I only want to remove images from a content div, not the whole site. I have tried the following:
var elements = document.getElementsByTagName('img');
for (var i = 0; i < elements.length; i++) {
elements[i].style.display = 'none';
}
That removes every image.
var elements = document.getElementsById('content').document.getElementsByTagName('img');
for (var i = 0; i < elements.length; i++) {
elements[i].style.display = 'none';
}
That did nothing.
Can someone tell me what I am doing wrong?
var elements = document.getElementsById('content').document.getElementsByTagName('img');
should be
var elements = document.getElementsById('content').getElementsByTagName('img');
var elements = document.getElementsById('content').getElementsByTagName('img');
for (var i = 0; i < elements.length; i++) {
elements[i].style.display = 'none';
}
if using jQuery
$('#content img').hide();
Related
there is some images with grayscale(1) by default and when you hover on images it should change to grayscale(0), all of this is on css file. but i want when i click on it or when i hover on it, on both situations the image gets grayscale(0) but the hover effect doesn't work. i tried to put the code for grayscale(0) on an addEventListener in another function but it didn't work.
update:
i added codpen link and one line of code.
as you can see from the beginning left person is coloured because i'm showing their info. i want that when i hover on other persons, they get coloured theme while the person that their info is up is still coloured.
link
showInfo(0);
function showInfo(person) {
var img, info, names;
names = document.querySelectorAll('.box h2');
for (let i = 0; i < names.length; i++) {
names[i].style.display = 'none';
}
names[person].style.display = 'block';
info = document.querySelectorAll('.info p');
for (let i = 0; i < info.length; i++) {
info[i].style.display = 'none';
}
info[person].style.display = 'block';
img = document.querySelectorAll('.images img');
for (let i = 0; i < img.length; i++) {
img[i].style.filter= 'grayscale(1)';
}
img[person].style.filter= 'grayscale(0)';
}
I have updated your showInfo function:
function showInfo(person) {
var img, info, names;
names = document.querySelectorAll('.box h2');
for (let i = 0; i < names.length; i++) {
names[i].style.display = 'none';
}
names[person].style.display = 'block';
info = document.querySelectorAll('.info p');
for (let i = 0; i < info.length; i++) {
info[i].style.display = 'none';
}
info[person].style.display = 'block';
img = document.querySelectorAll('.images img');
for (let i = 0; i < img.length; i++) {
img[i].style.filter= '';
}
img[person].style.filter= 'grayscale(0)';
}
showInfo(0);
The change is very small and that gets you to the required behaviour:
for (let i = 0; i < img.length; i++) {
img[i].style.filter= '';
}
Hello i want to remove "Have you served in the military ?" and "No" if Answer is "No" but when it will "Yes" than it should show.
Whatever i have tried but it's not working
<script type="text/javascript">
(function(){
for(i = 0; (a = document.getElementsByTagName("td")[i]); i++){
if(document.getElementsByTagName("span")[i].innerHTML.indexOf('Have you served in the military') > -1){
document.getElementsByTagName("td")[i].style.display = "none";
}
}
})();
</script>
You could use child of the element or just do a find replace or even hide and show.
You can get all td elements like you already did and than get the span elements inside them:
var tds = document.getElementsByTagName('TD');
for (var i = 0, l = tds.length; i != l; ++i) {
var spans = tds[i].getElementsByTagName('SPAN');
for (var j = 0, l2 = spans.length; j != l2; ++j) {
var span = spans[j];
if ((span.textContent = span.innerText).indexOf('Have you served in the military') != -1) {
span.style.display = 'none';
break;
}
}
}
EDIT: OP wants to only delete the span if there is a td with the content "No" (also delete the td element)
var tds = document.getElementsByTagName('TD');
var tdsLength = tds.length;
var answerNoFound = false;
for (var i = 0; i != tdsLength; ++i) {
var td = tds[i];
if ((td.textContent = td.innerText) == 'No') {
td.style.display = 'none';
answerNoFound = true;
break;
}
}
if (answerNoFound)
for (var i = 0; i != tdsLength; ++i) {
var spanFound = false;
var spans = tds[i].getElementsByTagName('SPAN');
for (var j = 0, l = spans.length; j != l; ++j) {
var span = spans[j];
if ((span.textContent = span.innerText).indexOf('Have you served in the military') != -1) {
span.style.display = 'none';
spanFound = true;
break;
}
}
if (spanFound)
break;
}
It looks like you have an application form and document probably has more spans, some outside the td elements, so you don't get correct selection of spans versus td.
So when you are comparing span content, it is most likely not the span that is inside your looped td.
<script type="text/javascript">
(function(){
for(i = 0; (a = document.getElementsByTagName("td")[i]); i++){
if(a.getElementsByTagName("span")[0].innerHTML.indexOf('Have you served in the military') > -1){
a.style.display = "none";
}
}
})();
</script>
I changed the if statement to select span inside your looped td, that should do it.
I am trying to write a javascript for hidding all elements of the class "prewrap", when any image on
the webpage is clicked.
