I want to create a chrome extension to add a button to a particular page, and upon clicking that button, I want a popup to appear as shown on https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_popup
I have used content script, I've included the css stuff from that link in a .css file, and I have a .js file for the content script that injects a button on the screen.
My button is appearing on the screen. What I want to know is, how do I get the popup as shown in the link to appear? They have used an html file in the link, but I am making changes in an already existing html page through a content script. So how do I go about it?
My .js file for content script:
var button = document.createElement("button");
//button description
var body = document.getElementsByClassName("htmlclassname")[0];
body.insertBefore(button, body.childNodes[0]);
//Button appearing properly
button.addEventListener("click", function() {
//What code do I put here to get a popup like in the link??????
});
You need to inject all the DOM for your popup, as well as the button.
You can do this in the click event for the button:
var button = document.createElement('button');
button.innerText = 'Show Popup';
button.style.position = 'relative';
document.querySelector('body').appendChild(button);
button.addEventListener('click', function(e) {
var popup = document.querySelector('#myPopup');
if (!popup) {
popup = document.createElement('div');
popup.style.visibility = 'hidden';
popup.style.width = '160px';
popup.style.backgroundColor = '#555';
popup.style.color = '#fff';
popup.style.textAlign = 'center';
popup.style.borderRadius = ' 6px';
popup.style.padding = '8px 0';
popup.style.position = 'absolute';
popup.style.zIndex = '1';
popup.style.bottom = '125%';
popup.style.left = '50%';
popup.style.marginLeft = '-80px';
popup.innerText = 'A Simple Popup!';
popup.id = 'myPopup';
button.appendChild(popup);
}
if (popup.style.visibility === 'hidden')
popup.style.visibility = 'visible';
else
popup.style.visibility = 'hidden';
});
<div>Content already in page.
<p>blah blah blah</p>
</div>
You may want to check Getting Started: Building a Chrome Extension which shows how you can implement opening a popup window after clicking an icon. As mentioned in the given link, the actual logic of rendering the content of the popup is implemented by popup.js.
Then, after you've got your first extension up and running, you can fiddle your code with things exactly how you want it like setting a tooltip on the browser action button.
Tooltips can be set by specifying the default_title key in the manifest file. Open manifest.json, and add the default_title key to the browser_action. Make sure that the JSON is valid, so quote the key and add a comma where necessary.
Sample code:
{
...
"browser_action": {
"default_icon": "icon.png",
"default_popup": "popup.html",
"default_title": "Click here!"
},
...
}
Suggested solution in this related SO post might also help.
Related
I'm making a Chrome extension that acts on Facebook's newsfeed. I'm trying to select the URL starting with "https://external-ort2-2.xx" from Facebook's "_q7o" div and log it to the console (function capturePic). The earlier code, which inserts a button after the "_q7o" div, works fine, so I think I'm selecting the right div. But URL isn't getting logged.
Many thanks!
function callAttentionToX(jNode) {
var uCW = jNode.closest("div._q7o");
var button = document.createElement("a");
button.innerHTML = "I'm a button";
button.style.float= "left";
uCW.append(button);
}
function capturePic(jNode) {
var uCW = jNode.closest("div._q7o");
var firstHref = $(".uCW a[href^='https://external-ort2-2.xx']").attr("href");
console.log(firstHref);
}
waitForKeyElements("[aria-label$='Story options']", callAttentionToX, capturePic);
I have an image gallery on my site and when you click on it, it opens into a lightbox kind of effect.
I want them to be able to click off of the preview image on the lightbox background and close the preview but not if they click on the actual preview image itself.
function get_image_preview(){
var lightbox = document.getElementById("lightbox");
var image_src = document.getElementById("gallery_image").src;
lightbox.style.display = "block";
lightbox.setAttribute("onclick", "end_image_preview()");
var new_image = document.createElement("img");
new_image.setAttribute("id", "preview_image");
new_image.setAttribute("src", image_src);
new_image.setAttribute("onclick", "return false");
lightbox.appendChild(new_image);
}
function end_image_preview(){
var lightbox = document.getElementById("lightbox");
lightbox.style.display = "none";
lightbox.innerHTML = "";
}
So basically this line:
lightbox.setAttribute("onclick", "end_image_preview()");
does what it is supposed to do and close the preview.
However, the preview is a child of this and I want them to be able to click on the image without ending the preview, so I tried this:
new_image.setAttribute("onclick", "return false");
I think you mignt want to use event.stopPropagation():
function new_image_click(e) {
e.stopPropagation();
}
new_image.setAttribute("onclick", "new_image_click(event)");
in your end image preview click listener make sure that the element does not have in its ancestor the preview element it self, lets say that you gave the preview element the id "preview"
in end_image_preview
function end_image_preview(e) {
if (e.closest('#preview')) {
return
}
// here do what you already doing
}
I have a script that runs if a button is pressed that creates a new window with a new button. I want to add a video to this page, how can I do that? This is the script that creates the page. Very new to html/javascript sorry if this is a stupid question
var w = window.open(''),
button = w.document.createElement('button');
button.innerHTML = 'Start Test';
button.addEventListener('click', function () {
w.alert('!');
});
var container = w.document.createElement('div');
container.id = 'buttonParent';
w.document.body.appendChild(container);
container.appendChild(button);
You should be able to add this to the page using HTML video tags:
http://www.w3schools.com/html/html5_video.asp
var button = document.createElement("button");
button.type = "button";
button.className = "button";
button.innerText = "OK";
button.addEventListener("click", function () {
console.log("Hello!");
}, false);
When I do this, the button never gets that event listener. I've tried attachEvent, button.onclick, and nothing seems to work. The button shows up fine with the class and text.
EDIT: So basically what I'm trying to do is programmatically show a "popup" array of divs.
