We Keep Coding

Filter html elements based on data attribute

I have the following html structure
<div id="container">
<div id="child_1" data-customId="100">
</div>
<div id="child_2" data-customId="100">
</div>
<div id="child_3" data-customId="100">
</div>
<div id="child_4" data-customId="20">
</div>
<div id="child_5" data-customId="323">
</div>
<div id="child_6" data-customId="14">
</div>
</div>
And what I want to do is to get the count of child divs that contains different data attribute. For example, I'm trying this:
$(`div[id*="child_"]`).length); // => 6
But that code is returning 6 and what I want to retrieve is 4, based on the different data-customId. So my question is, how can I add a filter/map to that selector that I already have but taking into consideration that is a data-attribute.
I was trying to do something like this:
var divs = $(`div[id*="child_"]`);
var count = divs.map(div => div.data-customId).length;

After you getting the child-divs map their customid and just get the length of unique values:
let divs = document.querySelectorAll(`div[id*="child_"]`);
let idCustoms = [...divs].map(div=>div.dataset.customid);
//idCustoms: ["100", "100", "100", "20", "323", "14"]
//get unique values with Set
console.log([... new Set(idCustoms)].length);//4
//or with filter
console.log(idCustoms.filter((item, i, ar) => ar.indexOf(item) === i).length);//4
<div id="container">
<div id="child_1" data-customId="100">
</div>
<div id="child_2" data-customId="100">
</div>
<div id="child_3" data-customId="100">
</div>
<div id="child_4" data-customId="20">
</div>
<div id="child_5" data-customId="323">
</div>
<div id="child_6" data-customId="14">
</div>
</div>
Note: $ is equivalent to document.querySelectorAll in js returns a NodeList that's why I destructure it by the three dots ...

You'll have to extract the attribute value from each, then count up the number of uniques.
const { size } = new Set(
$('[data-customId]').map((_, elm) => elm.dataset.customid)
);
console.log(size);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="container">
<div id="child_1" data-customId="100">
</div>
<div id="child_2" data-customId="100">
</div>
<div id="child_3" data-customId="100">
</div>
<div id="child_4" data-customId="20">
</div>
<div id="child_5" data-customId="323">
</div>
<div id="child_6" data-customId="14">
</div>
</div>
No need for jQuery for something this trivial, though.
const { size } = new Set(
[...document.querySelectorAll('[data-customId]')].map(elm => elm.dataset.customid)
);
console.log(size);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="container">
<div id="child_1" data-customId="100">
</div>
<div id="child_2" data-customId="100">
</div>
<div id="child_3" data-customId="100">
</div>
<div id="child_4" data-customId="20">
</div>
<div id="child_5" data-customId="323">
</div>
<div id="child_6" data-customId="14">
</div>
</div>
Note that the property customid is lower-cased in the JavaScript. This could be an easy point of confusion. You might consider changing your HTML from
data-customId="14"
to
data-custom-id="14"
so that you can use customId in the JS (to follow the common conventions).

Fire JS code for every element with the same class

I have a cart page with multiple products that have a new price. I now want to show the customer, using JS, how much he can save. For that I use my very basic knowledge of JS to write the old and new price into a variable, replace stuff I don't want in there like "€" and do my math. Then I create a new div with a certain text and how much the customer can save. What I want to achieve is that he writes that under every product.
As you can see from the snippet he only does that for the first product. I need some kind of loop or anything where he does that code for every product in the cart. So far I searched for 2 hours and couldn't find a hint. Maybe you guys and girls can help me.
var neuerpreis = document.querySelector(".price.price--reduced").childNodes[2].nodeValue.replace(/,/g, '.').replace(/ /g, '');
var alterpreis = document.querySelector(".price.price--reduced .price__old").childNodes[2].nodeValue.replace(/,/g, '.').replace(/ /g, '');
var difference = (alterpreis - neuerpreis).toFixed(2);
var newDiv = document.createElement("div");
var newContent = document.createTextNode(("You save ") + difference + (" €"));
newDiv.appendChild(newContent);
document.querySelector(".cart-item__price").appendChild(newDiv);
<div class="cart-item ">
<div class="cart-item__row">
<div class="cart-item__image">
<div class="cart-item__details">
<div class="cart-item__details-inner">
<div class="cart-item__price">
<div class="price price--reduced">
<span class="price__currency">€</span> 66,95<span class="price__old">
<span class="price__currency">€</span> 79,00</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="cart-item ">
<div class="cart-item__row">
<div class="cart-item__image">
<div class="cart-item__details">
<div class="cart-item__details-inner">
<div class="cart-item__price">
<div class="price price--reduced">
<span class="price__currency">€</span> 100,95<span class="price__old">
<span class="price__currency">€</span> 79,00</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

