Related
I am trying to figure out how to inject this script into a site using Tampermonkey. Here is what I have so far but the onBrazeSdkLoaded event is never being called so I don't think its being inserted correctly. I have tried a few iterations but no luck. To reference the exact script I am trying to include here is the link to the public docs.
https://www.braze.com/docs/developer_guide/platform_integration_guides/web/initial_sdk_setup/#install-gtm
const script = document.createElement("script");
var code = document.createTextNode(`+function(a,p,P,b,y){a.braze={};a.brazeQueue=[];for(var s="BrazeSdkMetadata DeviceProperties Card Card.prototype.dismissCard Card.prototype.removeAllSubscriptions Card.prototype.removeSubscription Card.prototype.subscribeToClickedEvent Card.prototype.subscribeToDismissedEvent Card.fromContentCardsJson Banner CaptionedImage ClassicCard ControlCard ContentCards ContentCards.prototype.getUnviewedCardCount Feed Feed.prototype.getUnreadCardCount ControlMessage InAppMessage InAppMessage.SlideFrom InAppMessage.ClickAction InAppMessage.DismissType InAppMessage.OpenTarget InAppMessage.ImageStyle InAppMessage.Orientation InAppMessage.TextAlignment InAppMessage.CropType InAppMessage.prototype.closeMessage InAppMessage.prototype.removeAllSubscriptions InAppMessage.prototype.removeSubscription InAppMessage.prototype.subscribeToClickedEvent InAppMessage.prototype.subscribeToDismissedEvent InAppMessage.fromJson FullScreenMessage ModalMessage HtmlMessage SlideUpMessage User User.Genders User.NotificationSubscriptionTypes User.prototype.addAlias User.prototype.addToCustomAttributeArray User.prototype.addToSubscriptionGroup User.prototype.getUserId User.prototype.incrementCustomUserAttribute User.prototype.removeFromCustomAttributeArray User.prototype.removeFromSubscriptionGroup User.prototype.setCountry User.prototype.setCustomLocationAttribute User.prototype.setCustomUserAttribute User.prototype.setDateOfBirth User.prototype.setEmail User.prototype.setEmailNotificationSubscriptionType User.prototype.setFirstName User.prototype.setGender User.prototype.setHomeCity User.prototype.setLanguage User.prototype.setLastKnownLocation User.prototype.setLastName User.prototype.setPhoneNumber User.prototype.setPushNotificationSubscriptionType InAppMessageButton InAppMessageButton.prototype.removeAllSubscriptions InAppMessageButton.prototype.removeSubscription InAppMessageButton.prototype.subscribeToClickedEvent automaticallyShowInAppMessages destroyFeed hideContentCards showContentCards showFeed showInAppMessage toggleContentCards toggleFeed changeUser destroy getDeviceId initialize isPushBlocked isPushPermissionGranted isPushSupported logCardClick logCardDismissal logCardImpressions logContentCardImpressions logContentCardsDisplayed logCustomEvent logFeedDisplayed logInAppMessageButtonClick logInAppMessageClick logInAppMessageHtmlClick logInAppMessageImpression logPurchase openSession requestPushPermission removeAllSubscriptions removeSubscription requestContentCardsRefresh requestFeedRefresh requestImmediateDataFlush enableSDK isDisabled setLogger setSdkAuthenticationSignature addSdkMetadata disableSDK subscribeToContentCardsUpdates subscribeToFeedUpdates subscribeToInAppMessage subscribeToSdkAuthenticationFailures toggleLogging unregisterPush wipeData handleBrazeAction".split(" "),i=0;i<s.length;i++){for(var m=s[i],k=a.braze,l=m.split("."),j=0;j<l.length-1;j++)k=k[l[j]];k[l[j]]=(new Function("return function "+m.replace(/\./g,"_")+"(){window.brazeQueue.push(arguments); return true}"))()}window.braze.getCachedContentCards=function(){return new window.braze.ContentCards};window.braze.getCachedFeed=function(){return new window.braze.Feed};window.braze.getUser=function(){return new window.braze.User};(y=p.createElement(P)).type='text/javascript';
y.src='https://js.appboycdn.com/web-sdk/4.2/braze.min.js';
y.async=1;(b=p.getElementsByTagName(P)[0]).parentNode.insertBefore(y,b)`);
script.text = code;
document.head.appendChild(script);
script.onload = onBrazeSdkLoaded;
A load event fires when a resource has been loaded from an external source.
Since your script is getting its program from a text node inside the script element, instead of from a URL assigned to the src attribute, there is no external source.
