I am trying to set the attribute of the script tag for a infomous word cloud as follows:
<head>
function getParameterByName(name)
{
...
}
</head>
<body>
<script type="text/javascript"
async data-infomous-id="javascript:getParameterByName('wcid');"
id="embed"
src="http://www.infomous.com/client2/?width=800&height=600&maxWords=40">
</script>
</body>
But the javascript function is never executed. How can I set the data-infomous-id dynamically?
This should do this trick:
jsFiddle
var elem = document.getElementById('embed');
elem.setAttribute('data-infomous-id', getParameterByName('wcid'));
Related
With this HTML the function myFunc() can be executed. https://myurl.de/myjs.js has the function myFunc in it.
<head>
<script type="text/javascript" src="https://myurl.de/myjs.js"></script>
<body>
<script type="text/javascript">
myFunc();
</script>
</body>
</head>
But with the second HTML I get an Error: Uncaught ReferenceError: myFunc is not defined.
https://myurl.de/settingsFile.js is a file that includes this url in a var: https://myurl.de/myjs.js so basically SettingsFile.UrlToMyJS is this https://myurl.de/myjs.js
<head>
<script src="https://myurl.de/settingsFile.js"></script>
<script type="text/javascript" id="myid"></script>
</head>
<body>
<script type="text/javascript">
document.getElementById('myid').src = SettingsFile.UrlToMyJS;
myFunc();
</script>
</body>
When I console.log(document.getElementById('myid')) this is the output:
<script type="text/javascript" id="myid" src="https://myurl.de/myjs.js></script> which is correct. It looks exactly like the script in the head of the first html (with the difference that it has the id="myid").
Yet it does not work. Why and how can I fix it?
settingsFile.js:
var defaultURL = 'https://myurl.de/';
var SettingsFile = {
UrlToMyJS : defaultURL + 'myjs.js',
}
The reason it's not working is that you can't add a src to a script element that's already in the DOM — or rather, doing so doesn't do anything. The script element has already been processed.
Instead, create it and then append it:
var script = document.createElement("script");
script.onload = function() {
myFunc();
};
script.src = SettingsFile.UrlToMyJS;
document.head.appendChild(script);
// If you need to support IE8, use the following instead of the previous line:
//document.getElementsByTagName("head")[0].appendChild(script);
That waits for the script to load, then calls myFunc (which should exist by then).
Also note that as I and Jeremy pointed out in the comments, body doesn't go in head, it goes after. It's also generally best to put script tags at the end of body (if you're not using async or defer attributes on them or type="module"). So in all, something like:
<head>
<!-- head stuff here -->
</head>
<body>
<!-- content here -->
<script src="https://myurl.de/settingsFile.js"></script>
<script type="text/javascript">
var script = document.createElement("script");
script.onload = function() {
myFunc();
};
script.src = SettingsFile.UrlToMyJS;
document.head.appendChild(script);
// If you need to support IE8, use the following instead of the previous line:
//document.getElementsByTagName("head")[0].appendChild(script);
</script>
</body>
Another option is to use document.write. This sort of thing may be the last at-least-partially appropriate use of document.write during the main parsing of the page:
<head>
<!-- head stuff here -->
</head>
<body>
<!-- content here -->
<script src="https://myurl.de/settingsFile.js"></script>
<script type="text/javascript">
document.write('<script src="' + SettingsFile.UrlToMyJS + '"><\/script>');
</script>
<script>
myFunc();
</script>
</body>
You can try creating a element and then appending it to your title
For Example (script code) :
var script = document.createElement("script");
script.src = "YOUR_SCRIPT_SRC_HERE";
document.getElementsByTagName('head')[0].appendChild(script);
Here I am creating a new tag in html and then appending it to the head of your html. Even as T.J. Crowder mentioned in the comment try removing your body from the head
I rarely have to do any Javascript and I seem to fail doing the easiest tasks. I am trying to replace a string in two divs. The first div gets replaced, the second one is not found with the error message:
drawings.html:20 Uncaught TypeError: Cannot set property 'innerHTML' of null
However I tried the usual remedies of putting my code in an 'onload' function and putting the script at the end of the body tag. What else could possibly go wrong?