Here is a screenshot of what it looks like: http://i.imgur.com/IqaOq.png, and I set it up like this: var x = new JMTK.Custom.MessageDialog(), then to add a popup, I just type x.addMessage({template: {type: JMTK.Custom.MessageDialog.templates.alert, title: "Alert title", message: "This is a message here", button1: {text: "Hello"}}})
This is the addMessage():
var content = document.createElement("div");
//htmlObject.template is the object that has all the info, 'this' is the scrim element that contains each "white" popup"
content.innerHTML = MessageDialogClass.html.alert(htmlObject.template, this).innerHTML
which calls this function:
alert: function (template, element) {
//Array of functions
var callbacks = MessageDialogClass.callbacks;
var alert = document.createElement("div");
var id = Date.now();
alert.id = id;
var header = document.createElement("h1");
header.innerText = (template.title ? template.title : "ALERT");
var paragraph = document.createElement("p");
paragraph.innerText = (template.message ? template.message : "No message specified")
var button = document.createElement("button");
button.type = "button";
button.className = "button";
button.innerText = (template.button1.text ? template.button1.text : "OK");
button.addEventListener("click", function () {
if (template.button1.callback) {
template.button1.callback();
}
//MessageDialogClass.popElement(id);
//delete callbacks.id;
}, false);
alert.appendChild(header);
alert.appendChild(paragraph);
alert.appendChild(button);
callbacks.id = alert;
return alert;
},
But again, when I click on the button, nothing happens, and in the DOM Explorer there is no onclick attribute.
It's hard to say what your solution might be. You've provided good detail about what you want to do with the button click, but I'm afraid there's something else at play. I wonder if you have an element in front of the button that keeps it from receiving the mouse click. I see you're in a WinJS project for Windows 8. You have really good dev tools in VS2012. Break just after you add the button to your DOM and go to the DOM Explorer and see if you find the button. Go to the JavaScript Console and see if you can access the button. See if you can add an event listener manually there. Try adding the button manually in your markup and then see if adding an event works. Hope one of these gets you to the solution. Good luck.
The issue was that I was creating a div in my 'alert' template, and then setting the innerHTML of another div to that div. So it wouldn't allow me to set the event listener because it wasn't part of the DOM.
So instead of doing
var content = document.createElement("div");
//htmlObject.template is the object that has all the info, 'this' is the scrim element that contains each "white" popup"
content.innerHTML = MessageDialogClass.html.alert(htmlObject.template, this).innerHTML
I just did
var content = document.createElement("div");
//htmlObject.template is the object that has all the info, 'this' is the scrim element that contains each "white" popup"
content = MessageDialogClass.html.alert(htmlObject.template, this).innerHTML
because alert is returning a div already. So yeah, it had to do with setting the innerHTML rather than just setting it equal to the DOM node.
I think you need append your button before set the event listener.
I'm going to develop a firefox extension which adds a button beside the file input fields (the <input type="file"> tag) when a file is selected.
The file overlay.js, which contains the extension's logic, manages the "file choose" event through this method:
var xpitest = {
...
onFileChosen: function(e) {
var fileInput = e.explicitOriginalTarget;
if(fileInput.type=="file"){
var parentDiv = fileInput.parentNode;
var newButton = top.window.content.document.createElement("input");
newButton.setAttribute("type", "button");
newButton.setAttribute("id", "Firefox.Now_button_id");
newButton.setAttribute("value", "my button");
newButton.setAttribute("name", "Firefox.Now_button_name");
parentDiv.insertBefore(newButton, fileInput);
}
}
...
}
window.addEventListener("change", function(e) {xpitest.onFileChosen(e)},false);
My problem is that, everytime I choose a file, a new button is being added, see this picture:
http://img11.imageshack.us/img11/5844/sshotn.png
If I select the same file more than once, no new button appears (this is correct).
As we can see, on the first file input, only one file has been selected.
On the second one I've chosen two different files, in effect two buttons have been created...
On the third, I've chosen three different files.
The correct behavior should be this:
when a file is chosen, create my_button beside the input field
if my_button exists, delete it and create another one (I need this, beacuse I should connect it to a custom event which will do something with the file name)
My question is: how can I correctly delete the button? Note that the my_button html code does not appear on page source!
Thanks
Pardon me if I'm thinking too simply, but couldn't you just do this?
var button = document.getElementById('Firefox.Now_button_id')
button.parentNode.removeChild(button)
Is this what you were looking for? Feel free to correct me if I misunderstood you.
Solved. I set an ID for each with the following method:
onPageLoad: function(e){
var inputNodes = top.window.content.document.getElementsByTagName("input");
for(var i=0; i<inputNodes.length; i++){
if(inputNodes[i].type=="file")
inputNodes[i].setAttribute("id",i.toString());
}
}
I call this method only on page load:
var appcontent = document.getElementById("appcontent"); // browser
if(appcontent)
appcontent.addEventListener("DOMContentLoaded", xpitest.onPageLoad, true);
Then I've modified the onFileChosen method in this way:
onFileChosen: function(e) {
var fileInput = e.explicitOriginalTarget;
if(fileInput.type=="file"){
var parentDiv = fileInput.parentNode;
var buttonId = fileInput.id + "Firefox.Now_button_id";
var oldButton = top.window.content.document.getElementById(buttonId);
if(oldButton!=null){
parentDiv.removeChild(oldButton);
this.count--;
}
var newButton = top.window.content.document.createElement("input");
newButton.setAttribute("type", "button");
newButton.setAttribute("id", buttonId);
newButton.setAttribute("value", "my button");
newButton.setAttribute("name", "Firefox.Now_button_name");
parentDiv.insertBefore(newButton, fileInput);
this.count++;
}
}