You can use querySelecetorAll and relative addressing
I select the .cart-item__price as the relevant container
Then I set some content as default
Note I do not convert to the string (toFixed) until I want to present it.
The INTL number formatter could also be used here
[...document.querySelectorAll(".cart-item__price")].forEach(div => {
const neuerpreis = div.querySelector(".price--reduced").childNodes[2].nodeValue.replace(/,/g, '.').replace(/ /g, '');
const alterpreis = div.querySelector(".price__old").childNodes[2].nodeValue.replace(/,/g, '.').replace(/ /g, '');
const difference = alterpreis - neuerpreis;
let newContent = document.createTextNode("No savings on this product")
const newDiv = document.createElement("div");
if (difference > 0) {
newContent = document.createTextNode(("You save ") + difference.toFixed(2) + (" €"));
}
newDiv.appendChild(newContent);
div.appendChild(newDiv);
})
<div class="cart-item ">
<div class="cart-item__row">
<div class="cart-item__image">
<div class="cart-item__details">
<div class="cart-item__details-inner">
<div class="cart-item__price">
<div class="price price--reduced">
<span class="price__currency">€</span> 66,95
<span class="price__old">
<span class="price__currency">€</span> 79,00
</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="cart-item ">
<div class="cart-item__row">
<div class="cart-item__image">
<div class="cart-item__details">
<div class="cart-item__details-inner">
<div class="cart-item__price">
<div class="price price--reduced">
<span class="price__currency">€</span> 100,95<span class="price__old">
<span class="price__currency">€</span> 79,00</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

var el = document.querySelectorAll(".test_class");
for (i = 0; i < el.length; i++) {
el[i].innerHTML = "test"+i
}
<div class="test_class">hey</div>
<div class="test_class">hey</div>
<div class="test_class">hey</div>
<div class="test_class">hey</div>
Here you go

get data from html page using javascript

I have some HTML - pretty nasty, but not mine and so I don't have control over it. I need to extract some data from the form, the First name value (ABDIGANI) and the Surname value (AHMED). What is the best way to do this with javascript?
<div class="voffset3"></div>
<div class="container well panel panel-default">
<div class="panel-body">
<div class="row">
<div class="col-md-3">
<span class="ax_paragraph">
First name
</span>
<div class="form-group">
<div class="ax_h5">
ABDIGANI
</div>
</div>
</div>
<div class="col-md-3">
<span class="ax_paragraph">
Surname
</span>
<div class="form-group">
<div class="ax_h5">
AHMED
</div>
</div>
</div>
</div>
</div>
</div>
</div>

You could consider HTML in most cases well structured. Try this the following snippet.
Edit: did a change due to the first comment.
Edit: if you have more than one rows, you should use
document.querySelectorAll('.container > .panel-body > .row');
and fetch the pairs for each found element as below.
const markers = ['First name', 'Surname'];
const mRx = [new RegExp(markers[0]), new RegExp(markers[1])];
function findMarker(element) {
for(let i = 0; i < mRx.length; i++) {
if(element.innerHTML.match(mRx[i])) {
return markers[i];
}
}
return null;
}
function findValue(el) {
return el.parentElement.querySelector('.form-group > div').innerHTML.trim();
}
const pairs = [... document.querySelectorAll('.ax_paragraph')]
.map(el => {
return {el: el, mk: findMarker(el)};
})
.filter(n => n.mk !== null)
.map(o => {
return {key: o.mk, value: findValue(o.el)};
});
console.log(pairs);

