I have a script that redirects the user to another page. I want to load some content into a div on the new page after the new page has fully loaded. How can I do this. The following doesn't work.
function goToPage() {
window.location.href = 'http://www.mypage.com/info';
$('.my_class').load('my/url/path/with/content/to/load');
}
The newly loaded page http://www.mypage.com/info contains the following div:
<div class="my_class"></div>
What am I doing wrong?
Redirect to the new page, but append a hash signal to the URL.
function goToPage() {
window.location.href = 'http://www.mypage.com/info#load-stuff;
}
Then on load of the target page, evaluate the URL checking for that hash signal.
function pageLoad() {
if (window.location.hash === "#load-stuff") {
$('.my_class').load('my/url/path/with/content/to/load');
}
}
If your application is using jQuery it'd look something like:
$(function () {
if (window.location.hash === "#load-stuff") {
$('.my_class').load('my/url/path/with/content/to/load');
}
});
That's the rough idea at least.
As pointed out in the other answers, you won't be able to perform any script instructions from your original site. Instead of using PHP to create the content statically, you could also use HTML fragments as arguments, e.g. like this:
// in the original page:
function goToPage() {
window.location.href = 'http://www.mypage.com/info#my/url/path/with/content/to/load';
}
// in http://www.mypage.com/info:
$( document ).ready(function () {
if(window.location.hash)
$('.my_class').load(window.location.hash.substring(1));
}
An easy way to pass data to your page you are redirecting to would be to set some url parameters.
For example:
window.location.href - "http://youpage.com/?key=value"
When that page loads you could have a:
$(document).ready(function(){
var my_param = getUrlParameter('key');
if(my_param == "value"){
//do your stuff here
}
});
var getUrlParameter = function getUrlParameter(sParam) {
var sPageURL = decodeURIComponent(window.location.search.substring(1)),
sURLVariables = sPageURL.split('&'),
sParameterName,
i;
for (i = 0; i < sURLVariables.length; i++) {
sParameterName = sURLVariables[i].split('=');
if (sParameterName[0] === sParam) {
return sParameterName[1] === undefined ? true : sParameterName[1];
}
}
};
You should just run
$('.my_class').load('my/url/path/with/content/to/load');
on this page: http://www.mypage.com/info.
When you do window.location.href = 'http://www.mypage.com/info'; you're redirecting to another page. Nothing after that line will happen. You have to instead run the code after that line on the page that's loaded.
You can do this a few different ways. Try leveraging the localstorage API and passing info or content with a name and value pair (or a few of them) and unpack it on the receiving end.
On the page you're redirecting to, check for the localstorage key, and then load the contents of it (the aforementioned name and value pairs) into a div.
As an alternative, you can write one script file that you can deploy to several pages; do a check on window.location.href and conditionally load script accordingly. If you're on the redirected page, you can run whatever script you like. The nice part about doing it this way is that you're still working with one JS file - no need to fragment your code (assuming, of course, that the pages you're working with are all on the same site).
You don't need to do anything with php if you don't want to, or hashes... there's a few nifty tools that will do the trick if you can leverage HTML5 and its associated APIs.
window.location = '#/MyPage';
setTimeout(function() {
//MyCode To Run After PageLoad
});
You are redirecting the browser with window.location.href and I'm afraid as you are purely just changing the browser's location, you can't have any affect/input on the page you are moving to (unless you use query string parameters and then create content with something like PHP (myurl.php?newcontent=whatever) )
Once you redirect you can no longer execute scripts on that page, as the page is unloaded.
Try this,
redirect page:
function goToPage() {
window.location.href = 'http://www.mypage.com/info;
}
mypage.com/info:
js:
$('.my_class').load('my/url/path/with/content/to/load');
html:
<div class="my_class"></div>
I hope this helped you out, and let me know if you need further assistance!
Related
I'm attempting to use javascript to determine if the user is using a certain language and if they're not using english then for the page to load a different page BUT with the params of which I've grabbed from the url.
I have been able to load the page with the params but I keep falling into a loop reloading the page, even after skimming through the countless other examples, such as: this or this.
function locateUserLanguage() {
var languageValue = (navigator.languages ? navigator.languages[0] : (navigator.language || navigator.userLanguage)).split('-');
var url = window.location.href.split('?');
var baseUrl = url[0];
var urlParams = url[1];
if (languageValue[0] === 'en') {
console.log('no redirect needed, stay here.');
} else {
// I tried to set location into a variable but also wasn't working.
