Replacing DIV content based on variable sent from another HTML file - javascript

I'm trying to get this JavaScript working:
I have an HTML email which links to this page which contains a variable in the link (index.html?content=email1). The JavaScript should replace the DIV content depending on what the variable for 'content' is.
<!-- ORIGINAL DIV -->
<div id="Email">
</div>
<!-- DIV replacement function -->
<script type="text/javascript">
function ReplaceContentInContainer(id,content) {
var container = document.getElementById(id);
container.innerHTML = content;
}
</script>
<!-- Email 1 Content -->
<script ="text/javascript">
var content = '<div class="test">Email 1 content</div>';
ReplaceContentInContainer('Email1',content);
}
</script>
<!-- Email 2 Content -->
<script ="text/javascript">
var content = '<div class="test">Email 2 content</div>';
ReplaceContentInContainer('Email2',content);
}
</script>
Any ideas what I've done wrong that is causing it not to work?

Rather than inserting the element as text into innerHTML create a DOM element, and append it manually like so:
var obj = document.createElement("div");
obj.innerText = "Email 2 content";
obj.className = "test"
document.getElementById("email").appendChild(obj);
See this working here: http://jsfiddle.net/BE8Xa/1/
EDIT
Interesting reading to help you decide if you want to use innerHTML or appendChild:
"innerHTML += ..." vs "appendChild(txtNode)"

The ReplaceContentInContainer calls specify ID's which are not present, the only ID is Email and also, how are the two scripts called, if they are in the same apge like in the example the second (with a corrected ID) would always overwrite the first and also you declare the content variable twice which is not permitted, multiple script blocks in a page share the same global namespace so any global variables has to be named uniquely.

David's on the money as to why your DOM script isn't working: there's only an 'Email' id out there, but you're referencing 'Email1' and 'Email2'.
As for grabbing the content parameter from the query string:
var content = (location.search.split(/&*content=/)[1] || '').split(/&/)[0];

I noticed you are putting a closing "}" after you call "ReplaceContentInContainer". I don't know if that is your complete problem but it would definitely cause the javascript not to parse correctly. Remove the closing "}".
With the closing "}", you are closing a block of code you never opened.

First of all, parse the query string data to find the desired content to show. To achieve this, add this function to your page:
<script type="text/javascript">
function ParseQueryString() {
var result = new Array();
var strQS = window.location.href;
var index = strQS.indexOf("?");
if (index > 0) {
var temp = strQS.split("?");
var arrData = temp[1].split("&");
for (var i = 0; i < arrData.length; i++) {
temp = arrData[i].split("=");
var key = temp[0];
var value = temp.length > 0 ? temp[1] : "";
result[key] = value;
}
}
return result;
}
</script>
Second step, have all possible DIV elements in the page, initially hidden using display: none; CSS, like this:
<div id="Email1" style="display: none;">Email 1 Content</div>
<div id="Email2" style="display: none;">Email 2 Content</div>
...
Third and final step, in the page load (after all DIV elements are loaded including the placeholder) read the query string, and if content is given, put the contents of the desired DIV into the "main" div.. here is the required code:
window.onload = function WindowLoad() {
var QS = ParseQueryString();
var contentId = QS["content"];
if (contentId) {
var source = document.getElementById(contentId);
if (source) {
var target = document.getElementById("Email");
target.innerHTML = source.innerHTML;
}
}
}

How about this? Hacky but works...
<!-- ORIGINAL DIV -->
<div id="Email"></div>
<script type="text/javascript">
function ReplaceContentInContainer(id,content) {
var container = document.getElementById(id);
var txt = document.createTextNode(content);
container.appendChild(txt);
}
window.onload = function() {
var args = document.location.search.substr(1, document.location.search.length).split('&');
var key_value = args[0].split('=');
ReplaceContentInContainer('Email', key_value[1]);
}
</script>