var x = document.querySelectorAll(".panel-body > div >.col-md-3 > div > div");
x.forEach(myFunction);
function myFunction(item, index) {
//console.log(item.innerHTML.trim());
if (index===0){
console.log("First name : "+item.innerHTML.trim());
}
if (index===1){
console.log("Surname : "+item.innerHTML.trim());
}
}
<div class="voffset3"></div>
<div class="container well panel panel-default">
<div class="panel-body">
<div class="row">
<div class="col-md-3">
<span class="ax_paragraph">
First name
</span>
<div class="form-group">
<div class="ax_h5">
ABDIGANI
</div>
</div>
</div>
<div class="col-md-3">
<span class="ax_paragraph">
Surname
</span>
<div class="form-group">
<div class="ax_h5">
AHMED
</div>
</div>
</div>
</div>
</div>
</div>
</div>

Check this
const firstName = document.querySelector('.row .form-group div').textContent.trim();
const surname = document.querySelector('.row > div:last-child .form-group div').textContent.trim();
note: Its better to change html according to functionality needs, like if you need firstname then you must keep an id attribute to div which is having first name, same goes to surname. then select those fields using id selector, because even if you change html page structure in future, functionality will not get effected.
Check below for reference on how the html should actually be(just to make sure you know it, but the solution you are seeking is above in first two lines)
eg:
<div class="voffset3"></div>
<div class="container well panel panel-default">
<div class="panel-body">
<div class="row">
<div class="col-md-3">
<span class="ax_paragraph">
First name
</span>
<div class="form-group">
<div class="ax_h5" id="firstNameField">
ABDIGANI
</div>
</div>
</div>
<div class="col-md-3">
<span class="ax_paragraph">
Surname
</span>
<div class="form-group">
<div class="ax_h5" id="surnameField">
AHMED
</div>
</div>
</div>
</div>
</div>
</div>
</div>

document.querySelector('.form-group > div').textContent but without modifying the html there is no way to distinguish first name and surname.

If you can't edit the HTML, you can use the XPATH for Example.

angularJS Custom directive functionality works using ng-click but not using ng-mouseOver