// var newURL = window.location.href.replace(window.location.href, 'https://www.mysite.dog/?' + urlParams);
window.location.href = 'https://www.mysite.dog/?' + urlParams
}
} locateUserLanguage();
I've attempted to place a return true; as well as return false; but neither stop the loop.
I've tried window.location.replace(); and setting the window.location.href straight to what I need, but it's continuing to loop.
There is a possibility that the script in which this function is written is executed in both of your pages (english and non-english) on load. So, as soon as the page is loaded, locateUserLanguage function is executed in both english and non-english website causing the infinite loop.
You need to put a check before you call locateUserLanguage function.
Suppose english website has url = "www.myside.com" and non-english website has url "www.myside.aus". So the condition needs to be
if (window.location.host === "www.myside.com") { locateUserLanguage() }
This will make sure that locateUserLanguage is called only in english website.
Or other apporach can be to load this script only in english website which will avoid the usage of conditional statement.
Hope it helps. Revert for any doubts.
When my website loads the javascript below it navigates to the correct anchor tag, but when the remainder of the page is loaded (other content via javascript + ajax) a split second later the page is pushed down way beyond the anchor tag. Is there anyway to call window.location (the javascript below) after all other php + javascript is loaded?
<script>
window.location = (""+window.location).replace(/#[A-Za-z0-9_]*$/,'')+"#<?php echo $windowlocation; ?>"
</script>
If you are loading via ajax, then you can presumably use the call back methods and some kind of method to check for when they are all done.
var sectionsLoaded = 0;
var numSections = 1; // number of sections you are loading
$.ajax({
...
complete: function(){
doneLoading();
}
});
function doneLoading(){
sectionsLoaded++;
if(sectionsLoaded == numSections) {
//Do something
}
}
Hopefully this answers your question, or is at least in someway useful. Also to be clear the PHP isn't loading. It is being executed on the backend and does nothing to the front end. (you might already know this just the way your question was worded was a bit confusing)
These solutions should work:
<body onload="script();">
or
document.onload = function ...
or even
window.onload = function ...
A javascript with "IF" statement written in all pages header template and which is unnecessary only for a specific page, is it possible to disable that statement for a specific page. Below is the javascript which make external links to open in new tab, can i disable this small script only for a google custom search page because the result links have google(external) url which redirects to website(internal), that's why script is reading links as external. Or is there some better way than disabling the if statement? If anyone knows how to solve this problem, please help
Javascript:
$(document).ready(function() {
$('a').each(function() {
var a = new RegExp('/' + window.location.host + '/');
if (!a.test(this.href)) {
$(this).attr("target", "_blank");
}
});
});
One way to do it for multiple pages, like this:
var excludedPages = ['blockpage1.html', 'blockpage2.html'];
for (var i = 0; i < excludedPages.length; i++) {
if (location.href.indexOf(excludedPages[i]) !== -1) {
// do something if page found
console.log("this page is blocked for extra code");
} else {
// do something if page not found in the list
console.log("this page is not included in block list");
}
}
EDIT
Note: The only thing to be aware of with JavaScript, it is running on client side (browser side) and any one with basic web development knowledge are able to change the block site or edit any the site content. This make it possible getting access to what ever site that was blocked. So it all depends how important your blocking mechanism and strategy.
Probably the easiest way would be to set a flag variable on the custom search page above the script, for example:
var keepInternal = true;
And then modify one line in your script to check for that flag:
$(document).ready(function() {
$('a').each(function() {
var a = new RegExp('/' + window.location.host + '/');
if (!a.test(this.href) && !keepInternal) {
$(this).attr("target", "_blank");
}
});
});
Below is my code but page load continuously,i want to load only once
window.onload = function () {
window.location.reload();
}
There are a few ways you could solve this, all of which require saving state across page loads. You could use cookies, localStorage, the location object itself, etc.
Here's a way that checks to see if there is a hash string 'reloaded' and, if not, adds it and reloads the page. Then, when it tries to execute again, the hash will be there and it will not reload:
if (location.hash.indexOf('reloaded') === -1) {
location.hash += 'reloaded';
location.reload();
}
$(document).ready(function(){
if(document.URL.indexOf("#")==-1){ //Check if the current URL contains '#'
url = document.URL+"#"; // use "#". Add hash to URL
location = "#";
location.reload(true); //Reload the page
}
});
Due to the if condition page will reload only once.
