How to scroll a down a website and take screenshot using protractor.I have attached the code I have tried..I, able to take screenshot but not able to take full page.
function writeScreenShot(data: string, filename: string) {
var stream = fs.createWriteStream(filename);
stream.write(new Buffer(data, 'base64'));
stream.end();
}
// var foo = element(by.id('foo'));
//of element
//foo.takeScreenshot().then((png) => {
//writeScreenShot(png, 'foo.png');
//});
browser.executeScript('window.scrollTo(0,document.body.scrollHeight)');
//of entire page in viewport
browser.takeScreenshot().then((png) => {
writeScreenShot(png, 'foo.png');
});
Related
Preface:
I am aware that there is a duplicate question out there. I am posting it again because it has no answers (and it's from 4 years ago).
General description of what I want:
I want to be able to hide a DOM-element (adding Element.style.display = "none") before the DOM is loaded into the view.
What I've tried:
Other posts point to using a MutationObserver and running it on the document element.
To ensure that we are able to hide an element before the DOM is loaded, we are to run the script containing the MutationObserver as a content_script with "run_at":"document_start".
I did all of this, and I still see a flicker (the elements appear when I load a page and then quickly disappear).
What I'm trying to do:
There's a ul which contains some li with some text on the page I inject my content_script.js into. I populate my popup.html with <text, checkbox> pairs. If the checkbox is checked, the li containing said text is visible, else it is hidden. I want it to persist between refreshes, hence the use of storage.
Things work - but there's a flicker whenever I refresh the page. The elements are there, then they're gone. I don't want them to show up in the first place!
My code:
When I detect that the DOM elements I may remove have loaded, I generate an Object that indicates whether I should hide or keep visible that specific DOM element.
I then set its Element.style.display to none or block accordingly.
/**manifest.json
...
"content_scripts": [
{
"matches": [
"some_website_url"
],
"js": [
"content_script.js"
],
"run_at": "document_start"
}
]
...
*/
///content_script.js
const mutationObserver = new MutationObserver((mutations) => {
for (const { addedNodes } of mutations) {
for (const node of addedNodes) {
if (node.tagName) {
if (node.querySelector(potentially_hidden_element_selector)) {
chrome.storage.sync.get("courses", ({ courses }) => {
chrome.storage.sync.set({ "courses": generateCourseList(courses) }, () => {
const courseElements = Array.from(node.closest('ul').querySelectorAll('a[data-parent-key="mycourses"]'))
courseElements.forEach(courseElement => {
const courseName = getCourseName(courseElement)
const isVisible = courses[courseName]
updateCourseElementInSidebar(courseElement, isVisible)
})
})
})
// We found what we were looking for so stop searching
mutationObserver.disconnect()
}
}
}
}
})
mutationObserver.observe(document, { childList: true, subtree: true })
EDIT 1:
My generateCourseList method depends on the DOM elements I may try to hide - so I can't call the chrome.storage.set method before the DOM has loaded I think.
When I refresh the page, a list of courses eventually populates the DOM.
I then populate the storage's courses object based on these course elements' innerText properties. I set each of these elements' visibility to true or false based on one of two factors: if this course is already defined in the courses object, keep its visibility status, if it isn't, set it to true (visible by default).
I can't make certain DOM elements visible/hidden if I don't have reference to them though. So if I try to call generateCourseList before those specific DOM elements have loaded, I end up trying to retrieve all the course elements (document.querySelectorAll('a[data-parent-key="mycourses"]')) and get returned nothing. I end up setting courses in chrome.storage to nothing because of this chrome.storage.sync.set({ "courses": generateCourseList(courses) }....
EDIT 2:
Here is all of my code. I try to chrome.storage.sync.get as soon as I can, and I try to not depend on the result of chrome.storage.sync.set.
I try to delete the elements as soon as I can, but I'm having difficulty doing so. This is because I have difficulty knowing when the content I want to access (the course elements) have fully loaded. Previously, I was detecting when one course element was visible, and when it was, I assumed all were. This was a mistake. I was able to access the one courselement the moment it popped up, but sometimes only 4 of the 6 course elements were actually loaded. I can't hardcode this number, because it changes from person to person. I can't just tackle them one by one, because then I wouldn't know when to disconnect the MutationObserver. I used the debugger and tried to find what element is loaded soon after all 6 course elements are loaded, and that is the header#page-header.row element. I still get a flicker, though less noticeable than before.