Requirement goes like this :- I have left navigation panel which has to be in sync with the items added in the main active view by the user and has to display in tree structure. Basic idea is to provide context aware sub-view that change based on active view.
Custom directive used to display tree structure: https://github.com/nickperkinslondon/angular-bootstrap-nav-tree/blob/master/src/abn_tree_directive.js
my HTML code: (using ng-click)
<div class="add-data-request-panel" style="min-height:1071px;"
ng-click="expandPanel()">
<ul>
<li class="icon-drd icon-drd-diactive" ng-if="panelCollapse" ></li>
<li class="icon-pie-chart icon-pie-active" ng-if="panelCollapse"></li>
<li class="icon-publish-req" ng-if="panelCollapse"></li>
<li class="icon-view-changes" ng-if="panelCollapse"></li>
</ul>
</div>
<div class="data-slider-panel" style="min-height:1071px;display" ng-if="panelExpand">
<div class="data-slider-row mtop" ng-click="collapsePanel()">
<div class="slider-row-left">
<span class="first-char" >S</span>
<span class="second-char">ection</span>
</div>
<div class="slider-row-right">
<div class="icon-drd icon-drd-diactive">
</div>
</div>
</div>
<div class="data-slider-row">
<div class="slider-row-left">
Section2
<div class="sub-slider-row-left">
<abn-tree tree-data="mainArrayObj"></abn-tree> // passing data to tree directive
</div>
</div>
<div class="slider-row-right">
<div class="icon-pie-chart icon-pie-active">
</div>
</div>
</div>
<div class="data-slider-row" ng-click="collapsePanel()">
<div class="slider-row-left">
Section3
</div>
<div class="slider-row-right">
<div class="icon-publish-req">
</div>
</div>
</div>
<div class="data-slider-row" ng-click="collapsePanel()">
<div class="slider-row-left">
Section4
</div>
<div class="slider-row-right">
<div class="icon-view-changes">
</div>
</div>
</div>
</div>
JS implementation in my controller
$scope.panelExpand = false; //setting default flag
$scope.panelCollapse = true; //setting default flag
$scope.expandPanel = function() {
$scope.panelExpand = true;
$scope.panelCollapse = false;
$scope.mainArrayObj = []; // array that holds the data passed in html to custom directive
initialJsonSeparator($scope.model.Data); // method used for iteration
};
$scope.collapsePanel = function() {
$scope.panelExpand = false;
$scope.panelCollapse = true;
};
my HTML code: (using ng-mouseover which is not working and displaying the data passed to navigation bar)
<div class="add-data-request-panel" style="min-height:1071px;" ng-mouseover="hoverIn()"
ng-mouseleave="hoverOut()">
<ul>
<li class="icon-drd icon-drd-diactive"></li>
<li class="icon-pie-chart icon-pie-active"></li>
<li class="icon-publish-req"></li>
<li class="icon-view-changes"></li>
</ul>
</div>
<div class="data-slider-panel" style="min-height:1071px;display"
ng-mouseover="hoverIn()" ng-mouseleave="hoverOut()" ng-show="hoverEdit">
<div class="data-slider-row mtop">
<div class="slider-row-left">
<span class="first-char">S</span>
<span class="second-char">ection1</span>
</div>
<div class="slider-row-right">
<div class="icon-drd icon-drd-diactive">
</div>
</div>
</div>
<div class="data-slider-row">
<div class="slider-row-left">
Section2
<div class="sub-slider-row-left">
<abn-tree tree-data="mainArrayObj"></abn-tree> // array that holds the data passed in html to custom directive
</div>
</div>
<div class="slider-row-right">
<div class="icon-pie-chart icon-pie-active">
</div>
</div>
</div>
<div class="data-slider-row">
<div class="slider-row-left">
Section3
</div>
<div class="slider-row-right">
<div class="icon-publish-req">
</div>
</div>
</div>
<div class="data-slider-row">
<div class="slider-row-left">
Section4
</div>
<div class="slider-row-right">
<div class="icon-view-changes">
</div>
</div>
</div>
</div>
js Implementation for the ng-mouseOver: (while debugging all the iteration and methods executed as expected)
$scope.hoverIn = function() {
this.hoverEdit = true;
$scope.mainArrayObj = []; // array that holds the data passed in html to custom directive
initialJsonSeparator($scope.model.Data); //method used to iterate the data
};
$scope.hoverOut = function() {
this.hoverEdit = false;
};
Any solution to this issue would be of gr8 help. If there is any other better approach other than the ng-mouseOver and ng-mouseLeave to implement hover, please do let me know.