The other way to achieve this is :
(function()
{
if( window.localStorage )
{
if( !localStorage.getItem('firstLoad') )
{
localStorage['firstLoad'] = true;
window.location.reload();
}
else
localStorage.removeItem('firstLoad');
}
})();
window.onload = function ()
{
// for getting params value
function parse(val)
{
var result = "not found";
tmp = [];
location.search
.substr(1)
.split("&")
.forEach(function (item) {
tmp = item.split("=");
if (tmp[0] === val) result = decodeURIComponent(tmp[1]);
});
return result;
}
if(parse("load")!="once")
{
//sending parameter so next time it won't reload..
window.location.href += "?load=once";
window.location.reload();
}
}
By nature of visiting a page, It will only load once. You could change your code to prove this fact:
window.onload = function () {
alert("Loaded");
}
But, I would suggest the vapor.js route to detecting page load, that is, omit this onload call, because the lines of code in the onload function run after the page is loaded. I think you either don't know what your goal is or you have an entirely different problem you are trying to solve in a way that does not make sense
You built a loop,
site is loading
window.onload is triggered
reload is initiaded
site is (re-)loading
window.onload is triggered
reload is initiaded
.......
.......
Important fact for you to learn is that browsers run through your code from top to bottom and when you reload your page, the whole prozess repeats.
So every Time you reload, the window.onload event-listener is registered and calls the function attached to it, as soon as the window object is fully loaded.
There is no mechanism that tells the browser to stop.
if you would like run your Javascript code once the DOM is loaded, and you are looking for an browser independent solution i would recommend jQuery and its $( document ).ready() function.
with jQuery included to your Page:
$( document ).ready(function(){
//Code inside this function runs after your document is loaded
})
What I want to do is to run go() function in image.js file. I've googled around and I understand that is not possible to run inline scripts.
What is the best method to call the JavaScript I want? Events? Messages? Requests? Any other way?
Here is my code so far:
background.js
chrome.browserAction.onClicked.addListener(function(tab) {
var viewTabUrl = chrome.extension.getURL('image.html');
var newURL = "image.html";
chrome.tabs.create({
url : newURL
});
var tabs = chrome.tabs.query({}, function(tabs) {
for (var i = 0; i < tabs.length; i++) {
var tab = tabs[i];
if (tab.url == viewTabUrl) {
//here i want to call go() function from image.js
}
}
});
});
image.html
<html>
<body>
<script src="js/image.js"></script>
</body>
</html>
image.js
function go(){
alert('working!');
}
There are various ways to achieve this. Based on what exactly you are trying to achieve (which is not clear by your question), one way might be better than the other.
An easy way, would be to inject a content script and communicate with it through Message Passing, but it is not possible to inject content scripts into a page with the chrome-extension:// scheme (despite what the docs say - there is an open issue for correcting the docs).
So, here is one possibility: Use window.postMessage
E.g.:
In background.js:
var viewTabURL = chrome.extension.getURL("image.html");
var win = window.open(viewTabURL); // <-- you need to open the tab like this
// in order to be able to use `postMessage()`
function requestToInvokeGo() {
win.postMessage("Go", viewTabURL);
}
image.js:
window.addEventListener("message", function(evt) {
if (location.href.indexOf(evt.origin) !== -1) {
/* OK, I know this guy */
if (evt.data === "Go") {
/* Master says: "Go" */
alert("Went !");
}
}
});
In general, the easiest method to communicate between the background page and extension views is via direct access to the respective window objects. That way you can invoke functions or access defined properties in the other page.
Obtaining the window object of the background page from another extension page is straightforward: use chrome.extension.getBackgroundPage(), or chrome.runtime.getBackgroundPage(callback) if it's an event page.
To obtain the window object of an extension page from the background page you have at least three options:
Loop through the results of chrome.extension.getViews({type:'tab'}) to find the page you want.
Open the page in the first place using window.open, which directly returns the window object.
Make code in the extension page call a function in the background page to register itself, passing its window object as a parameter. See for instance this answer.
Once you have a reference to the window object of your page, you can call its functions directly: win.go()
As a side note, in your case you are opening an extension view, and then immediately want to invoke a function in it without passing any information from the background page. The easiest way to achieve that would be to simply make the view run the function when it loads. You just need to add the following line to the end of your image.js script:
go();
Note also that the code in your example will probably fail to find your tab, because chrome.tabs.create is asynchronous and will return before your tab is created.