Anything I can do to make it even less noticeable?
function start_mutation_observer() {
chrome.storage.sync.get({ 'savedCourses': {} }, ({ savedCourses }) => {
const observer = new MutationObserver((mutations) => {
for (const { addedNodes } of mutations) {
for (const node of addedNodes) {
// The page header gets updated AFTER the courseList is updated - so once it's in the page, we know the courseElements are too
if (document.querySelector('header#page-header.row')) {
observer.disconnect()
const generatedCourses = generateCourseList(savedCourses)
const courseElements = getCourseElements()
// Set visibility of course elements
courseElements.forEach(courseElement => {
const courseName = getCourseElementTextContent(courseElement);
const isShown = generatedCourses[courseName];
setCourseElementVisibility(courseElement, isShown);
});
chrome.storage.sync.set({ 'savedCourses': generatedCourses });
return
}
}
}
});
observer.observe(document, { childList: true, subtree: true });
// In case the content script has been injected when some of the DOM has already loaded
onMutation([{ addedNodes: [document.documentElement] }]);
});
}
function getCourseElements() {
const COURSE_ELEMENT_SELECTOR = 'ul > li > a[data-parent-key="mycourses"]'
return Array.from(document.querySelectorAll(COURSE_ELEMENT_SELECTOR))
}
function getCourseElementTextContent(courseElement) {
const COURSE_ELEMENT_TEXT_CONTAINER_SELECTOR = 'a[data-parent-key="mycourses"] > div > div > span.media-body'
return courseElement.querySelector(COURSE_ELEMENT_TEXT_CONTAINER_SELECTOR).textContent
}
function generateCourseList(savedCourses) {
// Turns [[a, b], [b,c]] into {a:b, b:c}
return Object.fromEntries(getCourseElements().map(courseElement => {
const courseName = getCourseElementTextContent(courseElement)
const isShown = savedCourses[courseName] ?? true
return [courseName, isShown]
}))
}
function setCourseElementVisibility(courseElement, isShown) {
if (isShown) {
courseElement.style.display = "block"
} else {
courseElement.style.display = "none"
}
}
start_mutation_observer()
EDIT 3:
I think it's as good as can be now. I only refresh the visibility of the course elements that were just loaded into the DOM. There's essentially no flicker now (there is a slight one, but its' the same amount of flickering without my extension).
Here is the code for the MutationObserver
function start_mutation_observer() {
let handledCourseElements = new Set()
chrome.storage.sync.get({ 'savedCourses': {} }, ({ savedCourses }) => {
const observer = new MutationObserver((mutations) => {
for (const { addedNodes } of mutations) {
for (const node of addedNodes) {
const courseElements = getCourseElements()
const courseElementsAdded = courseElements.length > handledCourseElements.size
// If a courseElement was added, update visibility of those that weren't already processed
if (courseElementsAdded) {
const generatedCourses = generateCourseList(savedCourses)
courseElements
.filter(courseElement => !handledCourseElements.has(courseElement))
.forEach(courseElement => {
const courseName = getCourseElementTextContent(courseElement)
const courseShouldBeVisible = generatedCourses[courseName];
setCourseElementVisibility(courseElement, courseShouldBeVisible);
handledCourseElements.add(courseElement)
})
}
// The page header gets updated AFTER the courseList is updated - so once it's in the page, we know the courseElements are too
if (document.querySelector('header#page-header.row')) {
observer.disconnect()
chrome.storage.sync.set({ 'savedCourses': generateCourseList(savedCourses) });
return
}
}
}
});
observer.observe(document, { childList: true, subtree: true });
// In case the content script has been injected when some of the DOM has already loaded
onMutation([{ addedNodes: [document.documentElement] }]);
});
}
Reading storage is slow and asynchronous, so you need to do it at the beginning:
chrome.storage.sync.get('courses', ({ courses }) => {
chrome.storage.sync.set({ 'courses': generateCourseList(courses) });
const observer = new MutationObserver(onMutation);
observer.observe(document, { childList: true, subtree: true });
onMutation([{addedNodes: [document.documentElement]}]);