Consequently, there is no load event.
If you want onBrazeSdkLoaded to fire when the script you create on line 1 has loaded, then just include onBrazeSdkLoaded() in the string you assign to code.
If you want it to fire when https://js.appboycdn.com/web-sdk/4.2/braze.min.js loads, then you need to:
Ensure it is in the global scope
Write code that assigns it to y.onload inside the string you assign to code
Fix the syntax error(s) in the JS in that string
Most javascript widget which can be embedded into a website use the following structure. First you embed a code snipped like this:
<script type="text/javascript">
window.$zopim||(function(d,s){var z=$zopim=function(c){
z._.push(c)},
$=z.s=d.createElement(s),
e=d.getElementsByTagName(s)[0];
z.set=function(o){
z.set._.push(o)
};
z._=[];
z.set._=[];
$.async=!0;
$.setAttribute('charset','utf-8');
$.src='//v2.zopim.com/?2342323423434234234';
z.t=+new Date;
$.type='text/javascript';
e.parentNode.insertBefore($,e)})(document,'script');
</script>
Then, when load your page this script creates a html structure like this:
<div class="widget-class">
<iframe src="about:blank">
// the content of the widget
</iframe>
</div
I see this same structure in many chat services like:
https://en.zopim.com/
http://banckle.com/
https://www.livechatinc.com/
All have in common that their iframe does not have a src, i.e., an URL attached.
Update: Here is the script I use to load my widget code into a third party website:
<script type="text/javascript">
(function(d){
var f = d.getElementsByTagName('SCRIPT')[0], p = d.createElement('SCRIPT');
window.WidgetId = "1234";
p.type = 'text/javascript';
p.setAttribute('charset','utf-8');
p.async = true;
p.src = "//www.example.com/assets/clientwidget/chatwidget.nocache.js";
f.parentNode.insertBefore(p, f);
}(document));
</script>
I want that the CSS of the site where the GWT widget is integrated should not influence the CSS of the GWT widget. I will prevent that the CSS of the host page influence the CSS of my GWT widget.
Note: I want to have access to tho host website from my GWT widget too.
The domain of the host page is www.example.com and the domain of the iframe is www.widget.com. I also want to set cookies of the host domain from the iframe.
What is the procedure of building a widget running on such a structure? How is the content of the iframe being set? Is there a pattern for that? How can I do that with GWT
I don't know GWT, but you can easily achieve this in plain JavaScript.
Let's assume you're creating an online-count widget. At first, create an iframe:
<script id="your-widget">
// Select the script tag used to load the widget.
var scriptElement = document.querySelector("your-widget");
// Create an iframe.
var iframe = document.createElement("iframe");
// Insert iframe before script's next sibling, i.e. after the script.
scriptElement.parentNode.insertBefore(iframe, scriptElement.nextSibling);
// rest of the code
</script>
Then fetch the online count using JSONP (see What is JSONP all about?), for example:
// The URL of your API, without JSONP callback parameter.
var url = "your-api-url";
// Callback function used for JSONP.
// Executed as soon as server response is received.
function callback(count) {
// rest of code
}
// Create a script.
var script = document.createElement("script");
// Set script's src attribute to API URL + JSONP callback parameter.
// It makes browser send HTTP request to the API.
script.src = url + "?callback=callback";
Then handle server response (inside the callback() function):
// Create a div element
var div = document.createElement("div");
// Insert online count to this element.
// I assume that server response is plain-text number, for example 5.
div.innerHTML = count;
// Append div to iframe's body.
iframe.contentWindow.document.body.appendChild(div);
That's all. Your whole code could look like this:
Snippet to insert into third party website:
<script type="text/javascript">
(function(d){
var f = d.getElementsByTagName('SCRIPT')[0], p = d.createElement('SCRIPT');
window.WidgetId = "1234";
p.type = 'text/javascript';
p.setAttribute('charset','utf-8');
p.async = true;
p.id = "your-widget";
p.src = "//www.example.com/assets/clientwidget/chatwidget.nocache.js";
f.parentNode.insertBefore(p, f);
}(document));
</script>
JavaScript file on your server:
// Select the script tag used to load the widget.
var scriptElement = document.querySelector("#your-widget");
// Create an iframe.
var iframe = document.createElement("iframe");
// Insert iframe before script's next sibling, i.e. after the script.
scriptElement.parentNode.insertBefore(iframe, scriptElement.nextSibling);
// The URL of your API, without JSONP callback parameter.
var url = "your-api-url";
// Callback function used for JSONP.
