Develop Reference

Loop through list of clickable elements and write out the html to respective files

I'm using jQuery to get a list of elements that contain certain key words. I'm able to get the list of elements but I don't know how to loop through each element, click on its child element and download the newly loaded page. Here's the casperjs code I have so far:
var casper = require('casper').create({
clientScripts: ["/var/www/html/project/public/js/jquery-3.3.1.min.js"]
});
var fs = require('fs');
casper.start('https://m.1xbet.co.ke/en/line/Football/', function () {
var links = casper.evaluate(function () {
$.expr[":"].contains = $.expr.createPseudo(function (arg) {
return function (elem) {
return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
return $("#events-betting").find("li.events__item_head:contains(World cup)");
});
var date = new Date(), year = date.getFullYear(), month = date.getMonth() + 1, day = date.getDate();
var folderName = year + '-' + month + '-' + day;
// loop would go here to save each file
var path = "destination/" + folderName + "/1xbet/worldcup-1";
fs.write(path + ".html", this.getHTML(), "w");
});
casper.run();
I'd like to click on the individual items on the links object - they aren't anchor tags but rather they are clickable divs with inline javascript listening for a click.
The goal is to click on the div that has certain text I'm interested in, then once clicked, I can either choose to scrape the HTML and save it in a file or get the current url; either will be fine for my purposes. Since there could be multiple divs with the desired text, I'd like for a way to loop through each and do perform the same operation.
This is an example of the page I'm interested in:
https://m.1xbet.co.ke/en/line/Football/
The parent element in this case is: #events-betting and nested is a list of li tags with clickable divs.

I can either choose to scrape the HTML and save it in a file or get the current url
Of course the solution is very specific to this exact site, but then again it is quite normal when doing web scraping.
casper.start('https://m.1xbet.co.ke/en/line/Football/', function () {
var links = casper.evaluate(function () {
$.expr[":"].contains = $.expr.createPseudo(function (arg) {
return function (elem) {
return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
var links = [];
// Better to scrpape .events__title as it contains data-href attribute
$("#events-betting").find(".events__title:contains(World cup)").each(function (i, item) {
var lastPartOfurl = item.getAttribute("data-href");
lastPartOfurl = lastPartOfurl.split("/");
links.push("https://m.1xbet.co.ke/en/line/Football/" + item.getAttribute("data-champ") + "-" + lastPartOfurl[1]+'/');
})
return links;
});
console.log(links);
});
The result:
https://m.1xbet.co.ke/en/line/Football/1536237-FIFA-World-Cup-2018/,https://m.1xbet.co.ke/en/line/Football/1204917-FIFA-World-Cup-2018-Winner/,https://m.1xbet.co.ke/en/line/Football/1518431-FIFA-World-Cup-2018-Special-bets/,https://m.1xbet.co.ke/en/line/Football/1706515-FIFA-World-Cup-2018-Teams-Statistics-Group-Stage/

jquery API request error/ won't show giphy's

I cannot figure out what is wrong with my code and why my API/AJAX call will not show the images that I'm calling. It appears when I console.log(results) the 10 images are called but they will not show. Here is my jquery code..
//when window loads ... function will happen
window.onload = function(){
var musiciansList = [];
var inputBox = $('#submitButton')
//whatever musician the user submits will appear
$('#submitButton').on('click', function(){
var input=$('#submitButton');
var userInput=inputBox.val();
musiciansList.push(userInput);
renderButtons();
});
function renderButtons() {
var button = $('<button>');
button.text(musiciansList[musiciansList.length-1]);
button.addClass('band')
$('.container').append(button);
};
//When I click this button a function will happen
$(document).on('click', '.band', function() {
//variable queryUrl for giphy
var queryUrl = "http://api.giphy.com/v1/gifs/search?q=music&api_key=dc6zaTOxFJmzC&limit=10";
//requesting information giphy
$.ajax({
url: queryUrl,
method: 'GET'
})//recieving information from giphy
.done(function(response) {
//returns the response from the website
var results = response.data;
var imageUrl = response.data.image_original_url;
var musicians = $('<img>');
console.log(queryUrl)
//takes var musicians and adds attr src and imageUrl
musicians.attr('src', imageUrl);
musicians.attr('alt', 'musician');
$("#images").push(imageUrl)
//prepend puts the images in the beginning
$("#images").prepend(imageUrl);
$('<img>').val();
console.log(results)
console.log(imageUrl)
//empty gifs button
$('#clearButton').click(function(event){
$(musicians).remove()
});
});
});
};

