This is the html code
<div class="extra-sub-block sub-block-experience">
<h6 style="display:inline;" id="exp-pos-0" class="extra-sub-block-head sub-block-head-experience">CEO</h6>
</div>
<div class="extra-sub-block sub-block-experience">
<h6 style="display:inline;" id="exp-pos-1" class="extra-sub-block-head sub-block-head-experience">COO</h6>
</div>
There are several such similar structures. Now I try to extract the values from each block.
var temp=document.getElementsByClassName('sub-block-experience');
var result=$(temp[0]+"#exp-pos-0");
This throws an error. I followed selecting element inside another DOM
I also tried
var temp=document.getElementsByClassName('sub-block-experience');
var result=temp[0].find('h6');
This doesn't work as well. What am I doing wrong here. Help?
For extracting the values from all blocks, you can use .map() function as follows:
var results = $('.extra-sub-block-head').map(function(){
return $(this).text();
})
Demo
side note: Since id is unique in a document, you can directly access the element using id selector like var result= $("#exp-pos-0");instead of var result=$(temp[0]+"#exp-pos-0");
Try, var result=$(temp[0]).find('h6');
Even, in the documentation link that you gave in question, it shows that you should wrap your result from document.getElementById in $() to be applied with jQuery. What it does is, that it converts the native javascript object into a jquery object.
Demo
function testIt(){
var tags, index;
tags = document.getElementsByTagName('h6');
for (index = 0; index < inputs.length; ++index) {
//do something ...
}
}
If I am correct you are trying to get ceo and coo?.If that's the case then with jquery:
var x= $('.extra-sub-block h6');
//values are
$(x[O]).html();
$(x[1]).html();
You could also use plain javascript:
var result = document.querySelectorAll('.sub-block-experience h6');
Or if you like it separate:
var temp = document.querySelectorAll('.sub-block-experience');
var result = [];
for(var i = 0, elem; elem = temp[i]; i++) {
result = result.concat(elem.querySelectorAll('h6'));
}
But be aware of the browser compatability of querySelectorAll and querySelector.
Related
The objective is to create multiple sliders on the page by linking the slider to something. The slider must be activated by clicking or hovering the slider anchor. sliderList would be a array for making this process easier so i wouldn't have to link each other manually on the configs js file.
I need to get the attribute value from a element that is inside an array. In this case, holder is the array from where I want to extract the attribute value from the current array element. I tried doing this:
var holder = $('[slider-select]');
for (var i = 0; i < holder.length; i++) {
var sliderList = $('[slider-target='
+holder[i].attr('slider-select')
+']');
}
It looks like +holder[i].attr('slider-select') isn't working. I'm learning JavaScript/Jquery and it's crazy how things goes wrong even when it makes all sense, lol. Let me know if I wasn't clear enough.
The function attr is a built-in function from jQuery, it's a shorthand of function getAttribute and setAttribute.
In your case you want to do this:
var holder = $('[slider-select]');
for (var i = 0; i < holder.length; i++) {
var test = holder[i];
var sliderList = $('[slider-target=' + holder[i].getAttribute('slider-select') + ']');
} ^
A good approach is to use the jQuery built-in functions, so you can use this:
$('[slider-select]').each(function() {
var sliderList = $('[slider-target=' + $(this).attr('slider-select') + ']');
}); ^
Resources
.attr()
getAttribute
setAttribute
.each()
holder[i] contains a plain DOM element, but you're trying to use the jQuery attr method on it. You need to convert it into a jQuery object $(holder[i]) (or else use the native getAttribute on the DOM element):
var holder = $('[slider-select]');
for (var i = 0; i < holder.length; i++) {
// Splitting this up a bit just to make it more readable:
var val = $(holder[i]).attr('slider-select'); // instead of holder[i].attr(...)
var sliderList = $('[slider-target="' + val + '"]');
// confirm we got the element:
console.log(sliderList.text());
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div slider-select="A">A</div>
<div slider-select="B">B</div>
<div slider-select="C">C</div>
<div slider-target="A">a</div>
<div slider-target="B">b</div>
<div slider-target="C">c</div>
The attr method is not a function on the JS element object. You'll want to wrap it in jquery to retrieve attribute values instead. For instance
$(holder[i]).attr("slider-select")
Lets say I have
ThisTextChanges
ThisTextChanges
ThisTextChanges
ThisTextChanges
I want to iterate through these and get the "ThisTextChanges" which are some numbers that changes, most accurately timers.