Search data on click event of button using smart table

I am very new to the smart table. I have gone through its documentation on Smart Table.
But the I haven't found how to bind data on click event in smart table?
Code is very big but I am trying to post it here.
<div class="table-scroll-x" st-table="backlinksData" st-safe-src="backlinks" st-set-filter="myStrictFilter">
<div class="crawlhealthshowcontent">
<div class="crawlhealthshowcontent-right">
<input type="text" class="crserachinput" placeholder="My URL" st-search="{{TargetUrl}}" />
<a class="bluebtn">Search</a>
</div>
<div class="clearfix"></div>
</div>
<br />
<div class="table-header clearfix">
<div class="row">
<div class="col-sm-6_5">
<div st-sort="SourceUrl" st-skip-natural="true">
Page URL
</div>
</div>
<div class="col-sm-2">
<div st-sort="SourceAnchor" st-skip-natural="true">
Anchor Text
</div>
</div>
<div class="col-sm-1">
<div st-sort="ExternalLinksCount" st-skip-natural="true">
External<br />Links
</div>
</div>
<div class="col-sm-1">
<div st-sort="InternalLinksCount" st-skip-natural="true">
Internal<br />Links
</div>
</div>
<div class="col-sm-1">
<div st-sort="IsFollow" st-skip-natural="true">
Type
</div>
</div>
</div>
</div>
<div class="table-body clearfix">
<div class="row" ng-repeat="backlink in backlinksData" ng-if="backlinks.length > 0">
<div class="col-sm-6_5">
<div class="pos-rel">
<span class="display-inline wrapWord" tool-tip="{{ backlink.SourceUrl }}"><b>Backlink source:</b> <a target="_blank" href="{{backlink.SourceUrl}}">{{ backlink.SourceUrl }}</a></span><br />
<span class="display-inline wrapWord" tool-tip="{{ backlink.SourceTitle }}"><b>Link description:</b> {{ backlink.SourceTitle }}</span> <br />
<span class="display-inline wrapWord" tool-tip="{{ backlink.TargetUrl }}"><b>My URL:</b> <a target="_blank" href="{{backlink.TargetUrl}}">{{ backlink.TargetUrl }}</a></span><br />
</div>
</div>
<div class="col-sm-2">
<div class="pos-rel">
{{ backlink.SourceAnchor }}
</div>
</div>
<div class="col-sm-1">
<div>
{{ backlink.ExternalLinksCount }}
</div>
</div>
<div class="col-sm-1">
<div>
{{ backlink.InternalLinksCount }}
</div>
</div>
<div class="col-sm-1">
<div ng-if="!backlink.IsFollow">
No Follow
</div>
</div>
</div>
<div class="row" ng-if="backlinks.length == 0">
No backlinks exists for selected location.
</div>
</div>
<div class="pos-rel" st-pagination="" st-displayed-pages="10" st-template="Home/PaginationCustom"></div>
</div>
and my js code is here.
module.controller('backlinksController', [
'$scope','$filter', 'mcatSharedDataService', 'globalVariables', 'backlinksService',
function ($scope,$filter, mcatSharedDataService, globalVariables, backlinksService) {
$scope.dataExistsValues = globalVariables.dataExistsValues;
var initialize = function () {
$scope.backlinks = undefined;
$scope.sortOrderAsc = true;
$scope.sortColumnIndex = 0;
};
initialize();
$scope.itemsByPage = 5;
var updateTableStartPage = function () {
// clear table before loading
$scope.backlinks = [];
// end clear table before loading
updateTableData();
};
var updateTableData = function () {
var property = mcatSharedDataService.PropertyDetails();
if (property == undefined || property.Primary == null || property.Primary == undefined || property.Primary.PropertyId <= 0) {
return;
}
var params = {
PropertyId: property.Primary.PropertyId
};
var backLinksDataPromise = backlinksService.getBackLinksData($scope, params);
$scope.Loading = backLinksDataPromise;
};
mcatSharedDataService.subscribeCustomerLocationsChanged($scope, updateTableStartPage);
}
]);
module.filter('myStrictFilter', function ($filter) {
return function (input, predicate) {
return $filter('filter')(input, predicate, true);
}
});
But It is working fine with the direct search on textbox.
but according to the requirement I have to perform it on button click.
Your suggestions and help would be appreciated.
Thanks in advance.

You can search for a specific row by making some simple tweaks.
add a filter to the ng-repeat, and filter it by a model that you will insert on the button click, like so: <tr ng-repeat="row in rowCollection | filter: searchQuery">
in your view, add that model (using ng-model) to an input tag and define it in your controller
then pass the value to the filter when you click the search button
here's a plunk that demonstrates this
you can use filter:searchQuery:true for strict search
EDIT:
OK, so OP's big problem was that the filtered values wouldn't show properly when paginated, the filter query is taken from an input box rather then using the de-facto st-search plug-in, So I referred to an already existing issue in github (similar), I've pulled out this plunk and modified it slightly to fit the questioned use case.