I have my UI's split up in 2 javascript files. If the URL is of certain patter lets say /test1 then I want script1 to execute or in other words, I want script1 to be added as <include> so the UI renders according to script1 else I want script2 to be added for /test2.
There is no button that triggers these URLs. Its when the page loads -detect URL and load script accordingly.
How can I achieve this?
you can dynamically insert javascript file.
<script type="application/javascript">
function loadJS(file) {
// DOM: Create the script element
var jsElm = document.createElement("script");
// set the type attribute
jsElm.type = "application/javascript";
// make the script element load file
jsElm.src = file;
// finally insert the element to the body element in order to load the script
document.body.appendChild(jsElm);
}
if(type === "test1")
loadJS('file1.js')
else
loadJS('file2.js');
</script>
using jquery and javascript:
$(document).ready(function(){
var url=location.href//get the page url
var scriptUrl
if(url.indexOf('something')>0){//check for specific string in url
scriptUrl='/script1.js'
}
else{
scriptUrl='/script2.js'
}
var script = document.createElement( 'script' );//create script element
script.type = 'text/javascript';
script.src = scriptUrl;
$("head").append( script );//append newly created script element to head
})
Query String Examples:
?page=test1
?page=test2
Following code will check the value of page and then load the appropriate Script:
$(document).ready(function () {
var page = $.getUrlVar("page");
var scriptToRun = null;
switch (page) {
case "test1":
scriptToRun = "script1.js";
break;
case "test2":
scriptToRun = "script2.js";
break;
}
// Create Script Tag
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = scriptToRun;
$("head").append(script);
});
Be sure to add the following Extension before your $(document).ready code:
$.extend({
getUrlVars: function(){
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.length; i++) {
hash = hashes[i].split('=');
vars.push(hash[0]);
vars[hash[0]] = hash[1];
}
return vars;
},
getUrlVar: function(name){
return $.getUrlVars()[name];
}
});
(This jQuery Extension is not my Code).
Related
I am trying to inject a script on page load in head wherein I have to give the page name inside script.
Below is how I am implementing it in my ts file.
**var head = document.getElementsByTagName('head')[0];
var tag = document.createElement("script");
tag.type = 'text/javascript';
tag.innerHTML = "var DDO = {} DDO.pageData = {'pageName': " + pageUrl + "} ";
head.appendChild(tag);**
The script is getting injected however an error is being thrown in the console tab.
ERROR: VM3741:1 Uncaught SyntaxError: Unexpected identifier at appendChild
Try this
var head = document.getElementsByTagName('head')[0],pageUrl="somevalue";
var tag = document.createElement("script");
tag.type = 'text/javascript';
tag.textContent = "var DDO = {}; DDO.pageData = {'pageName': '" + pageUrl + "'} ";
head.appendChild(tag);
To remove previous script element
var script = head.childNodes[0]; //get previous script element
head.removeChild(script); //removing script
you have not provided single quotes for the value of the key pageName
tag.innerHTML = "var DDO = {}; DDO.pageData = {'pageName': " + pageUrl + "} ";
semicolon missing after defining the variable DDO,
and also from where are you injecting in pageUrl, make sure variable is defined.
try having script in external file and injecting in script tag with refrence to that file in case some error in script defined in inner html
document.head, document.body to attach scripts
Correct Answer:
var head = document.getElementsByTagName('head')[0];
var tag = document.createElement('script');
tag.type = 'text/javascript';
tag.id = 'adobedatalayer';
tag.textContent = 'var DDO = {}; DDO.pageData =' + JSON.stringify(pageinfo);
var script = document.getElementById('adobedatalayer');
if (script != null) {
head.removeChild(script);
}
head.appendChild(tag);
I have a problem when trying to use a widget.
The script is as follows:
<script type="text/javascript">
baseUrl = "https://widgets.cryptocompare.com/";
var scripts = document.getElementsByTagName("script");
var embedder = scripts[ scripts.length - 1 ];
(function (){
var appName = encodeURIComponent(window.location.hostname);
if(appName==""){appName="local";}
var s = document.createElement("script");
s.type = "text/javascript";
s.async = true;
var theUrl = baseUrl+'serve/v3/coin/chart?fsym=TPAY*&tsyms=USD';
s.src = theUrl + ( theUrl.indexOf("?") >= 0 ? "&" : "?") + "app=" + appName;
embedder.parentNode.appendChild(s);
})();
</script>
When I access https://widgets.cryptocompare.com/serve/v3/coin/chart?fsym=TPAY*&tsyms=USD from my browser it displays all the data but when using the widget script it does not seem to like the fsym=TPAY&tsym=USD but because cryptocompare lists some currencies that have the same ticker they add a * to the second currency which uses the same ticker name.
Another example of this is PHORE PHR* as they have PHREAK PHR already listed. Funny enough the currencies I would like to use it TPAY* and PHR*.
In my content script, I am using this approach to be able to access web page's variables:
function exec(fn) {
var script = document.createElement('script');
script.setAttribute("type", "application/javascript");
script.textContent = '(' + fn + ')();';
document.body.appendChild(script); //run the script
document.body.removeChild(script); //clean up
}
exec( function(){
var test = websiteVar
chrome.runtime.sendMessage("extensionID", {test: test}, function(response) {
});
});
Where it says extensionID, if I hardcode it, it works. However, I can't use chrome.runtime.id as it is injected in the page. I think I read they don't work in the same context.
Is there a way to get the extension id programatically?
Example of what wOxxOm said above:
function exec(fn) {
var script = document.createElement('script');
script.setAttribute("type", "application/javascript");
script.textContent = '(' + fn + ')("' + chrome.runtime.id +'")';
document.body.appendChild(script); //run the script
document.body.removeChild(script); //clean up
}
exec( function(extensionID){
var test = websiteVar;
chrome.runtime.sendMessage(extensionID, {test: test}, function(response) {
});
});
Im tying to replace a Java script include using Greasemonkey, but I'm afraid it will break quickly because it is not dynamic. Here and example of my situation.
This is the include statement from the original site:
<script src="/asset/js/app.js?dc12383"></script>
The ending ?dc12383 is what I assume to be some type of version number.
I currently replace the js using the code:
function createScript(js, id) {
var s = document.createElement('script');
if (id) s.id = id;
s.type = 'text/javascript';
try { s.innerHTML = js; }
catch(e) { s.innerText = js; }
return s;
}
function replaceJs() {
var js = {
"asset/js/app.js?dc12383": ' *STUFF TO REPLACE*'
};
for (var i in js) {
document.body.appendChild(createScript(js[i], i));
}
}`
Any ideas on how to ignore that ending ?..... in the include?
//this function is the callback, it needs to be a global variable
window.readResponse = function (response){
document.getElementsByTagName('SPAN')[0].innerHTML = response;
}
(function(){
//note the "readResponse" at the end
$URL = "http://www.google.com/"
var src = 'http://cdn.api.twitter.com/1/urls/count.json?url=' + $URL + '&callback=readResponse',
script = document.createElement('SCRIPT');
script.src = src;
document.body.appendChild(script);
})();
That above is my codes to get the shares count. But when I do the request, the response I am getting is
function (){ //note the "readResponse" at the end $URL = "http://www.google.com/" var src = 'http://cdn.api.twitter.com/1/urls/count.json?url=' + $URL + '&callback=readResponse', script = document.createElement('SCRIPT'); script.src = src; document.body.appendChild(script); }
Where as I am expecting the response.count is the actual share count.
I setup a demo here http://jsfiddle.net/zs1dgs45/5/
Any help would be appreciated
Twitter have stopped supporting the share count API. Sorry.