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="cell1">test<div>
<div id="cell2">test<div>
<script>
window.onload = function() {
replace();
}
function replace() {
console.log("replace");
document.getElementById("cell1").innerHTML = "cell1";
document.getElementById("cell2").innerHTML = "cell2";
}
</script>
</body>
</html>
just close your divs elements.
<html>
<head>
</head>
<body>
<div id="cell1">test</div>
<div id="cell2">test</div>
<script>
window.onload = function() {
replace();
}
function replace() {
console.log("replace");
document.getElementById("cell1").innerHTML = "cell1";
document.getElementById("cell2").innerHTML = "cell2";
}
</script>
</body>
</html>
Hi I am trying to call the namespace JavaScript which is given in the internal JavaScript in below HTML representation.
<head>
<script type="text/javascript">
var ns = {
sampleAlert : function() {
ns.message(var );
}
message :function(var ) {
alert('msg');
}
}
</script>
</head>
<body>
<!--how to call the function sampleAlert-->
</body>
Is that possible? I am not able to call that namespace JavaScript function in the body.
Call it like this:
ns.sampleAlert();
Read this link to have more understanding on JavaScript Namespace
You probably need to do something like the following.
<head>
<script type="text/javascript">
var ns = {
sampleAlert : function(messageText) {
ns.message(messageText);
},
message : function(text) {
alert('msg ' + text);
}
}
</script>
</head>
<body>
<!--how to call the function sampleAlert-->
<script type="text/javascript">
ns.sampleAlert("this text will be displayed in the alert");
</script>
</body>
I want to do display time-changing data on a web page. I use the JQuery framework. I use the following code as a test : display a different random number each second. It does not work. Why ? What is a correct, working way ?
<html>
<head>
<title>test</title>
<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
function refreshRandomNumber() {
var lHtmlBlob = "<p> random = " + Math.random() + "</p>";
$('#random_number').html(lHtmlBlob);
}
setInterval(refreshRandomNumber(), 1000);
});
</script>
</head>
<body>
<div id="random_number"></div>
</body>
</html>
You need to pass setInterval just the function referenced by refreshRandomNumber and not the return value of that function what you do by using refreshRandomNumber(). So try this:
setInterval(refreshRandomNumber, 1000);
Small difference. instead of:
setInterval(refreshRandomNumber(), 1000);
use:
setInterval(refreshRandomNumber, 1000);
That passes the function rather than the function return value.
I am trying to figure out the location of the script tag the current javascript is running in. What is really going on is that I need to determine from inside a src'd, dynamically inserted javascript file where it is located in the DOM. These are dynamically generated tags; code snippet:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>where am i?</title>
<script type="text/javascript" charset="utf-8">
function byId(id) {
return document.getElementById(id);
}
function create_script(el, code) {
var script = document.createElement("script");
script.type = "text/javascript";
script.text = code;
el.appendChild(script);
}
</script>
</head>
<body>
<div id="find_me_please"></div>
<script>
create_script(byId("find_me_please"), "alert('where is this code located?');");
</script>
</body>
</html>
You could give the script an id tag, like this dude does...
You can use document.write to create a dummy DOM object and use parentNode to escape out. For example:
<script>
(function(r) {
document.write('<span id="'+r+'"></span>');
window.setTimeout(function() {
var here_i_am = document.getElementById(r).parentNode;
... continue processing here ...
});
})('id_' + (Math.random()+'').replace('.','_'));
</script>
This assumes you don't actually have control of the <script> tag itself, such as when it's inside a <script src="where_am_i.js"></script> - if you do have control of the <script> tag, simply put an ID on it, as in:
<script id="here_i_am">...</script>
If you are just running this on page load, this works
<script>
var allScripts = document.getElementsByTagName('script');
var thisScript = allScripts[allScripts.length];
alert(thisScript);
</script>