function onMutation(mutations) {
for (const { addedNodes } of mutations) {
for (const node of addedNodes) {
if (node.tagName && node.querySelector(potentially_hidden_element_selector)) {
observer.disconnect();
processNode(node, courses);
}
}
}
}
});
function processNode(node, courses) {
const courseElements = Array.from(
node.closest('ul').querySelectorAll('a[data-parent-key="mycourses"]'));
courseElements.forEach(courseElement => {
const courseName = getCourseName(courseElement);
const isVisible = courses[courseName];
updateCourseElementInSidebar(courseElement, isVisible);
});
}
my code is :
function autocomplet() {
var min_length = 0; // min caracters to display the autocomplete
var keyword = $('#country_id').val();
if (keyword.length >= min_length) {
$.ajax({
url: 'ajaxname.php',
type: 'POST',
data: {keyword:keyword},
success:function(data){
$('#country_list_id').show();
$('#country_list_id').html(data);
}
});
} else {
$('#country_list_id').hide();
}
}
function set_item(item) {
// change input value
$('#country_id').val(item);
// hide proposition list
$('#country_list_id').hide();
}
and i wana hide ul (country_list_id) when user click on anywhere ?
and im not good in ajax :(
so any one can edit this code
Assuming you just want to hide the id when the user click basically anything.
Then here.
$(document).on("click", () => {
$('#country_list_id').hide();
})
Facebook claims its embedded posts are adjusted automatically based on the screen sizes.
Please see Can I customize the width of Embedded Posts? section in the below link.
https://developers.facebook.com/docs/plugins/embedded-posts
However, the embed doesn't seem to be responsive. Please see my test here,
http://colombowebs.com/test/fb/
Is there anything I have to do in addition to make it responsive?
You have to use javascript/jquery to obtain the desired result. I have taken help from responsive function and created the following which works almost for all widths.
(function ($) {
jQuery.fn.autoResizeFbPost = function () {
var fixWidth = function ($container, $clonedContainer, doParse) {
// default parameter.
doParse = typeof doParse == 'undefined' ? true : doParse;
var updatedWidth = $container.width();
// update all div.fb-post with correct width of container
var isMobile = window.matchMedia("only screen and (max-width: 600px)");
if (isMobile.matches) {
//Conditional script here
if (window.matchMedia("(orientation: portrait)").matches) {
// you're in PORTRAIT mode
updatedWidth = $(window).width();
}
if (window.matchMedia("(orientation: landscape)").matches) {
// you're in LANDSCAPE mode
updatedWidth = $(window).height();
}
}
$clonedContainer
.find('div.fb-post')
.each(function () {
$(this).attr('data-width', updatedWidth);
});
$('div.embedded', $clonedContainer).each(function () {
$(this).attr('max-width', updatedWidth);
});
// update page with adjusted markup
$container.html($clonedContainer.html());
//should we call FB.XFBML.parse? we don't want to do this at page load because it will happen automatically
if (doParse && FB && FB.XFBML && FB.XFBML.parse)
FB.XFBML.parse();
};
return this.each(function () {
var $container = $(this),
$clonedContainer = $container.clone();
// make sure there is a .fb-post element before we do anything.
if (!$container.find('div.fb-post').length) {
return false;
}
// execute once (document.ready) and do not call FB.XFBML.parse()
fixWidth($container, $clonedContainer, false);
$(window).bind('resize', function () {
fixWidth($container, $clonedContainer);
}).trigger('resize');
});
};
})(jQuery);
(function ($) {
$(document).ready(function () {
$('#post').autoResizeFbPost();
});
})(jQuery);
And your HTML should be like
<div style="background-color: white;" id="post">
<div class="fb-post" data-href="your-facebook-post-url" mobile="false"></div>
Hope this helps you. Feel free to post your comments.
I am able to take screenshot of the page using the example code below:
html2canvas(document.body, {
onrendered: function(canvas) {
document.body.appendChild(canvas);
}
});
Now there are certain div's i dont want to be part of the page when I take the screenshot?
How can i prevent them from being part of the screenshot.