Related

I am using TypeForm and need to autofill hidden fields from a .js script

I am using TypeForm and need to autofill utm fields from javascript, everything works except I cant get the html created from the script to show on the page. I am embedding the below code in a html/js module in a clickfunnels page. Any help is very much appreciated.
<div id="typeform"></div>
<script>
//<div id="typeform"></div> <div id="row--27712"></div>
window.onload = function(){
var source = "utm_source=1";
var medium = "utm_medium=2";
var campaign = "utm_campaign=3";
var content = "utm_content=4";
var keyword = "utm_term=5"
var HTMLA = '<div data-tf-widget="mYH43Dz4" data-tf-iframe-props="title=TFS - ANALYTICSDEV V1.1" data-tf-medium="snippet" data-tf-hidden=';
var HTMLquote = '"';
var HTMLcomma = ',';
var HTMLB = '" style="width:100%;height:600px;"></div><script src="//embed.typeform.com/next/embed.js">';
var HTMLC = '</'
var HTMLD = 'script>'
var form = HTMLA.concat(HTMLquote).concat(source).concat(HTMLcomma).concat(medium).concat(HTMLcomma).concat(campaign).concat(HTMLcomma).concat(content).concat(HTMLcomma).concat(keyword).concat(HTMLB);
var form2 = form.replaceAll("undefined","");
document.getEIementById('typeform').innerHTML = form2;
};
</script>
You can pass custom values to hidden fields like this:
<div id="typeform"></div>
<link rel="stylesheet" href="//embed.typeform.com/next/css/widget.css" />
<script src="//embed.typeform.com/next/embed.js"></script>
<script>
var source = '1';
var medium = '2';
var campaign = '3';
var content = '4';
var keyword = '5';
window.tf.createWidget('mYH43Dz4', {
container: document.getElementById('typeform'),
hidden: {
utm_source: source,
utm_medium: medium,
utm_campaign: campaign,
utm_content: content,
utm_term: keyword
}
});
</script>
In case you already have those values in your host page URL, you could use transitive search params feature:
<div
data-tf-widget="mYH43Dz4"
data-tf-transitive-search-params="utm_source,utm_medium,utm_campaign,utm_content,utm_term"
></div>
<script src="//embed.typeform.com/next/embed.js"></script>
Your code does not work because you are adding script tag via innerHTML. This script tag will not execute for security purposes:
https://developer.mozilla.org/en-US/docs/Web/API/Element/innerHTML#security_considerations
https://www.w3.org/TR/2008/WD-html5-20080610/dom.html#innerhtml0

How to apply CSS by URL Parameters? Hide div by URL

How can I hide a div by ID / Class using a parameter in the URL?
For example site.com/?divID=hide
Or disable a specific CSS to act another. But it had to be through the URL: /
var getParams = function() {
var url = window.location
var params = {};
var parser = document.createElement('a');
parser.href = url;
var query = parser.search.substring(1);
var vars = query.split('&');
for (var i = 0; i < vars.length; i++) {
var pair = vars[i].split('=');
params[pair[0]] = decodeURIComponent(pair[1]);
}
return params
}
var urlParams= getParams();
You will get URL params in "urlParams" object and use that "urlParams[divID]" to get the details of URL params and apply CSS using jQuery/js .
Here is the syntax of jQuery to apply CSS
https://www.w3schools.com/jquery/jquery_css.asp
Here is the syntax of js to apply CSS
https://www.w3schools.com/js/js_htmldom_css.asp
In HTML, you can hide any element you want by giving it the hidden parameter.
<div class="container" hidden> *content* </div>
This will hide the div and it's content.
If you wanted to do it using PHP, you could do the following: (assuming your URL is site.com?hide)
<?php
$hide = isset($_GET['hide']); //this returns a boolean value
?>
<body>
<div <?= $hide ? "hidden":""?> > *content* </div>
</body>
What <?= $hide ? "hidden":""?> does is basically, if the GET parameter hide is set, will print in your HTML (inside your div tag) the word 'hidden', which will make your div invisible.

JS exstract part of URL from multiple form fields

I have a form that has multiple fields all with the same class. These are populated with URL's that follow the same structure. I am trying to extract the same section from each URL. So far var res = x.split('/')[5]; will achieve this but only for the first URL. I can also use var x = document.querySelectorAll(".example") to change all the url's but I cannot find the correct way to combine both of these function. so far my code looks like this:
script>
function myFunction() {
var x = document.querySelectorAll(".example").innerHTML;
var res = x.split('/')[5];
var i;
for (i = 0; i < x.length; i++) {
x[i].innerHTML = res;
}
}
</script>
I have looked around but can't find a solution that fits. Thanks in advance for your help.
So loop over the HTML Collection, this is making assumptions based on code.
// Find all the elements
var elems = document.querySelectorAll(".example")
// loop over the collection
elems.forEach(function (elem) {
// reference the text of the element and split it
var txt = elem.innerHTML.split("/")[5]
// replace the text
elem.innerHTML = txt
})
<div class="example">1/2/3/4/5/a</div>
<div class="example">1/2/3/4/5/b</div>
<div class="example">1/2/3/4/5/c</div>
<div class="example">1/2/3/4/5/d</div>
<div class="example">1/2/3/4/5/e</div>
<div class="example">1/2/3/4/5/f</div>

Deleting the last Element in a Div [JavaScript]