So it looks like you've got a couple of errors.
First one looks like your usage of the giphy API. If you go to http://api.giphy.com/v1/gifs/search?q=music&api_key=dc6zaTOxFJmzC&limit=10 in your browser, you can see how the data is coming back. The data is returned as an array of GIF objects that each have an "images" property that has an assortment of images you can choose from. Instead of accessing the images like
var imageUrl = response.data.image_original_url;
you need to loop through the response.data array and grab an image, as in the following example
var imageUrl = response.data[i].images.fixed_height.url;
Your other issue is when appending the image element you created to the DOM. You are appending the imageUrl variable (which is just the value of the image URL), instead of the img element you created which is stored in the musicians variable (this will also have to be a part of your loop). In addition, the following:
$("#images").push(imageUrl)
//prepend puts the images in the beginning
$("#images").prepend(imageUrl);
$('<img>').val();
can all be refactored to the single line
$("#images").prepend(musicians);
Your end result should look something like:
for(var i = 0; i < response.data.length; i++){
var imageUrl = response.data[i].images.fixed_height.url;
var musicians = $('<img>');
//takes var musicians and adds attr src and imageUrl
musicians.attr('src', imageUrl);
musicians.attr('alt', 'musician');
//prepend puts the images in the beginning
$("#images").prepend(musicians);
}

AJAX returns previous value in array

I'm making a website to host artwork. The idea is that when the page loads I have JavaScript run a php file that makes a query to the server to get the names and IDs of the image files (artwork.jpg) and display them as thumbnails on a page.
When you scroll over the thumbnail, the artwork is displayed larger on a different part of the screen and the description, specs, etc for the piece of art fades in. My issue is that when I make this second AJAX call it appends the value of the previously moused over image to the screen and does nothing until you've moused over at least two images.
Here's my code for the first ajax call that appends thumbnails to the page and creates a form with the value of the thumnbnail's id:
function getArtDescriptions()
{
$.post('../../path/to/script/get_art.php', function(json)
{
if (json.art.length > 0)
{
$.each(json.art,function()
{
var info =
'<div class = "thumbnail_box">'
+ '<img src = "images/thumbnails/'
+ this['img']
+ '"id = "'
+ this['ID']
+ '"> '
+ '<form id = "art_descriptions'
+ this['ID']
+ '" '
+ 'name = "art_descriptions'
+ this['ID']
+ '">'
+ '<input type = "hidden" id = "descriptions" name = "descriptions" value = "'
+ this['ID']
+ '"></form>'
+ '</div>';
});
}
}, 'json');
}
And this is the code I'm using to make the second AJAX call that is giving me a problem:
setTimeout(function get_id()
{
var tooltipTimeout;
$(".thumbnail_box img").on("mouseenter", function()
{
tooltipTimeout = setTimeout(details(this.id),0);
console.log(this.id);
});
$(".thumbnail_box img").on("mouseleave", function()
{
hideTooltip();
});
function hideTooltip()
{
clearTimeout(tooltipTimeout);
$(".description").fadeOut().remove();
}
}, 800);
//GRAB DESCRIPTIONS FROM DATABASE AND
function details(art)
{
var formname = "#art_descriptions"+art;
var filename = '../../file/path/to/script/get_descriptions.php';
//console.log($(formname).serialize());
$(".thumbnail_box img").on("mouseenter", function()
{
$.post(filename, $(formname).serialize(), function(json)
{
if (json.descriptions.length > 0)
{
//MAKE SURE TO EMPTY OUT DIV CLASSES FOR EACH TAB
$(".description").empty();
$.each(json.descriptions,function()
{
console.log("art method"+this['ID']);
$(".description").append(this['description']+this['ID']).hide().fadeIn("fast");
});
}
}, 'json');
});
};
When I console.log(this['ID']) in the get_id() method the correct value is displayed in the console, but when I console.log("art method"+this['ID'] in the details method I get a value equal to the previously scrolled over thumbnail's ID. I'd really appreciate any insight on this issue.
Is it something to do with the use of setTimeout()? My code would not run without specifying a timeout for the method. For example if I load the page and then scroll over images with ID's 14 and then 13, my console will display:
14
13
art method 14