// Executed as soon as server response is received.
function callback(count) {
// Create a div element
var div = document.createElement("div");
// Insert online count to this element.
// I assume that server response is plain-text number, for example 5.
div.innerHTML = count;
// Append div to iframe's body.
iframe.contentWindow.document.body.appendChild(div);
}
// Create a script.
var script = document.createElement("script");
// Set script's src attribute to API URL + JSONP callback parameter.
// It makes browser send HTTP request to the API.
script.src = url + "?callback=callback";
EDIT:
if you want your widget to not be influenced by any css from the "outside" you have to load into an iframe.
code to add to your website to load any gwt project/widget:
<iframe id="1234" src="//www.example.com/assets/Chatwidget.html" style="border: 1px solid black;" tabindex="-1"></iframe>
notice: that im NOT loading the nocache.js but the yourwidget.html file.
like this all your clases insde the frame wont be affected by any class from the outside.
to access anything outside ofthis iframe you can use jsni methods. this will only work if the domain of your iframe and the thirdpartysite are the same. otherwise youve to use window.postMessage:
public native static void yourMethod() /*-{
$wnd.parent.someMethodFromOutsideTheIframe();
}-*/;
EDIT2:
by using the snippet from above you make sure that your widget is not influened by any css from the hostpage.
to get the hostpage url from inside the widget simply add this function:
private native static String getHostPageUrl() /*-{
return $wnd.parent.location.hostname;
}-*/;
EDIT3:
since you are on 2 different domains, you have to use window.postMessage.
here one little example to get you going:
besides the iframe you have to add a event listener to the window of your example.com, that listens for the messages from your iframe. you also check if the messages comes form the correct origin.
<script>
// Create IE + others compatible event handler
var eventMethod = window.addEventListener ? "addEventListener"
: "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage"
: "message";
// Listen to message from child window
eventer(messageEvent, function(e) {
//check for the correct origin, if wanted
//if ( e.origin !== "http://www.widget.com" )
// return
console.log('parent received message!: ', e.data);
//here you can set your cookie
document.cookie = 'cookie=widget; expires=Fri, 1 Feb 2016 18:00:00 UTC; path=/'
}, false);
</script>
From inside your widget you call this method:
public native static void postMessageToParent(String message) /*-{
//message to sent, the host that is supposed to receive it
$wnd.parent.postMessage(message, "http://www.example.com");
}-*/;
i put a working example on pastebin:
javascript to insert into your page: http://pastebin.com/Y0iDTntw
gwt class with onmoduleload: http://pastebin.com/QjDRuPmg
Here's a full functional simple widget expample project I wrote in cloud9 (online IDE) with javascript, please feel free to request an access if you want to edit it, viewing is publicly available (for registered users - registration is free).
sources:
https://ide.c9.io/nmlc/widget-example,
result:
https://widget-example-nmlc.c9users.io/index.html
As for the question about how do they do it:
It seems that zopim builds their widgets gradually on the client side, defining and requiring basic modules (like these __$$__meshim_widget_components_mobileChatWindow_MainScreen), which are consist from submodules and then process everything with __$$__jx_ui_HTMLElement builder which creates HTML elements and appends them to provided parent nodes. All that compiles to the resulting HTML of the chatbox. Btw, judging by the names of some components, it seems, they build their widgets with some "meshim" library, but I have never heard of this library.
this.dom.src='about:blank'
this.appendToParent(!0)
var H=this.iwin=this.dom.contentWindow
var I=this.idoc=r.extend(H.document)
I.write(G)
I.close()
This, I guess, is the place where zopim service creates an iframe for their widgets. I'm not sure why they are using document.write instead of appendChild (document.write drops event bindings), but I have implemented both versions - they are pretty much the same except setIframeContents and addHtmlElement functions.
Hope someone will find this useful :).