How can i achieve that? jquery is fine.
They are inside a div with id "main_container".
I need to put the text in a var so the href is importanto to know which var i use for each one.
Lets break the task down into several steps:
Get a handle to all of our links (document.querySelectorAll)
learn how to get the current text of an a tag (childNode[0].nodeValue)
put it all together (Array.from, Array.map)
Get a handle to all of our links:
we will use document.querySelectorAll to get list of all nodes that match our selector. here I'm just going to use the selector a, but you probably have a class that specifies these links vs other links on the page:
var links = document.querySelectorAll('a');
Get the text of a link
This one is a bit more complicated. There are several ways to do this, but one of the more efficient ways is to loop through the child nodes (which will mostly be text nodes), and append the node.nodeValue for each one. We could probably get away with just using the nodeValue of the first child, but instead we'll build a function to loop through and append each.
function getText(link){
var text = "";
for (var i = 0; i < link.childNodes.length; i++){
var n = link.childNodes[i];
if (n && n.nodeValue){
text += n.nodeValue;
}
}
return text;
}
Put it all together
To put it all together we will use Array.map to turn each link in our list into the text inside it. This will leave us with an array of strings. However in order to be able to pass it to Array.map we will have to have an array, and document.querySelectorAll returns a NodeList instead. So to convert it over we will use Array.from to turn our NodeList into an array.
function getText(link){
var text = "";
for (var i = 0; i < link.childNodes.length; i++){
var n = link.childNodes[i];
if (n && n.nodeValue){
text += n.nodeValue;
}
}
return text;
}
var linkTexts = Array.from(document.querySelectorAll('a'))
.map(getText);
console.log(linkTexts);
this is text
this is some more text
You can just add condition in the a selector as follows:
var array = [];
$('#main_container a[href="/example2"]').each(function(){
array.push($(this).html());
});
console.log(array);
You can iterate and store them in an Array
var arr = [];
$("a").each(function(){
arr.push($(this).text());
console.log( arr );
});
you can achieve that in may ways. this example using for loop.
var main_container = document.getElementById("main_container");
var items = main_container.getElementsByTagName("a");
for (var i = 0; i < items.length; ++i) {
// do something.....
}
var array = [];
$('#main_container a').each(function(){
array.push($(this).html());
});
console.log(array);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="main_container">
ThisTextChanges 1
ThisTextChanges 2
ThisTextChanges 3
ThisTextChanges 4
</div>
Please try:
$('#main_container > a[href]').each(function() {
var tes = $(this).attr('href').substring(1);
window[tes] = $(this).text();
});
123 will produce var named example1 with value 123, and so on.
I am trying to pull 2 pieces of data from each of several fields. All the fields have been given the same "name" so as to allow them to be referenced easily.
<input type="text" name="common_name" data-X='ABC'>
The first piece of data I am pulling is their values, which does seem to be working. My issue is when I try to use attr(). It just stops dead in the water at that point.
var length = $('[name=common_name]').size();
for(var i=0; i < length; i++){
var value = parseInt($('[name=common_name]').get(i).value); //doesn't kill the script
var dataX = $('[name=common_name]').get(i).attr('data-X'); //Script is killed here
}
Since I'm not having issues with using attr() in general when the selector is selecting the element based on an id, I would think the issue has to do with the fact that in this case multiple elements are being returned by jQuery. What I am confused by is that I thought that get(#) is supposed to grab a specific one…in which case I don't see what the problem would be. (After all, using get(#) DOES work when I use val()).
