I wanted to make a function with onclick where if I press the div the content should be displayed. If I click on that content it will give me the "starting"-form.
Let me show you the code:
HTML:
<div id="demo">click</div>
Javascript:
var div = document.getElementById("demo");
var info = "This is the information for the user.";
var status = true;
if(status){
div.onclick = function() { div.innerHTML = info };
status=false;
}
else {
div.onclick = function() { div.innerHTML = "click" };
status=true;
}
So I made a variable status that checks what is being shown.
I hope i could express myself good enough. :)
The if statement is not going to magically run again. You need to do the check inside the click. Do not try to bind separate click events.
(function () {
var div = document.getElementById("demo");
var info = "This is the information for the user.";
var status = false;
div.addEventListener("click", function() {
status = !status;
div.innerHTML = status ? info : "click";
});
}());
<div id="demo">click</div>
Related
In my project, I've added the alert box and try to close the box if the user clicks on disclose button. But I don't know why this if condition is not executed.
can anyone tells me where I did make a mistake?
window.onload = function(){
var button = document.querySelector(".close");
var successMessage = document.querySelector(".messageStackSuccess");
var messageStack = document.querySelector(".messageStackError");
// console.log(successMessage.className);
button.onclick = function () {
if (messageStack.className == "messageStackError") {
messageStack.classList.add("displayNone");
}
else if (successMessage.className == "messageStackSuccess") {
successMessage.classList.add("displayNone");
}
};
};
Need help making a simple text editor :
Text is displayed on screen
Click on Text to change it
Click change button to see the changes
but program goes in an infinite oop
var creators = {
hTag :function(textToInput){
var h1 = document.createElement('h1');
var div = document.getElementById('main');
div.innerHTML = '';
h1.id = 'userText';
h1.textContent = textToInput;
div.appendChild(h1);
console.log(div);
listeners.hTagListener();
//document.querySelector('h1');
//hTag.addEventListener('click',this.);
},
changeField :function(){
var input = document.createElement('input');
var button = document.createElement('button');
var div = document.getElementById('main');
div.innerHTML='';
button.id = 'changeButton';
button.textContent = 'Change';
input.id = 'input';
input.type = 'text';
div.appendChild(button);
div.appendChild(input);
listeners.changeButtonListener();
}
};
var listeners = {
hTagListener : function(){
var h1Print = document.querySelector('h1');
h1Print.addEventListener('click',creators.changeField());
console.log('added event listener');
},
changeButtonListener : function(){
var but = document.getElementById('changeButton');
var inputText = document.getElementById('input');
console.log(inputText.value);
but.addEventListener('click',creators.hTag(inputText.value));}
};
creators.hTag('initialValue');
and my Main HTML is
<body>
<br>
<br>
<div id="main">
</div>
<script src="/script.js" defer></script>
Expected :
In the last line of javascript, a header tag is appended to div
which has textContent 'initialValue'.
After Clicking on it :
A text Field and change button should appear,on clicking change, new Value must be displayed as Header!
Actual :
Program goes in an infinite loop!