1) There are many different ways to load content to iframe. Iframe have isolated content. iframe that you put in host page, does not have src, because of browser secure politic, you can't simply load content from other domains. But you can load js from other domain.For this porpuse you need usw JSONP
2) to share cookies with host page and widget iframe, you need use postMessage api like in this post
If I have a script tag like this:
<script
id = "myscript"
src = "http://www.example.com/script.js"
type = "text/javascript">
</script>
I would like to get the content of the "script.js" file. I'm thinking about something like document.getElementById("myscript").text but it doesn't work in this case.
tl;dr script tags are not subject to CORS and same-origin-policy and therefore javascript/DOM cannot offer access to the text content of the resource loaded via a <script> tag, or it would break same-origin-policy.
long version:
Most of the other answers (and the accepted answer) indicate correctly that the "correct" way to get the text content of a javascript file inserted via a <script> loaded into the page, is using an XMLHttpRequest to perform another seperate additional request for the resource indicated in the scripts src property, something which the short javascript code below will demonstrate. I however found that the other answers did not address the point why to get the javascript files text content, which is that allowing to access content of the file included via the <script src=[url]></script> would break the CORS policies, e.g. modern browsers prevent the XHR of resources that do not provide the Access-Control-Allow-Origin header, hence browsers do not allow any other way than those subject to CORS, to get the content.
With the following code (as mentioned in the other questions "use XHR/AJAX") it is possible to do another request for all not inline script tags in the document.
function printScriptTextContent(script)
{
var xhr = new XMLHttpRequest();
xhr.open("GET",script.src)
xhr.onreadystatechange = function () {
if(xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
console.log("the script text content is",xhr.responseText);
}
};
xhr.send();
}
Array.prototype.slice.call(document.querySelectorAll("script[src]")).forEach(printScriptTextContent);
and so I will not repeat that, but instead would like to add via this answer upon the aspect why itthat
Do you want to get the contents of the file http://www.example.com/script.js? If so, you could turn to AJAX methods to fetch its content, assuming it resides on the same server as the page itself.
Update: HTML Imports are now deprecated (alternatives).
---
I know it's a little late but some browsers support the tag LINK rel="import" property.
http://www.html5rocks.com/en/tutorials/webcomponents/imports/
<link rel="import" href="/path/to/imports/stuff.html">
For the rest, ajax is still the preferred way.
I don't think the contents will be available via the DOM. You could get the value of the src attribute and use AJAX to request the file from the server.
yes, Ajax is the way to do it, as in accepted answer. If you get down to the details, there are many pitfalls. If you use jQuery.load(...), the wrong content type is assumed (html instead of application/javascript), which can mess things up by putting unwanted <br> into your (scriptNode).innerText, and things like that. Then, if you use jQuery.getScript(...), the downloaded script is immediately executed, which might not be what you want (might screw up the order in which you want to load the files, in case you have several of those.)
I found it best to use jQuery.ajax with dataType: "text"
I used this Ajax technique in a project with a frameset, where the frameset and/or several frames need the same JavaScript, in order to avoid having the server send that JavaScript multiple times.
Here is code, tested and working:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<head>
<script id="scriptData">
var scriptData = [
{ name: "foo" , url: "path/to/foo" },
{ name: "bar" , url: "path/to/bar" }
];
</script>
<script id="scriptLoader">
var LOADER = {
loadedCount: 0,
toBeLoadedCount: 0,
load_jQuery: function (){
var jqNode = document.createElement("script");
jqNode.setAttribute("src", "/path/to/jquery");
jqNode.setAttribute("onload", "LOADER.loadScripts();");
jqNode.setAttribute("id", "jquery");
document.head.appendChild(jqNode);
},
loadScripts: function (){
var scriptDataLookup = this.scriptDataLookup = {};
var scriptNodes = this.scriptNodes = {};
var scriptNodesArr = this.scriptNodesArr = [];
for (var j=0; j<scriptData.length; j++){
var theEntry = scriptData[j];
scriptDataLookup[theEntry.name] = theEntry;
}
//console.log(JSON.stringify(scriptDataLookup, null, 4));
for (var i=0; i<scriptData.length; i++){
var entry = scriptData[i];
var name = entry.name;
var theURL = entry.url;
this.toBeLoadedCount++;
var node = document.createElement("script");
node.setAttribute("id", name);
scriptNodes[name] = node;
scriptNodesArr.push(node);
jQuery.ajax({
method : "GET",
url : theURL,
dataType : "text"
}).done(this.makeHandler(name, node)).fail(this.makeFailHandler(name, node));
}
},
makeFailHandler: function(name, node){
var THIS = this;
return function(xhr, errorName, errorMessage){
console.log(name, "FAIL");
console.log(xhr);
console.log(errorName);
console.log(errorMessage);
debugger;
}
},
makeHandler: function(name, node){
var THIS = this;
return function (fileContents, status, xhr){
THIS.loadedCount++;
//console.log("loaded", name, "content length", fileContents.length, "status", status);
//console.log("loaded:", THIS.loadedCount, "/", THIS.toBeLoadedCount);
THIS.scriptDataLookup[name].fileContents = fileContents;
if (THIS.loadedCount >= THIS.toBeLoadedCount){
THIS.allScriptsLoaded();
}
}
},
allScriptsLoaded: function(){
for (var i=0; i<this.scriptNodesArr.length; i++){
var scriptNode = this.scriptNodesArr[i];
var name = scriptNode.id;
var data = this.scriptDataLookup[name];
var fileContents = data.fileContents;
var textNode = document.createTextNode(fileContents);
scriptNode.appendChild(textNode);
document.head.appendChild(scriptNode); // execution is here
//console.log(scriptNode);
}
// call code to make the frames here
}
};
</script>
</head>
<frameset rows="200pixels,*" onload="LOADER.load_jQuery();">
<frame src="about:blank"></frame>
<frame src="about:blank"></frame>
</frameset>
</html>
related question
.text did get you contents of the tag, it's just that you have nothing between your open tag and your end tag. You can get the src attribute of the element using .src, and then if you want to get the javascript file you would follow the link and make an ajax request for it.
