Get the iframe value - javascript

I have an iframe that I append User-written HTML, CSS, and JS code.
I can compile the code and return errors, but how can I get the actual result of the run?
for example, if the user-written code is BLAH it will return BLAH. so how can i get it?
I tried using this function:
var myIFrame = document.getElementById("test");
var content = myIFrame.contentWindow.document.body.innerHTML;
But it returns the tag.
The iframe is not cross-domain btw.
Code:
Iframe:
<div class="code-result">
<iframe class="result" id="test" frameborder="0"></iframe>
<div class="console"></div>
</div>
Js:
window.addEventListener('load',function() {
$(document).ready(
function (){
$('.compile').click(function () {
var myIFrame = document.getElementById("test");
var content = myIFrame.contentWindow.document.body.innerHTML;
html_result = content.substring(content.indexOf(0),content.indexOf('<script>'));
if (html_result == 'ds') {
alert('True!')
}
else {
alert('Try again.')
}
})
}
)
})

Related

Alternate / Equivalent of jQuery.load in pure JavaScript? [duplicate]

I want home.html to load in <div id="content">.
<div id="topBar"> HOME </div>
<div id ="content"> </div>
<script>
function load_home(){
document.getElementById("content").innerHTML='<object type="type/html" data="home.html" ></object>';
}
</script>
This works fine when I use Firefox. When I use Google Chrome, it asks for plug-in. How do I get it working in Google Chrome?
I finally found the answer to my problem. The solution is
function load_home() {
document.getElementById("content").innerHTML='<object type="text/html" data="home.html" ></object>';
}
Fetch API
function load_home (e) {
(e || window.event).preventDefault();
fetch("http://www.yoursite.com/home.html" /*, options */)
.then((response) => response.text())
.then((html) => {
document.getElementById("content").innerHTML = html;
})
.catch((error) => {
console.warn(error);
});
}
XHR API
function load_home (e) {
(e || window.event).preventDefault();
var con = document.getElementById('content')
, xhr = new XMLHttpRequest();
xhr.onreadystatechange = function (e) {
if (xhr.readyState == 4 && xhr.status == 200) {
con.innerHTML = xhr.responseText;
}
}
xhr.open("GET", "http://www.yoursite.com/home.html", true);
xhr.setRequestHeader('Content-type', 'text/html');
xhr.send();
}
based on your constraints you should use ajax and make sure that your javascript is loaded before the markup that calls the load_home() function
Reference - davidwalsh
MDN - Using Fetch
JSFIDDLE demo
You can use the jQuery load function:
<div id="topBar">
HOME
</div>
<div id ="content">
</div>
<script>
$(document).ready( function() {
$("#load_home").on("click", function() {
$("#content").load("content.html");
});
});
</script>
Sorry. Edited for the on click instead of on load.
Fetching HTML the modern Javascript way
This approach makes use of modern Javascript features like async/await and the fetch API. It downloads HTML as text and then feeds it to the innerHTML of your container element.
/**
* #param {String} url - address for the HTML to fetch
* #return {String} the resulting HTML string fragment
*/
async function fetchHtmlAsText(url) {
return await (await fetch(url)).text();
}
// this is your `load_home() function`
async function loadHome() {
const contentDiv = document.getElementById("content");
contentDiv.innerHTML = await fetchHtmlAsText("home.html");
}
The await (await fetch(url)).text() may seem a bit tricky, but it's easy to explain. It has two asynchronous steps and you could rewrite that function like this:
async function fetchHtmlAsText(url) {
const response = await fetch(url);
return await response.text();
}
See the fetch API documentation for more details.
I saw this and thought it looked quite nice so I ran some tests on it.
It may seem like a clean approach, but in terms of performance it is lagging by 50% compared by the time it took to load a page with jQuery load function or using the vanilla javascript approach of XMLHttpRequest which were roughly similar to each other.
I imagine this is because under the hood it gets the page in the exact same fashion but it also has to deal with constructing a whole new HTMLElement object as well.
In summary I suggest using jQuery. The syntax is about as easy to use as it can be and it has a nicely structured call back for you to use. It is also relatively fast. The vanilla approach may be faster by an unnoticeable few milliseconds, but the syntax is confusing. I would only use this in an environment where I didn't have access to jQuery.
Here is the code I used to test - it is fairly rudimentary but the times came back very consistent across multiple tries so I would say precise to around +- 5ms in each case. Tests were run in Chrome from my own home server:
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
</head>
<body>
<div id="content"></div>
<script>
/**
* Test harness to find out the best method for dynamically loading a
* html page into your app.
*/
var test_times = {};
var test_page = 'testpage.htm';
var content_div = document.getElementById('content');
// TEST 1 = use jQuery to load in testpage.htm and time it.
/*
function test_()
{
var start = new Date().getTime();
$(content_div).load(test_page, function() {
alert(new Date().getTime() - start);
});
}
// 1044
*/
// TEST 2 = use <object> to load in testpage.htm and time it.
/*
function test_()
{