While adding event listener you are calling actual function instead of that you should just bind the event the modified code is below
var listeners = {
hTagListener : function(){
var h1Print = document.querySelector('h1');
h1Print.addEventListener('click',creators.changeField);
console.log('added event listener');
},
changeButtonListener : function(){
var but = document.getElementById('changeButton');
var inputText = document.getElementById('input');
but.addEventListener('click',function(){creators.hTag(inputText.value)},false);
}
Currently addEventListener click methods are directly executing onload of the screen. Due to this execution is going for the infinite loop. To avoid this bind the method as below
var listeners = {
hTagListener : function(){
var h1Print = document.querySelector('h1');
h1Print.addEventListener('click',creators.changeField.bind(this), false);
console.log('added event listener');
},
changeButtonListener : function(){
var but = document.getElementById('changeButton');
var inputText = document.getElementById('input');
console.log(inputText.value);
but.addEventListener('click',creators.hTag.bind(this, inputText.value));
}
};
Here's the code I'm currently using
function firstChildAge() {
var header = document.createElement('H3');
var body = document.getElementsByTagName('BODY');
var textnode = document.createTextNode("WHAT IS THE AGE OF THE FIRST CHILD?");
var inputChildOne = document.createElement("Input");
var childOneAgeResponse = inputChildOne.value;
header.appendChild(textnode);
document.body.appendChild(header);
document.body.appendChild(inputChildOne);
}
function submitButton() {
var btn = document.createElement('Button');
document.body.appendChild(btn);
btn.onClick = testFunction_2();
}
function testFunction_2() {
alert("foo");
}
if (childrenResponse == 1) {
firstChildAge();
submitButton();
}
As you can see, if childrenResponse (the user's response to a previous query) is equal to 1, both functions are activated. The attempted goal is to create a text node, an input, and a button. The button as of right now, should active testFunction2() which alerts us that it is working. But, testFunction2() activates before the text node or input even shows up. I can find the reason for this, and if anyone can help me out I'd greatly appreciate it. Thank you.
Also, on a side note, how can I add text to the button created in submitButton() ? Thanks!
You have called the testFunction_2, instead of assigning it. This should work out fine.
function submitButton() {
var btn = document.createElement('Button');
btn.onclick = testFunction_2;
document.body.appendChild(btn);
}
You are calling the function testFunction_2() in onClick. You need to add event listener to button as shown below
btn.addEventListener('click', testFunction_2);
To add text to button use
var txt = document.createTextNode("CLICK ME");
btn.appendChild(txt);
Check the snippet below
function firstChildAge() {
var header = document.createElement('H3');
var body = document.getElementsByTagName('BODY');
var textnode = document.createTextNode("WHAT IS THE AGE OF THE FIRST CHILD?");
var inputChildOne = document.createElement("Input");
var childOneAgeResponse = inputChildOne.value;
header.appendChild(textnode);
document.body.appendChild(header);
document.body.appendChild(inputChildOne);
}
function submitButton() {
var btn = document.createElement('Button');
var txt = document.createTextNode("CLICK ME");
btn.appendChild(txt);
document.body.appendChild(btn);
btn.addEventListener('click', testFunction_2);
}
function testFunction_2() {
alert("foo");
}
childrenResponse = 1;
if (childrenResponse == 1) {
firstChildAge();
submitButton();
}
You are calling the function testFunction_2 in onClick. You need to provide reference.
That also won't work. You need to add event listener to button.
And for setting the text, just set innerHTML of button.
var btn = document.createElement('Button');
btn.innerHTML = "click";
btn.addEventListener('click', testFunction_2);
document.body.appendChild(btn);
btn.onclick = testFunction_2; // in place of addEventListener.
// if you want to use onclick. use small case 'c' in onclick.
There were 2 problems:
onClick should've been onclick.
You were executing the function and assigning the result of that function to the onclick. btn.onClick = testFunction_2(); should be btn.onClick = testFunction_2;
See working snippet below.
function firstChildAge() {
var header = document.createElement('H3');
var body = document.getElementsByTagName('BODY');
var textnode = document.createTextNode("WHAT IS THE AGE OF THE FIRST CHILD?");
var inputChildOne = document.createElement("Input");
var childOneAgeResponse = inputChildOne.value;
header.appendChild(textnode);
document.body.appendChild(header);
document.body.appendChild(inputChildOne);
}
function testFunction_2() {
alert("foo");
}
function submitButton() {
var btn = document.createElement('button');
btn.innerHTML = "Some button name";
btn.onclick = testFunction_2;
document.body.appendChild(btn);
}
var childrenResponse = 1;
if (childrenResponse == 1) {
firstChildAge();
submitButton();
}
In javascript you can use the innerHTML set the button's HTML contents.
See Setting button text via javascript
btn.innerHTML = "This is a button name";
The Mozilla Developer Network is a good resource. Here's two links for the above mentioned snippets.
MDN innerHTML
MDN HTML Button element
I have a div that I'm appending to another div when a button is clicked. I'm also calling a bunch of functions on the div that gets created.