In a comment to my previous answer:
I want to store the content of the script so that I can cache it and use it directly some time later without having to fetch it from the external web server (not on the same server as the page)
In that case you're better off using a server side script to fetch and cache the script file. Depending on your server setup you could just wget the file (periodically via cron if you expect it to change) or do something similar with a small script inthe language of your choice.
if you want the contents of the src attribute, you would have to do an ajax request and look at the responsetext. If you where to have the js between and you could access it through innerHTML.
This might be of interest: http://ejohn.org/blog/degrading-script-tags/
I had a same issue, so i solve it this way:
The js file contains something like
window.someVarForReturn = `content for return`
On html
<script src="file.js"></script>
<script>console.log(someVarForReturn)</script>
In my case the content was html template. So i did something like this:
On js file
window.someVarForReturn = `<did>My template</div>`
On html
<script src="file.js"></script>
<script>
new DOMParser().parseFromString(someVarForReturn, 'text/html').body.children[0]
</script>
You cannot directly get what browser loaded as the content of your specific script tag (security hazard);
But
you can request the same resource (src) again ( which will succeed immediately due to cache ) and read it's text:
const scriptSrc = document.querySelector('script#yours').src;
// re-request the same location
const scriptContent = await fetch(scriptSrc).then((res) => res.text());
If you're looking to access the attributes of the <script> tag rather than the contents of script.js, then XPath may well be what you're after.
It will allow you to get each of the script attributes.
If it's the example.js file contents you're after, then you can fire off an AJAX request to fetch it.
It's funny but we can't, we have to fetch them again over the internet.
Likely the browser will read his cache, but a ping is still sent to verify the content-length.
[...document.scripts].forEach((script) => {
fetch(script.src)
.then((response) => response.text() )
.then((source) => console.log(source) )
})
Using 2008-style DOM-binding it would rather be:
document.getElementById('myscript').getAttribute("src");
document.getElementById('myscript').getAttribute("type");
You want to use the innerHTML property to get the contents of the script tag:
document.getElementById("myscript").innerHTML
But as #olle said in another answer you probably want to have a read of:
http://ejohn.org/blog/degrading-script-tags/
If a src attribute is provided, user agents are required to ignore the content of the element, if you need to access it from the external script, then you are probably doing something wrong.
Update: I see you've added a comment to the effect that you want to cache the script and use it later. To what end? Assuming your HTTP is cache friendly, then your caching needs are likely taken care of by the browser already.
I'd suggest the answer to this question is using the "innerHTML" property of the DOM element. Certainly, if the script has loaded, you do not need to make an Ajax call to get it.
So Sugendran should be correct (not sure why he was voted down without explanation).
var scriptContent = document.getElementById("myscript").innerHTML;
The innerHTML property of the script element should give you the scripts content as a string provided the script element is:
an inline script, or
that the script has loaded (if using the src attribute)
olle also gives the answer, but I think it got 'muddled' by his suggesting it needs to be loaded through ajax first, and i think he meant "inline" instead of between.
if you where to have the js between and you could access it through innerHTML.
Regarding the usefulness of this technique:
I've looked to use this technique for client side error logging (of javascript exceptions) after getting "undefined variables" which aren't contained within my own scripts (such as badly injected scripts from toolbars or extensions) - so I don't think it's such a way out idea.
Not sure why you would need to do this?
Another way round would be to hold the script in a hidden element somewhere and use Eval to run it. You could then query the objects innerHtml property.
I am working on a Chrome Extension that works mainly within a pop-up.