start = new Date().getTime();
content_div.innerHTML = '<object type="text/html" data="' + test_page +
'" onload="alert(new Date().getTime() - start)"></object>'
}
//1579
*/
// TEST 3 = use httpObject to load in testpage.htm and time it.
function test_()
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
{
content_div.innerHTML = xmlHttp.responseText;
alert(new Date().getTime() - start);
}
};
start = new Date().getTime();
xmlHttp.open("GET", test_page, true); // true for asynchronous
xmlHttp.send(null);
// 1039
}
// Main - run tests
test_();
</script>
</body>
</html>
try
async function load_home(){
content.innerHTML = await (await fetch('home.html')).text();
}
async function load_home() {
let url = 'https://kamil-kielczewski.github.io/fractals/mandelbulb.html'
content.innerHTML = await (await fetch(url)).text();
}
<div id="topBar"> HOME </div>
<div id="content"> </div>
When using
$("#content").load("content.html");
Then remember that you can not "debug" in chrome locally, because XMLHttpRequest cannot load -- This does NOT mean that it does not work, it just means that you need to test your code on same domain aka. your server
You can use the jQuery :
$("#topBar").on("click",function(){
$("#content").load("content.html");
});
$("button").click(function() {
$("#target_div").load("requesting_page_url.html");
});
or
document.getElementById("target_div").innerHTML='<object type="text/html" data="requesting_page_url.html"></object>';
<script>
var insertHtml = function (selector, argHtml) {
$(document).ready(function(){
$(selector).load(argHtml);
});
var targetElem = document.querySelector(selector);
targetElem.innerHTML = html;
};
var sliderHtml="snippets/slider.html";//url of slider html
var items="snippets/menuItems.html";
insertHtml("#main",sliderHtml);
insertHtml("#main2",items);
</script>
this one worked for me when I tried to add a snippet of HTML to my main.html.
Please don't forget to add ajax in your code
pass class or id as a selector and the link to the HTML snippet as argHtml
There is this plugin on github that load content into an element. Here is the repo
https://github.com/abdi0987/ViaJS
load html form a remote page ( where we have CORS access )
parse the result-html for a specific portion of the page
insert that part of the page in a div on current-page
//load page via jquery-ajax
$.ajax({
url: "https://stackoverflow.com/questions/17636528/how-do-i-load-an-html-page-in-a-div-using-javascript",
context: document.body
}).done(function(data) {
//the previous request fails beceaus we dont have CORS on this url.... just for illlustration...
//get a list of DOM-Nodes
var dom_nodes = $($.parseHTML(data));
//find the question-header
var content = dom_nodes.find('#question-header');
//create a new div and set the question-header as it's content
var newEl = document.createElement("div");
$(newEl).html(content.html());
//on our page, insert it in div with id 'inserthere'
$("[id$='inserthere']").append(newEl);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>part-result from other page:</p>
<div id="inserthere"></div>
Use this simple code
<div w3-include-HTML="content.html"></div>
<script>w3.includeHTML();</script>
</body>```
This is usually needed when you want to include header.php or whatever page.
In Javascript it's easy especially if you have HTML page and don't want to use php include function but at all you should write php function and add it as Javascript function in script tag.
In this case you should write it without function followed by name Just. Script rage the function word and start the include header.php
i.e convert the php include function to Javascript function in script tag and place all your content in that included file.
I use jquery, I found it easier
$(function() {
$("#navigation").load("navbar.html");
});
in a separate file and then load javascript file on html page
showhide.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function showHide(switchTextDiv, showHideDiv)
{
var std = document.getElementById(switchTextDiv);
var shd = document.getElementById(showHideDiv);
if (shd.style.display == "block")
{
shd.style.display = "none";
std.innerHTML = "<span style=\"display: block; background-color: yellow\">Show</span>";
}
else
{
if (shd.innerHTML.length <= 0)
{
shd.innerHTML = "<object width=\"100%\" height=\"100%\" type=\"text/html\" data=\"showhide_embedded.html\"></object>";
}
shd.style.display = "block";
std.innerHTML = "<span style=\"display: block; background-color: yellow\">Hide</span>";
}
}
</script>
</head>
<body>
<a id="switchTextDiv1" href="javascript:showHide('switchTextDiv1', 'showHideDiv1')">
<span style="display: block; background-color: yellow">Show</span>
</a>
<div id="showHideDiv1" style="display: none; width: 100%; height: 300px"></div>
</body>
</html>
showhide_embedded.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function load()
{
var ts = document.getElementById("theString");
ts.scrollIntoView(true);
}
</script>
</head>
<body onload="load()">
<pre>
some text 1
some text 2
some text 3
some text 4
some text 5
<span id="theString" style="background-color: yellow">some text 6 highlight</span>
some text 7
some text 8
some text 9
</pre>
</body>
</html>
If your html file resides locally then go for iframe instead of the tag. tags do not work cross-browser, and are mostly used for Flash
For ex : <iframe src="home.html" width="100" height="100"/>