Code so far:
<script type="text/javascript">
function hidepre() {
var elems = document.getElementsByClassName("prewrap");
for (var i = 0; i < elems.length; i++) {
if (elems[i].style.visibility === "hidden") {
elems[i].style.visibility = "visible";
} else {
elems[i].style.visibility = "hidden";
}
}
}
var imgs = document.getElementsByTagName("img");
for (var i = 0; i < imgs.length; i++) {
imgs[i].onclick = "hidepre()";
}
</script>
Jsfiddle: http://jsfiddle.net/aX5kQ/
But this is not working at all, any idea what went wrong?
Your code is working, check this fiddle DEMO
EDIT
Remove the script tag from your jsfiddle leave only the code.
function hidepre() {
var elems = document.getElementsByClassName("prewrap");
for (var i = 0; i < elems.length; i++) {
if (elems[i].style.display === "none") {
elems[i].style.display = "block";
} else {
elems[i].style.display = "none";
}
}
}
var imgs = document.getElementsByTagName("img");
for (var i = 0; i < imgs.length; i++) {
imgs[i].onclick = hidepre;
}
Also in your post this line should be corrected ->
var imgs = document.getElementsByTagName("img");
for (var i = 0; i < imgs.length; i++) {
imgs[i].onclick = hidepre; //this line - here should only be the name of the function without quotes and parentheses
}
It works just fine if you remove the script tag from the JS area of jsfiddle (you put raw javascript in there.. no tags)
edited demo at http://jsfiddle.net/aX5kQ/1/
Hi this code is executed immediately before the image is loaded and so no img is found.
var imgs = document.getElementsByTagName("img");
for (var i = 0; i < imgs.length; i++) {
imgs[i].onclick = "hidepre()";
}
Execute this when the DOM is finished loading with window.onload = ...
I have the following list hierarchy:
<ul id="ulid">
<li><a><div class="mydiv">content</div></a></li>
<li><a><div class="mydiv">content</div></a></li>
...
</ul>
I want to add some css rules to the div and this is what i've tried so far:
var myul = document.getElementById("ulid");
var myli = myul.getElementsByTagName("li");
for(var i = 0; i < myli.length; i++) {
//myli[i].parentNode.style.display = "none"; // that works
var links = myli[i].getElementsByTagName("a");
for(var ii = 0; ii < links.length; ii++) {
links[ii].parentNode.style.display = "none"; // doesnt work
}
}
I can hide the li items but cant do the same for a So i cant reach the div. What am i doing wrong here?
EDIT: getElementsByClassName seems not working in greasemonkey scripts as it simply works in Emmanuel N's fiddle.
Your code seems to work. Check out this Fiddle
var myul = document.getElementById("ulid");
var myli = myul.getElementsByTagName("li");
for(var i = 0; i < myli.length; i++)
{
var links = myli[i].getElementsByTagName("a");
for(var ii = 0; ii < links.length; ii++)
{
links[ii].parentNode.style.display = "none";
}
}
Your code actually does work, but I don't think it does what you're intending it to do. The last line: links[ii].parentNode.style.display = "none" will actually hide the parent node of the a tag (i.e. the li) tag, rather than the div. parentNode will go one level UP, not down.
Instead of trying to get myli[i].getElementsByTagName("a") and then working down to the div, why not myli[i].getElementsByTagName("div"), and then simply do:
var myul = document.getElementById("ulid");
var myli = myul.getElementsByTagName("li");
for(var i = 0; i < myli.length; i++) {
//myli[i].parentNode.style.display = "none"; // that works
var links = myli[i].getElementsByTagName("div");
for(var ii = 0; ii < links.length; ii++) {
links[ii].style.display = "none";
}
}
Of course, there are many more efficient ways to do it. You already have classnames on the divs, so
document.getElementsByClassName("mydiv");
would work just as well.
Or, if you use jQuery, you can do the same thing without having to iterate explicitly:
$("div.mydiv").css(etc.); // style this however you want
If you aren't opposed to using jQuery, the following would hide your divs for you.
$(document).ready(function () {
var myDivs = $('div.mydiv');
for(var eachDiv in myDivs) {
$(eachDiv).hide();
}
});
im trying to find all images on page with a specifc url /images/icons/bollWhiteDown.gif
and delete or change them can it be done?
and how?
thank you
To remove the IMG tags you can do something like this:
var imgs = document.getElementsByTagName("img");
for (var i = 0; i < imgs.length; i++) {
if (imgs[i].getAttribute("src") == "/images/icons/bollWhiteDown.gif") {
imgs[i].parentNode.removeChild(imgs[i]);
}
}
Based on OP's comment:
<script type="text/javascript">
window.onload = function() {
var imgs = document.getElementsByTagName("IMG");
for (var i = 0; i < imgs.length; i++) {;
if (imgs[i].getAttribute("src") == "/images/icons/bollWhiteDown.gif") {
imgs[i].parentNode.removeChild(imgs[i]);
}
}
}
</script>
try this
var images = document.getElementsByTagName('img');
for (var img in images){
if(images[img].src == '/images/icons/bollWhiteDown.gif'){
images[img].parentNode.removeChild(images[img])
}
}
You can do something like this:
var imgs = document.getElementesByTagName("img");
for (var i = 0; i < imgs.length; i++) {
if (imgs[i].src == "/images/icons/bollWhiteDown.gif") {
imgs[i].src = "somethingelse";
}
}