So…why doesn't attr() work here?
.get() returns a dom element reference which does not have the .attr() method, so you can use the .eq() method which will return a jQuery object
var length = $('[name=common_name]').size();
for (var i = 0; i < length; i++) {
var value = parseInt($('[name=common_name]').eq(i).val()); //doesn't kill the script
var dataX = $('[name=common_name]').eq(i).attr('data-X'); //Script is killed here
}
The correct way to iterate over an jQuery object collection is to use the .each() method where the callback will be invoked for each element in the jQuery collection
$('[name=common_name]').each(function () {
var $this = $(this);
var value = parseInt($this.val()); //or this.value
var dataX = $this.attr('data-X'); //or $this.data('X')
})
Suppose the html is like this
<input type="text" name="common_name" data-X='ABC'>
<input type="text" name="common_name" data-X='DEF'>
<input type="text" name="common_name" data-X='GHI'>
Now the script part
$('input[name="common_name"]').each(function() {
var el = $(this);
text_val = el.val();
data = el.attr('data-X');
console.log(text_val);
console.log(data);
});
attr is a jquery fn, should call by jquery object
use like this
$('[name=common_name]').attr('data-X')
so try
dataX = $($('[name=common_name]').get(i)).attr('data-X');
I know this can be very basic but I'm very poor in using JavaScript.
Following is my HTML Code :
<div class="request">
<h4>Request a Free Consultation</h4>
<p>XXX-XXX-XXXX</p>
</div>
Using JavaScript, I want to get text contained in <p> element.
I am trying in the following way, but it's giving me undefined error.
var x = document.getElementsByClassName("request");
var pText = x.getElementsByTagName("P").innerHTML;
alert(pText);
Can anyone lead me in the right direction?
EDIT : Here is the fiddle link to try above code :
http://jsfiddle.net/Scoobler/ua9zN/
getElementsByClassName and getElementsByTagName return arrays. So you need to add indexes as well:
var x = document.getElementsByClassName("request");
var pText = x[0].getElementsByTagName("P")[0].innerHTML;
^ ^
alert(pText);
You can simply use querySelectorAll.
var pText = document.querySelectorAll('.request p')[0];
var x = document.getElementsByClassName("request");
The above line returns NodeList. It's like an Array, whose elements can be retrieved using the index. getElementsByTagName too returns the same.
for(var i = 0; i < x.length; i++)
alert(x[i].getElementByTagsName('p')[0].innerHTML); // [0] to get <p>
I have the following JavaScript line:
<div id="box" name="1" margin="4px" padding="4px" onclick="memory(1)"></div>
With the associated memory() function being:
function memory(a) {
var tmpDar = a-1;
var m = document.getElementsByName(tmpDar);
m.innerHTML = arrA[tmpDar];
}
However, when I try executing the code, the HTML doesn't alter... Can somebody please help me?
document.getElementsByName() returns a NodeList and not a single element!
So in order to set the innerHTML of your div, you have to reference an entry inside that array, e.g., like this:
function memory(a) {
var tmpDar = a-1;
var m = document.getElementsByName(tmpDar);
m[0].innerHTML = arrA[tmpDar];
}
In your code you set the innerHTML property for the NodeList object, which has no (visual) effect in the document.
In general it would be better to use id instead of name. Then you could use document.getElementById() in a way like this:
function memory(a) {
var tmpDar = a-1;
var m = document.getElementById(tmpDar);
m.innerHTML = arrA[tmpDar];
}
document.getElementsByName returns an array. So if the element that you want is unique with this name, you should replace your code by :
function memory(a) {
var tmpDar = a-1;
var m = document.getElementsByName(tmpDar);
m[0].innerHTML = arrA[tmpDar]; // Here I have added index 0
}
your trying to find all elements with a name of 0 as far as I can tell. And there is no 0 name.
Also what the other two said, it returns an array you need to call an index on that array.