The issue is that you are appending more of the same events. After the first mouseenter event occurs the details function is called, which then appends another mouseenter event. So subsequent calls will be doing the same thing. You can see an example of this here: http://jsfiddle.net/6qre72fk/.
var counter = 0;
$('#container1').on('mouseenter', function(){
$('#container2').text('First mouseenter');
appendingAnotherMouseEnter();
});
function appendingAnotherMouseEnter(){
$('#container1').on('mouseenter', function(){
$('#container2').text(counter);
counter++;
});
}
You can see how the counter is incremented several times due to all appended the mouseenter events.

Do something when all dynamically created images have loaded

What I'm trying to do is create a dynamic wall of images.
What I'm doing is this:
Call an API to get some response. Create an array of objects based on response
Based on the array, make HTML elements for each object where there's an img in it too.
When all of these HTML elements are created, attach it to the DOM, and call a final function.
This is what I have so far (truncated to get the point across):
EDIT: code has changed a bit. scroll to bottom of question for link to current code.
// based on one post, construct the html and return it
function getOneHtml(post, w) {
console.log("getting one html");
var outerDiv = $("<div>", {class: "brick"});
outerDiv.width(w);
var img = $("<img />");
img.attr("src", post.img_src);
img.on('load', function() {
console.log("img loaded");
var ratio = this.width / w;
h = this.height / ratio;
$(this).css({'height': h});
// ...
// ...
// create the element
// an alternative I'm using for now is directly append
// the created HTML onto the page, but that results
// in a kinda messy interface.
return outerDiv[0].outerHTML;
});
}
// queries an api and then calls callback after everything is done
function requestData(subreddit, callback) {
// array of objects with link to image, post title, link to reddit
posts = [];
var w = $(window).innerWidth() / 3,
html = ''; // holds all of the inner HTML for all elements
$.get("url here", function(data) {
var arr = data.data.children;
arr.forEach(function(res_post) {
console.log("looping in requestData");
// prepare a post object
// ...
// ...
html += getOneHtml(post, w); // get the HTML for this post
});
// this should happen after everything else is done
console.log("calling callback");
callback(html);
});
}
// complete the DOM
function makeWall(html) {
console.log("making wall");
// do stuff
}
Now the trace of the program in console is this:
looping in requestData
getting one html
looping in requestData
getting one html
... // bunch of times
calling callback
making wall
(20) img loaded
So now the problem is that the HTML isn't prepared until each image is loaded, and so it doesn't actually get attached to the DOM.
How can I make sure that things happen in order in which I want them to? I tried refactoring code into more of an async style but that didn't work (not my strongest point).
I also tried looking at $.Deferred but I don't understand it, and how to integrate it into my code.
Any help is appreciated.
EDIT:
I think it might help to see what I'm doing: http://karan.github.io/griddit/
When you load, I want the images to load first, and then fade in. Currently, they show up, then hide and then fade in. Here's the source: https://github.com/karan/griddit/blob/gh-pages/js/main.js.
Also, if you scroll down one or two pages, then scroll back up, some images show up behind others.

You can use .done(), as explained in the jQuery API documentation on .done() specifically explains how to use .done() with $.get().
It's as simple as:
$.get( "test.php" ).done(function() {
alert( "$.get succeeded" );
});
Concretely...
As the API documentation link provided above indicates, you can daisy chain .done() calls together.
$.get(url,handler).done(function(){console.log('calling callback')},callback);