cross domain image url in container to iframe input value

I have an iframe that I have control of posted into the container on a different domain.
I want to grab an image url in the parent container and insert it into aninput value in the iframe.
Here's my javascript code in the iframe:
<script>
function displayMessage (evt) {
var message;
if (evt.origin !== "https://container-url.com") {
message = "You are not worthy";
} else {
message = "testing";
}
document.getElementsByClassName('text')[2].setAttribute("value", message);
}
if (window.addEventListener) {
// For standards-compliant web browsers
window.addEventListener("message", displayMessage, false);
} else {
window.attachEvent("onmessage", displayMessage);
}
</script>
Here's my javascript in the <head> of the container:
<script>
window.onload = function () {
var iframeWin = document.getElementById("da-iframe").contentWindow,
myMessage = document.getElementsByClassName('portfolio_item_image wp-post-image')[0].src;
window.document.onload = function () {
iframeWin.postMessage(myMessage, "https://iframe-url.com");
return false;
};
};
</script>
Im trying to take the url of an image in the container that looks like this:
<img width="2000" height="1383" src="https://example.com/12.jpg," class="portfolio_item_image wp-post-image" alt="" srcset="https://example.com/123.jpg, https://example.com/1234.jpg," sizes="(max-width: 2000px) 100vw, 2000px">
and insert it into the value of an input in theiframe that looks like this:
<input type="text" name="505" id="505" value="" class="text" size="30" maxlength="65535">
I'm not getting any errors. I just cannot figure out what I'm doing wrong.

