So let's say I have a WYSIWYG (Tiny MCE in my case) and I take some input.
I want to look at that input and extract any base64 images and then send those somewhere to be converted to URL's in an AWS bucket.
I can do the last bit but I'm stuck with the middle part which is to extract the elements from a variable.
This is what I am trying that does not work ["TypeError: Cannot read property 'getElementsByTagName' of undefined"]
let dombody = document.createElement("div").append(mcebody);
let imglist = dombody.getElementsByTagName("img");
Thanks for any ideas or suggestions in advance. Perhaps this is not possible.
.append has no return value, so dombody is undefined, so an error is thrown when you try to call a method on it.
Assign the dombody in an earlier statement instead (and remember to use const instead of let when possible):
const dombody = document.createElement("div");
dombody.append(mcebody);
const imglist = dombody.getElementsByTagName("img");
I would like to read a query string in JavaScript, and then modify the link that will be rendered in HTML, however I am rendering the HTML as part of liquid loop. So am not sure how I would read the query string in JavaScript, store the value of query string in a variable, and show it in the html that's rendered as part of a liquid loop.
I am still new to Liquid so any help would be appreciated. I am using this as part of Dynamics 365 portals.
If I understand correctly you could just use javascript to make an html element then edit that element as you wish in javascript via
var x = document.getElementById("myVar");
//Use var x to edit this element here
//OR
var x = document.createElement("myVar");
//Use var x to edit this element here
document.getElementByID is only used if your element is already made in html, where document.createElement is used if you'd like to make a new element rather than using one thats already made.
So, I have some code that should do four things:
remove the ".mp4" extension from every title
change my video category
put the same description in all of the videos
put the same keywords in all of the videos
Note: All of this would be done on the YouTube upload page. I'm using Greasemonkey in Mozilla Firefox.
I wrote this, but my question is: how do I change the HTML title in the actual HTML page to the new title (which is a Javascript variable)?
This is my code:
function remove_mp4()
{
var title = document.getElementsByName("title").value;
var new_title = title.replace(title.match(".mp4"), "");
}
function add_description()
{
var description = document.getElementsByName("description").value;
var new_description = "Subscribe."
}
function add_keywords()
{
var keywords = document.getElementsByName("keywords").value;
var new_keywords = prompt("Enter keywords.", "");
}
function change_category()
{
var category = document.getElementsByName("category").value;
var new_category = "<option value="27">Education</option>"
}
remove_mp4();
add_description();
add_keywords();
change_category();
Note: If you see any mistakes in the JavaScript code, please let me know.
Note 2: If you wonder why I stored the current HTML values in variables, that's because I think I will have to use them in order to replace HTML values (I may be wrong).
A lot of things have been covered already, but still i would like to remind you that if you are looking for cross browser compatibility innerHTML won't be enough, as you may need innerText too or textContent to tackle some old versions of IE or even using some other way to modify the content of an element.
As a side note innerHTML is considered from a great majority of people as deprecated though some others still use it. (i'm not here to debate about is it good or not to use it but this is just a little remark for you to checkabout)
Regarding remarks, i would suggest minimizing the number of functions you create by creating some more generic versions for editing or adding purposes, eg you could do the following :
/*
* #param $affectedElements the collection of elements to be changed
* #param $attribute here means the attribute to be added to each of those elements
* #param $attributeValue the value of that attribute
*/
function add($affectedElements, $attribute, $attributeValue){
for(int i=0; i<$affectedElements.length; i++){
($affectedElements[i]).setAttribute($attribute, $attributeValue);
}
}
If you use a global function to do the work for you, not only your coce is gonna be easier to maintain but also you'll avoid fetching for elements in the DOM many many times, which will considerably make your script run faster. For example, in your previous code you fetch the DOM for a set of specific elements before you can add a value to them, in other words everytime your function is executed you'll have to go through the whole DOM to retrieve your elements, while if you just fetch your elements once then store in a var and just pass them to a function that's focusing on adding or changing only, you're clearly avoiding some repetitive tasks to be done.
Concerning the last function i think code is still incomplete, but i would suggest you use the built in methods for manipulating HTMLOption stuff, if i remember well, using plain JavaScript you'll find yourself typing this :
var category = document.getElem.... . options[put-index-here];
//JavaScript also lets you create <option> elements with the Option() constructor
Anyway, my point is that you would better use JavaScript's available methods to do the work instead of relying on innerHTML fpr anything you may need, i know innerHTML is the simplest and fastest way to get your work done, but if i can say it's like if you built a whole HTML page using and tags only instead of using various semantic tags that would help make everything clearer.