One way I thought was to clone the element and then remove the elements, but taking a screenshot of the clone gives a white screen. Here is the code I used:
html2canvas($(document.body).clone()[0], {
onrendered: function(canvas) {
document.body.appendChild(canvas);
}
});
Add this attribute: data-html2canvas-ignore to any element you don't want to be taken when the screenshot is processed.
Hopefully this will help the next guy.
When I used this library I faced a problem that the lib download all the images in my application, that cause the application to run slowly. I resolved the problem using the ignoreElements option.
This is my code:
var DropAreaElement= document.getElementById("123");
var config= {
useCORS: true,
ignoreElements: function (element) {
if (element.contains(DropAreaElement) || element.parentElement.nodeName =="HTML" || element == DropAreaElement || element.parentNode == DropAreaElement) {
console.log("elements that should be taken: ", element)
return false;
}else {
return true;
}
}
};
html2canvas(DropAreaElement, config).then(function (canvas){
var imgBase64 = canvas.toDataURL('image/jpeg', 0.1);
console.log("imgBase64:", imgBase64);
var imgURL = "data:image/" + imgBase64;
var triggerDownload = $("<a>").attr("href", imgURL).attr("download", "layout_" + new Date().getTime() + ".jpeg").appendTo("body");
triggerDownload[0].click();
triggerDownload.remove();
}).catch(Delegate.create(this, function (e){
console.error("getLayoutImageBase64 Exception:", e);
});
If you don't want to use an attribute, html2canvas does provide a method to remove elements. For example:
html2canvas( document.body, {
ignoreElements: function( element ) {
/* Remove element with id="MyElementIdHere" */
if( 'MyElementIdHere' == element.id ) {
return true;
}
/* Remove all elements with class="MyClassNameHere" */
if( element.classList.contains( 'MyClassNameHere' ) ) {
return true;
}
}
} ).then( function( canvas ) {
document.body.appendChild( canvas );
} );
For more information, see html2canvas options.
You can create HOC for <Printable/> and <NonPrintable/> , you can wrap your component with <NonPrintable><YourCoolComponent/></NonPrintable>
those children components would be excluded.
import React from "react"
interface INonPrintable {
children: React.ReactChildren
}
/*
HOC - Printable which injects the printId to the React component
which gets us Printable Context to html2canvas => jsPDF
eg:
<Printable printId="about-you-print">
<PersonalInfo badEmail={badEmail} />
<IdentityInfo />
<AdditonalInfo />
<AddressInfo
serviceAddress={serviceAddress}
billingAddress={this.state.billingAddress}
setBillingAddress={this.setBillingAddress}
/>
</Printable>
*/
export default function Printable({ printId = "", children, ...restProps }) {
return <div print-id={printId} {...restProps}>{children}</div>
}
/*
HOC - NONPrintable which injects the data-html2canvas-ignore to the React component
which gets us Printable Context to html2canvas => jsPDF
eg:
<NonPrintable style={{display:"flex",justifyContent:'space-around'}}>
<Button
text="Print PDF using Own utility"
onClick={this.handlePrintPdf}
/>
<Button
text="Print PDF using html2canvas + jsPDF"
onClick={this.handlePrintwithPDFjs}
/>
</NonPrintable>
*/
export const NonPrintable = ({ children, ...restProps }) => {
return <div data-html2canvas-ignore {...restProps}>{children}</div>
}
I want to run JavaScript function just after user select a value using autocomplete textbox bootstrap Typeahead.
I'm searching for something like selected event.
$('.typeahead').on('typeahead:selected', function(evt, item) {
// do what you want with the item here
})
$('.typeahead').typeahead({
updater: function(item) {
// do what you want with the item here
return item;
}
})
For an explanation of the way typeahead works for what you want to do here, taking the following code example:
HTML input field:
<input type="text" id="my-input-field" value="" />
JavaScript code block:
$('#my-input-field').typeahead({
source: function (query, process) {
return $.get('json-page.json', { query: query }, function (data) {
return process(data.options);
});
},
updater: function(item) {
myOwnFunction(item);
var $fld = $('#my-input-field');
return item;
}
})
Explanation:
Your input field is set as a typeahead field with the first line: $('#my-input-field').typeahead(
When text is entered, it fires the source: option to fetch the JSON list and display it to the user.