I'm having a strange problem. I'm trying to make a program that will add and delete div's inside another div called "body". To add divs, I use document.getElementById("body").innerHTML. Adding works fine. However, in the deleting function, I replace the "body" id with a variable with the id of the div that will be deleted. But when I run the code, I get the error "cannot set innerHTML of null". I tried to replace the id variable with a fixed local variable, and it worked fine. I also tried to add quotes to the variable but that didn't work either. Is there any reason why I can't set the id to a changing variable? Thanks.
Here is my code:
var i = 1;
function myFunction() {
var addDiv = document.getElementById("body2");
addDiv.innerHTML += "<div id = '" + i + "'><br><textarea id = '1' > foo < /textarea></div > ";
i++;
}
function myFunction2() {
var deleteDiv = document.getElementById(i);
deleteDiv.innerHTML = "";
i--;
}
<div id="body2">
<div id="0">
<textarea id="text">lol</textarea><button onclick="myFunction()">Add</button>
<button onclick="myFunction2()">Delete</button>
</div>
</div>
you are incrementing i after adding a div so you must use i-1 while deleting to get correct id.
var i = 1;
function myFunction() {
var addDiv = document.getElementById("body2");
addDiv.innerHTML += "<div id = '"+i+"'><br><textarea id = '1'>foo</textarea></div>";
i++;
}
function myFunction2() {
var deleteDiv = document.getElementById(i-1);
deleteDiv.remove();
i--;
}
<div id = "body2">
<div id = "0">
<textarea id = "text">lol</textarea><button onclick =
"myFunction()">Add</button>
<button onclick = "myFunction2()">Delete</button>
</div>
</div>
To remove last child, you can even use CSS selector last-child. You should also add specific class to newly added divs as you would want to remove only newly added divs.
This will also remove dependency of i.
As an addon, you can also use document.createElement + Node.appendChild instead of setting innerHTML. .innerHTMl will be expensive for highly nested structure.
function myFunction() {
document.getElementById("body2").appendChild(getDiv());
}
function getDiv(i){
var div = document.createElement('div');
div.classList.add('inner')
var ta = document.createElement('textarea');
ta.textContent = 'foo';
div.appendChild(ta);
return div;
}
function myFunction2() {
var div = document.querySelector('#body2 div.inner:last-child')
div && div.remove()
}
<div id="body2">
<div id="0">
<textarea id="text">lol</textarea><button onclick="myFunction()">Add</button>
<button onclick="myFunction2()">Delete</button>
</div>
</div>
You can refer "innerHTML += ..." vs "appendChild(txtNode)" for more information.

Javascript text file reader doesnt work the first time

I got a webpage with some homemade search engine which is supposed to look for some data in a server-side text file. I use JS to parse this file, it works well except for the very 1st time I use it... The culprit seems to be my fetchText() function which doesnt return anything the first time. Note that if I add a alert() inside the fetchText() it works correctly (see note in JS source code). I guess the IFRAME is not fully loaded or something. What can I do ?
Webpage code
<form style="margin-top:15px; margin-left:15px;width:200px;">
<input type="text" value="NGR_" id="srcTxtInput" style="margin-top:0px;margin-left:0px;width:100px;"/>
<input type="button" value="Go" onclick="SearchString('./Coordinates.txt')" />
</form>
<div id="searchResults" style="vertical-align:right;margin-top:25px;">
<select size="4" id="select_list" onchange="Selec_change();" ondblclick="Selec_change();" style="visibility: hidden; width:250px;margin-left:8px;" ></select>
<img id="closeImg" src="./close.png" height="15px" width="15px" style="opacity:0.5;visibility:hidden; margin-left:235px;margin-bottom:5px;margin-top:5px;vertical-align:top;" alt="Close results" title="Close results" onclick="HideSearch();" onmouseover="this.style.cursor='pointer';"/>
</div>
JS code
function SearchString(txtFile){
var slist = document.getElementById('select_list');
var str = trim(document.getElementById('srcTxtInput').value.toUpperCase());
if(str == "" ){
slist.options.length = 0; //empty list
HideSearch();
exit;
}
var txt = fetchText(txtFile);
//DO SOMETHING
}
function fetchText(txtFile) {
var d = document;
var txtFrame = d.getElementById('textReader');
txtFrame.src = txtFile;
**//Note that if I add *alert(txtFrame.src)* here the function works the 1st time**
var text = '';
if (txtFrame.contentDocument) {
var d = txtFrame.contentDocument;
text = d.getElementsByTagName( 'BODY')[ 0].innerHTML;
}
else if (txtFrame.contentWindow) {
var w = txtFrame.contentWindow;
text = w.document.body.innerHTML;
}
return text;
}
Since loading page content like that is an asynchronous operation, you can't expect the contents to be there immediately after setting the "src" attribute of your <iframe>. You'll have to put the code that searches through the text in a "load" event handler on the frame document.
That means you'll write something like:
fetchText(textFile, function(theText) {
// DO SOMETHING
});
and modify "fetchText()" to be more like this:
function fetchText(txtFile, whenLoaded) {
var d = document;
var txtFrame = d.getElementById('textReader');
txtFrame.onload = function() {
var text = '';
if (txtFrame.contentDocument) {
var d = txtFrame.contentDocument;
text = d.getElementsByTagName( 'BODY')[ 0].innerHTML;
}
else if (txtFrame.contentWindow) {
var w = txtFrame.contentWindow;
text = w.document.body.innerHTML;
}
whenLoaded(text);
};
txtFrame.src = txtFile;
}

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