element is getting variable without declared

I am having a JavaScript code that is having a value in #message but i have not defined anywhere.
Does $("#message").html(result); is something inbuilt in Javascript?
I apologize if it is very basic and stupid question.
It is linked to my another question "
https://stackoverflow.com/questions/41745209/save-javascript-value-when-converting-speech-to-text-via-webkitspeechrecognition#
Complete Code
<!DOCTYPE html>
<html>
<head>
<script src="Content/SpeechScript.js"></script>
<title>Login Screen</title>
<meta charset="utf-8" />
</head>
<body >
<div id="results">
<span id="final_span" class="final"></span>
<span id="interim_span" class="interim"></span>
</div>
<script type="text/javascript">
function Typer(callback) {
speak('Welcome ,Please Speak your CPR Number');
var srcText = 'WelcomeToDanske,PleaseSpeakyourCPR Numberwhat';
var i = 0;
debugger;
var result = srcText[i];
var interval = setInterval(function () {
if (i == srcText.length - 1) {
clearInterval(interval);
callback();
return;
}
i++;
result += srcText[i].replace("\n", "<br />");
$("#message").html(result);
debugger;
document.getElementById('user').innerHTML = result;
// var parent = document.getElementById('parentDiv');
// var text = document.createTextNode('the text');
// var child = document.getElementById('parent');
// child.parentNode.insertBefore(text, child);
// var div = document.getElementById('childDiv');
//var parent = document.getElementById('parentDiv');
//var sibling = document.getElementById('childDiv');
////var text = document.createTextNode('new text');
// //parent.insertBefore(result, sibling);
},
100);
return true;
}
function playBGM() {
startDictation(event);
}
Typer(function () {
playBGM();
});
// say a message
function speak(text, callback) {
var u = new SpeechSynthesisUtterance();
u.text = text;
u.lang = 'en-US';
u.onend = function () {
if (callback) {
callback();
}
};
u.onerror = function (e) {
if (callback) {
callback(e);
}
};
speechSynthesis.speak(u);
}
</script>
</div>
<div id="clockDisplay">
<span id="id1">Welcome:</span>
<table width="100%" border="1"><tr><td width="50%"> Username : </td><td><div id="message"></div></td></tr></table>
</body>
</html>
$("#message").html(result); is something inbuilt in Javascript?
No.
$ is a variable that is no part of the JavaScript spec, nor is it part of the common extensions to JS provided by browsers in webpages. It is commonly used by libraries such as PrototypeJS and jQuery. This particular case looks like jQuery, but you aren't including that library in your page.
Fist off, remember to include jQuery as script in your html document or $ will not be defined.
#message Refers to an element in your html document with the tag of id="message"
To get an element in jQuery, by id, you use this syntax: var Element = $("#ID");
So, to make sure your code works, ensure that both there is an element with the ID message, and a defined variable named result containing the html text to put into your element.
Since you want to append to <div id="clockDisplay"> <span id="user">Username :</span></div>, why not change it to:
<div id="clockDisplay">
<span id="user">Username :</span>
<div id="message"></div>
</div>

Use JavaScript variable as iframe src?

I'm trying to use a JavaScript variable as the src in a <iframe>, the user will then be able to load other content by choosing scr in a menu, which changes the variable. the default src URL is apps/start.php.
Here some code from my index.php:
<script>
var appurl = "start.php";
document.getElementById("app").src = "apps/" + appurl();
</script>
<iframe id="app" src="">
</iframe>
The problem is that i can't get this first small part working... The <script> tag is in the <head>. And when the src is changing will the new document automatically load?
Wait for the page to load (note that this is only going to work when the iframe is on your domain)
window.onload = function(){
var appurl = "start.php";
document.getElementById("app").src = "apps/" + appurl;
};
The problem is that the Javascript is run before the iframe is there. Put your javascript below your iFrame or inside the document ready and it will work.
Example document onload:
<script>
window.onload = function ()
{
var appurl = "start.php";
document.getElementById("app").src = "apps/" + appurl();
}
</script>
<iframe id="app" src="">
</iframe>
<script>
window.onload = function ()
{
var appurl = "start.php";
document.getElementById("app").src = "apps/" + appurl;
}
</script>
<iframe id="app" src="">
</iframe>
Try
<script>
window.onload = function(){
var appurl = 'start.php';
document.getElementById("app").src = "apps/" + appurl;
};
</script>

how to insert javascript code via jquery?

<div id="example">
</div>
<script type="text/javascript">
function insert() {
var data = '<script type="text/javascript"> function test() { a = 5; }<\/script>';
$("#example").append(data);
}
function get() {
var content = $("#example").html();
alert(content);
}
</script>
INSERT
GET
</body>
</html>
what i want to do:
when i click on insert, i want to insert this code into example div:
<script type="text/javascript"> function test() { a = 5; }<\/script>
when i click on get, i want to get that code, which i inserted there.
but when i click on insert, and then on get, there's no code.. where is problem ? thanks
According to your comment to Adam Bellaire, you want the script tag to display as normal text. What you are looking to do is encode the text with HTML entities, this will prevent the browser from processing it as normal HTML.
var enc = $('<div/>').text('<script type="text/javascript"> function test() { a = 5; }<\/script>').html();
$("#example").append(enc);
This works:
function insert() {
var data = '<script type="text/javascript"> function test() { a = 5; }<\/script>';
$('#example').text(data);
}
function get() {
var content = $('#example').text();
alert(content);
}
Are you checking for the code by browsing the live version of the DOM, using a tool like Firebug? If you are expecting to see your code rendered in your regular browser window, you won't, because the script tags are actually parsed when they are inserted, and script tags aren't visible elements in an HTML page.

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