As a last point for future use, if you're interested by jQuery, this will give you a different way to manipulate your DOM through CSS selectors in a much more advanced way than plain JavaScript can do.
you can check out this link too :
replacement for innerHTML
I assume that your question is only about the title changing, and not about the rest; also, I assume you mean changing all elements in the document that have "title" as name attribute, and not the document title.
In that case, you could indeed use document.getElementsByName("title").
To handle the name="title" elements, you could do:
titleElems=document.getElementsByName("title");
for(i=0;i<titleElems.length;i++){
titleInner=titleElems[i].innerHTML;
titleElems[i].innerHTML=titleInner.replace(titleInner.match(".mp4"), "");
}
For the name="description" element, use this: (assuming there's only one name="description" element on the page, or you want the first one)
document.getElementsByName("description")[0].value="Subscribe.";
I wasn't really sure about the keywords (I haven't got a YouTube page in front of me right now), so this assumes it's a text field/area just like the description:
document.getElementsByName("keywords")[0].value=prompt("Please enter keywords:","");
Again, based on your question which just sets the .value of the category thingy:
document.getElementsByName("description")[0].value="<option value='27'>Education</option>";
At the last one, though, note that I changed the "27" into '27': you can't put double quotes inside a double-quoted string assuming they're handled just like any other character :)
Did this help a little more? :)
Sry, but your question is not quite clear. What exactly is your HTML title that you are referring to?
If it's an element that you wish to modify, use this :
element.setAttribute('title', 'new-title-here');
If you want to modify the window title (shown in the browser tab), you can do the following :
document.title = "the new title";
You've reading elements from .value property, so you should write back it too:
document.getElementsByName("title").value = new_title
If you are refering to changing text content in an element called title try using innerHTML
var title = document.getElementsByName("title").value;
document.getElementsByName("title").innerHTML = title.replace(title.match(".mp4"), "");
source: https://developer.mozilla.org/en-US/docs/DOM/element.innerHTML
The <title> element is an invisible one, it is only displayed indirectly - in the window or tab title. This means that you want to change whatever is displayed in the window/tab title and not the HTML code itself. You can do this by changing the document.title property:
function remove_mp4()
{
document.title = document.title.replace(title.match(".mp4"), "");
}
I use this code to get value from an input box:
var suggest_type = document.getElementById('ac-type').value;
Now I need to apply my js code on several other pages. I heard that it's not nice to repeat an ID on one website. So, I'm thinking to change to use class like this:
var suggest_type = document.getElementByClass('ac-type').value;
This doesn't get the value. How can I use class to get value?
You should stick with using ID's - they only have to be unique within a page.
If you must use classes, you need to use getElementsByClassName():
var elems = document.getElementsByClassName('ac-type');
var value = elems[0].value;
However this function is not well supported on older browsers, which is another good reason to stick with IDs.
Its absolutely fine to repeat ids across a website just not on a single html document.
ID's should be unique within one html page.
It's actually :
var suggest_type = document.getElementsByClassName('ac-type')[0].value;
But I agree with Jon Taylor, ID's can be the same within a website, as long they are not duplicated on the same page.
try using this:
var elements = document.getElementsByClassName('ac-type'); // this is an array containing all matched elements
Use jquery just by using -
$('.ac-type').val();
you will get value.
is it possible to get the ID assigned to User Control from the control using javascript or jquery.
Thanks
What ASP.NET normally does is prefix your control's ID with a string that it uses to determine where in ASP.NET's control tree your actual control resides.
With that in mind, what I normally do is to use jQuery's 'ends with' selector to get the full ASP.NET-parsed ID at runtime.
Something like:
// get a handle on your original control
var myControl = $('[id$="<myOriginalId>"]');
// and then access it's properties
var myRuntimeId = myControl.eq(0).attr('id');
As you can most probably imagine, that's not going to cut it when you've got UserControls with the same ID used in different places of the form. I just jump in and put in some tweaks here and there (probably with using the .eq() function) to suit my business need.
You could put a class on the usercontrol, and then use something like $(".myUC").attr("id")
This might help you to look at it from a different point of view:
In .Net you can get the generated ID by using myControl.ClientID.
If you put that in a javascript variable - I know it's not neat - you can then easily fetch it.
<!--mypage.aspx-->
<script>
var myIdVar = "<%=myControl.ClientID%>";
if(myIdVar == "foo")
{
alert("bar");
}
</script>