This question already has answers here:
Checking if jquery is loaded using Javascript
(11 answers)
How to check what version of jQuery is loaded?
(13 answers)
Closed 6 years ago.
What is the best way to check wether jQuery script has been included to the page? I have one, but I don't think it's elegant.
try { $("body") } catch(e) { /* doesn't exist */ }
Like this:
if(window.jQuery)
{
//jquery found
}
Related
This question already has answers here:
Accessing variables indirectly [duplicate]
(4 answers)
Closed 6 years ago.
<script type="text/javascript">
function parent_work_copy(track_number) {
document.form1.track_(track_number)_name.value=document.form1.track_(track_number)_parent_work.value;
}
</script>
If the link below is clicked, I want the line inside of the parent_work_copy function to be modified to:
document.form1.track_5_name.value=document.form1.track_5_parent_work.value
copy to track
How to do this?
Javascript object keys works as string
document.form1["track_"+track_number+"_name"].value=document.form1["track_"+track_number+"_parent_work"].value;
Do something like this :
document.form1['track_'+track_number+'_name'].value
This question already has answers here:
What is the (function() { } )() construct in JavaScript?
(28 answers)
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … })()”?
(10 answers)
Closed 7 years ago.
I have a function:
var waitingDialog = (function($){
.....
return{
}
})(jQuery);
Also could you explain what $ means in the function? Is it going to work without that?
It means that jQuery (if it exists) will be passed to the function. $ is merely the name that variable will take in the scope of the function.
There is a section about that in official jQuery website : https://learn.jquery.com/plugins/basic-plugin-creation/#protecting-the-alias-and-adding-scope
This question already has answers here:
why could a check if (document.addEventListener) returns false
(3 answers)
Closed 8 years ago.
I have been researching how to write a simple function that attaches a listener to a passed in HTML element.
I have been having some confusion with this if statement:
if (elem.addEventListener){
//etc
}
I assume elem.addEventListener returns true if the element has the ability to add a listener? Is this correct? If so, in what cases will this return false?
Internet Explorer doesn't support addEventListener until version 9. This is simply a check to ensure the browser supports it.
This question already has answers here:
How can I detect changes in location hash?
(11 answers)
Closed 9 years ago.
How do I call a javascript function every time the URL has a change with the string after the hash?
for example
.com/onepage/
(onwindowload called)
.com/#1000
(need a function to be called)
.com/#500
(need a function to be called)
Here is a way......
window.location.watch(
'hash',
function(id,oldVal,newVal){
console.log(oldval+" to "+newVal);
//Do something.........
}
);
This question already has answers here:
JavaScript: location.href to open in new window/tab?
(7 answers)
How to add/update an attribute to an HTML element using JavaScript?
(4 answers)
Closed 9 years ago.
So, this is my code:
function link1()
{
window.location.href="Example";
}
How do i achieve the _blank function in JS?
Cheers
(Note: I am not using a library, nor am i intending to atm)
window.open will do the trick.
function link1()
{
window.open("http://www.example.com");
}