If a user clicks an item (or selects it with the cursor keys and enter), it then runs the updater: option. Note that it hasn't yet updated the text field with the selected value.
You can grab the selected item using the item variable and do what you want with it, e.g. myOwnFunction(item).
I've included an example of creating a reference to the input field itself $fld, in case you want to do something with it. Note that you can't reference the field using $(this).
You must then include the line return item; within the updater: option so the input field is actually updated with the item variable.
first time i've posted an answer on here (plenty of times I've found an answer here though), so here's my contribution, hope it helps. You should be able to detect a change - try this:
function bob(result) {
alert('hi bob, you typed: '+ result);
}
$('#myTypeAhead').change(function(){
var result = $(this).val()
//call your function here
bob(result);
});
According to their documentation, the proper way of handling selected event is by using this event handler:
$('#selector').on('typeahead:select', function(evt, item) {
console.log(evt)
console.log(item)
// Your Code Here
})
What worked for me is below:
$('#someinput').typeahead({
source: ['test1', 'test2'],
afterSelect: function (item) {
// do what is needed with item
//and then, for example ,focus on some other control
$("#someelementID").focus();
}
});
I created an extension that includes that feature.
https://github.com/tcrosen/twitter-bootstrap-typeahead
source: function (query, process) {
return $.get(
url,
{ query: query },
function (data) {
limit: 10,
data = $.parseJSON(data);
return process(data);
}
);
},
afterSelect: function(item) {
$("#divId").val(item.id);
$("#divId").val(item.name);
}
Fully working example with some tricks. Assuming you are searching for trademarks and you want to get the selected trademark Id.
In your view MVC,
#Html.TextBoxFor(model => model.TrademarkName, new { id = "txtTrademarkName", #class = "form-control",
autocomplete = "off", dataprovide = "typeahead" })
#Html.HiddenFor(model => model.TrademarkId, new { id = "hdnTrademarkId" })
Html
<input type="text" id="txtTrademarkName" autocomplete="off" dataprovide="typeahead" class="form-control" value="" maxlength="100" />
<input type="hidden" id="hdnTrademarkId" />
In your JQuery,
$(document).ready(function () {
var trademarksHashMap = {};
var lastTrademarkNameChosen = "";
$("#txtTrademarkName").typeahead({
source: function (queryValue, process) {
// Although you receive queryValue,
// but the value is not accurate in case of cutting (Ctrl + X) the text from the text box.
// So, get the value from the input itself.
queryValue = $("#txtTrademarkName").val();
queryValue = queryValue.trim();// Trim to ignore spaces.
// If no text is entered, set the hidden value of TrademarkId to null and return.
if (queryValue.length === 0) {
$("#hdnTrademarkId").val(null);
return 0;
}
// If the entered text is the last chosen text, no need to search again.
if (lastTrademarkNameChosen === queryValue) {
return 0;
}
// Set the trademarkId to null as the entered text, doesn't match anything.
$("#hdnTrademarkId").val(null);
var url = "/areaname/controllername/SearchTrademarks";
var params = { trademarkName: queryValue };
// Your get method should return a limited set (for example: 10 records) that starts with {{queryValue}}.
// Return a list (of length 10) of object {id, text}.
return $.get(url, params, function (data) {
// Keeps the current displayed items in popup.
var trademarks = [];
// Loop through and push to the array.
$.each(data, function (i, item) {
var itemToDisplay = item.text;
trademarksHashMap[itemToDisplay] = item;
trademarks.push(itemToDisplay);
});
// Process the details and the popup will be shown with the limited set of data returned.
process(trademarks);
});
},
updater: function (itemToDisplay) {
// The user selectes a value using the mouse, now get the trademark id by the selected text.
var selectedTrademarkId = parseInt(trademarksHashMap[itemToDisplay].value);
$("#hdnTrademarkId").val(selectedTrademarkId);
// Save the last chosen text to prevent searching if the text not changed.
lastTrademarkNameChosen = itemToDisplay;
// return the text to be displayed inside the textbox.
return itemToDisplay;
}
});
});