I would like the user to enter some text (a string) into an input field in the pop-up, and this string will serve as a "variable" in a script I would like to inject and run on a specific page.
I have tried achieving this by making a content script that will execute the script, using the following well documented way:
var s = document.createElement('script');
s.src = chrome.runtime.getURL('pageSearch.js');
s.onload = function() {
this.parentNode.removeChild(this);
};
(document.head||document.documentElement).appendChild(s);
Basically, I would like to pass the user's input all the way to the code in pageScript.js before executing the script on the page.
What would be the best way to approach this? I will not be getting any information back to the extension.
Thanks.
To pass a variable from the popup to the dynamically inserted content script, see Pass a parameter to a content script injected using chrome.tabs.executeScript().
After getting a variable in the content script, there are plenty of ways to get the variable to the script in the page.
E.g. by setting attributes on the script tag, and accessing this <script> tag using document.currentScript. Note: document.currentScript only refers to the script tag right after inserting the tag in the document. If you want to refer to the original script tag later (e.g. within a timer or an event handler), you have to save a reference to the script tag in a local variable.
Content script:
var s = document.createElement('script');
s.dataset.variable = 'some string variable';
s.dataset.not_a_string = JSON.stringify({some: 'object'});
s.src = chrome.runtime.getURL('pageSearch.js');
s.onload = function() {
this.remove();
};
(document.head||document.documentElement).appendChild(s);
pageSearch.js:
(function() {
var variable = document.currentScript.dataset.variable;
var not_a_string = JSON.parse(document.currentScript.dataset.not_a_string);
// TODO: Use variable or not_a_string.
})();
Suppose I'm embedding a javascript in HTML page:
<script type="text/javascript" src="www.mydomain.com/script.js?var1=abc&var2=def"></script>
Is there a way I can get the src url inside the script and extract the params?
Given that you are using a regular script element in the HTML source, you can just get the last script element in the document. Since script elements are (in the absence of attributes that you aren't using in your example) blocking, no more will be added to the document until this one has been executed.
var scripts = document.getElementsByTagName('script');
var last_script = scripts[scripts.length - 1];
var url = script.src;
This won't work if you dynamically add a script element before the last script using DOM.
this little hack uses error handling to find the location of external scripts from within:
(function(){ // script filename setter, leaves window.__filename set with active script URL.
if(self.attachEvent){
function fn(e,u){self.__filename=u;}
attachEvent("onerror",fn);
setTimeout(function(){detachEvent("onerror", fn)},20);
eval("gehjkrgh3489c()");
}else{
Object.defineProperty( window, "__filename", { configurable: true, get:function __filename(){
try{document.s0m3741ng()}catch(y){
return "http://" +
String(y.fileName || y.file || y.stack || y + '')
.split(/:\d+:\d+/)[0].split("http://")[1];
}
}})//end __filename
}//end if old IE?
}());
it sets a global "__filename" property when run, so atop an external script, the __filename is in effect for the execution of the whole script.
i strongly prefer to sniff url parts from scr attributes, but this works in most browsers and without knowing the URL ahead of time.
I don't think there is a property already inside the script that points to this url.
From the script, you can read the DOM. So you can lookup the script tag and inspect its src attribute, but if you got multiple scripts (or the DOM was modified), you cannot really know for sure which one it is.
I assume it is for checking input. So to solve this, you can eiter:
Render the script through a server side script (PHP), and let it output variables. Disadvantage: eats more server resources and makes caching a bitch.
Just get parameter from all the scripts loading from your domain. Maybe it doesn't matter much, or you have only one script anyway. Disadvantage: In this case this is possible, but not very reliable and resistant to changes.
My preferred: Add the variables to the script tag (actually, to another script tag) to make them available directly in Javascript, rather than parsing the script url.
Like this:
<script type="text/javascript">
var1 = 'abc';
var2 = 'def';
</script>
<script type="text/javascript" src="www.mydomain.com/script.js"></script>
Here are two other solutions that will work no matter how the script is loaded (even if they are loaded dynamically or with async or defer attributes):
Put an id on the script tag.
<script id="myscript" type="text/javascript" src="www.mydomain.com/script.js?var1=abc&var2=def"></script>
Then, you can find it with the id:
$("#myscript").attr("src")
Or second, if you know the filename, you can search for any script tag that contains that filename:
function findScriptTagByFilename(fname) {
$("script").each(function() {
if (this.src.indexOf(fname) !== -1) {
return this.src;
}
});
}
var url = findScriptTagByFilename("/script.js");