Note, Not certain about functionality of included plugins, i.e.g., #grid layout,
css, etc. image width, height and #grid layout not addressed, save for existing pieces re-composed in attempt at flow clarity.
Piece below solely to fulfill // Do something when all dynamically created images have loaded requirement. See console at jsfiddle
Note also, piece at jsfiddle format issue. In order to test piece, drew in 2 plugins from links at original post. Tried jsfiddle's TidyUp feature, which inserted linebreaks.
Piece may need some re-formatting; though current jsfiddle does provide callback functionality, as per original post. Again, see console. Thanks for sharing.
updated
$(function() {
// the name of the last added post
var last_added = '';
// to control the flow of loading during scroll var scrollLoad = true;
var q = 'cats';
var callbacks = $.Callbacks();
// callback,
// Do something when all dynamically created images have loaded
var callback = function (cb) {
return console.log( cb||$.now() )
};
callbacks.add(callback);
function getOneHtml(post, w, count){
var img = $("<img>", {
"src" : post.img_src,
"width" : w
});
img.on('load', function(e) {
var ratio = e.target.width / w;
h = e.target.height / ratio;
$(e.target).css('height',h)
});
var link = $("<a>", {
"href" : post.permalink,
"target" : "_blank",
"html" : img
});
var outerDiv = $("<div>", {
"class" : "brick",
"style" : "width:" + w
});
$.when($(outerDiv).appendTo("#grid"),
$(link),
count)
.then(function(div, _link, _count) {
// `image` `fadeIn`; adjustable
$(_link).appendTo($(div)).hide(0).fadeIn(2000);
return _count
})
.always(function(_count){
callbacks.fireWith(window, [_count + " images appended to grid at " + $.now()])
});
};
function requestData(subreddit,callback) {
//array of objects with link to image, post title,link to reddit
posts=[];
var w = $(window).innerWidth() / 3;
html = '';
$.ajax({
type : 'get',
url : "http://api.reddit.com/r/" + subreddit + "/hot.json?&after=" + last_added,
beforeSend : function () {
$("#searchterm").addClass("loadinggif");
},
complete : function () {
$("#searchterm").removeClass("loadinggif");
},
success : function (data) {
var arr = data.data.children;
var count = null;
arr.forEach(function(res_post) {
if(!res_post.data.is_self&&(/\.(gif|jpg|jpeg|tiff|png)$/i).test(res_post.data.url)) {
// `images` count
++count;
var post = {
'title' : res_post.data.title,
'img_src': res_post.data.url,
'name' : res_post.data.name,
'permalink': 'http://reddit.com' + res_post.data.permalink
};
getOneHtml(post, w, count);
}
last_added = res_post.data.name;
});
scrollLoad = true;
// callback,
// Do something when all dynamically created images have loaded
// see `console`; adjustable
callbacks.fireWith( window, [$(".brick img").size() + " appended to grid, callback at " + $.now()]);
}});
}
// function makeWall() {}
})
jsfiddle http://jsfiddle.net/guest271314/ggsY9/

Im designing a chess game in HTML,i want to change one charecter from on position to another

i have designed chess board using buttons.Initially all the values on the button will be null,upon loading the page all the pieces appear on them and the piece of code is as follows
<input type="button" id="A8" value="" style="background:#FFE4C4;font-size: 70px;height:90;width:100" onclick="check(this.id)">
and in the onLoad function,the ASCII charecter of the chess pieces are assigned as follows:
document.getElementById('A1').value=String.fromCharCode(9814);
Now what i want is to change the one piece from a button to another on clicking two buttons.i had tried a lot with the following script
function check(clicked_id) {
var Button_2 = "";
if (i < 2) {
i++;
// alert("i:"+i);
if (i == 1) {
Button_1 = clicked_id;
B1_val = document.getElementById(Button_1).value;
alert("B1 Button val:" + B1_val);
}
if (i == 2) {
var Button_2 = clicked_id;
B2_val = document.getElementById(Button_2).value;
alert("b1 val:" + B1_val);
alert("B2 val:" + B2_val);
B2_val = B1_val;
B1_val = "";
alert("B1 val:" + B1_val + "B2 val:" + B2_val);
}
} else {
alert("Only 2 butons should press..i:" + i);
i = 0;
}
// alert("clcked a button:"+clicked_id);
}
But the code is not working

If you just want to move the value from the location of the first click to the location of the second click, then you can do that fairly simply like this:
var lastClick;
function check(id) {
var src, dest;
if (!lastClick) {
// no previous click so just store the location of this first click
lastClick = id;
} else {
// move value from lastClick id to new id
src = document.getElementById(lastClick);
dest = document.getElementById(id);
dest.value = src.value;
src.value = "";
lastClick = null;
}
}
I assume that a real application would need all sorts of error handling that doesn't let you put a piece on top of another piece, ignores first clicks on empty spaces, enforces only legal moves, etc...