popup (ID = 'buy-ticket') is:
function close(){
var element = document.getElementById("buy-ticket");
element.parentNode.removeChild(element);
}
For some reason when I click the close button nothing happens. If anyone could point me in the right direction that would be awesome.
you can assign a click handler to a dom element like this: element.onclick = callback; where callback is your callback function.
This works as expected:
function close(){
var element = document.getElementById("buy-ticket");
element.parentNode.removeChild(element);
}
var o = document.createElement('div');
o.className = 'overlay';
var p = document.createElement('div');
p.className = 'buyticketid';
p.setAttribute('id','buy-ticket');
var cb = document.createElement('p');
cb.className = 'closeButton';
cb.onclick = close;
cb.setAttribute('title','Close');
cb.setAttribute('id','close-btn');
var x = document.createTextNode('x');
cb.appendChild(x);
p.appendChild(cb);
document.getElementsByTagName('body')[0].appendChild(o);
document.getElementsByTagName('body')[0].appendChild(p);