HTML
<a onClick="drawRect();">Rect</a>
JS
function drawRect(){
var elemRect = document.createElement('div');
elemRect.className = 'elem elemRect';
elemRect.style.position = "absolute";
elemRect.style.background = "#ecf0f1";
elemRect.style.width = "100%";
elemRect.style.height = "100%";
elemRect.style.opacity = "100";
renderUIObject(elemRect);
$('.elemContainer').draggableParent();
$('.elemContainer').resizableParent();
makeDeselectable();
handleDblClick();
}
var createDefaultElement = function() {
..
..
};
var handleDblClick = function() {
..
..
};
var renderUIObject = function(object) {
..
..
};
var makeDeselectable = function() {
..
..
};
I could clone the element when the browser detects a keydown event
$(window).keydown(function(e) {
if (e.keyCode == 77) {
$('.ui-selected').clone();
return false;
}
});
then append it to #canvas. But the problem is, none of the functions I mentioned above get called with this method.
How can I copy/paste an element (by pressing CMD+C then CMD+V) and call those above functions on the cloned element?
The jQuery.clone method returns the cloned node. So you could adjust your code to do something like this:
var myNodes = $('.ui-selected').clone();
myNodes.each(function () {
createDefaultElement(this);
appendResizeHandles(this);
appendOutline(this);
});
function getH4() {
var xyz = document.getElementsByClassName('bucket_left');
for(var i=0;i<xyz.length;i++){
var x=document.getElementsByTagName("h4")[i].innerHTML;
var current_bucket = xyz[i];
var y=current_bucket.firstChild.href;
var newdiv = document.createElement('div');
newdiv.innerHTML = ""+x+"";
newdiv.className = "hover_title_h4";
current_bucket.appendChild(newdiv);
}
}
window.onscroll=getH4;
In above code i want to append new div in set of divs having class bucket_left and this divs generated from infinite scrolling. above code is working fine but on scroll it appends so many divs.
so how do i append only once ?
Add the following line at the end of your function:
function getH4() {
// ...
window.onscroll = null;
}
create a global boolean variable and set it to false. again set it to true in the window scroll event and chk the variable is false using a if block. put your code inside that if block.
var isScrolled = false;
function getH4() {
if(!isScrolled){
//your code
}
isScrolled = true
}
You only have to set the onscroll property to none as following at the end of you JavaScript function:
window.onscroll = null;
Now when the script executes for the first time, it will perform its function and the above line will set the onscroll to null and thus will not invoke any event on scroll of your mouse and so your function wont be invoked again and again on the event except for the first time.
Or you could handle it logically by setting a public var say var check = 0 and then set the variable to 1 when entered for the first time. So you need to check the value of check and based on that execute the function
var check = 1;
function getH4() {
if(check==1)
{
var xyz = document.getElementsByClassName('bucket_left');
for(var i=0;i<xyz.length;i++){
var x=document.getElementsByTagName("h4")[i].innerHTML;
var current_bucket = xyz[i];
var y=current_bucket.firstChild.href;
var newdiv = document.createElement('div');
newdiv.innerHTML = ""+x+"";
newdiv.className = "hover_title_h4";
current_bucket.appendChild(newdiv);
}
check=0;
}
}
you can try this:
when scrolling,the check equal false, and the append event will happen just once;
when the scroll end(mouseup or mouseout), the check equal true, you can append again.
var check = true;
function getH4(event) {
event.target.onmouseup = function() {
check = true;
}
event.target.onmouseout = function() {
check = true;
}
if (check) {
var xyz = document.getElementsByClassName('bucket_left');
for(var i=0;i<xyz.length;i++){
var x=document.getElementsByTagName("h4")[i].innerHTML;
var current_bucket = xyz[i];
var y=current_bucket.firstChild.href;
var newdiv = document.createElement('div');
newdiv.innerHTML = ""+x+"";
newdiv.className = "hover_title_h4";
current_bucket.appendChild(newdiv);
}
check = false;
}
window.onscroll=getH4