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>
I wanted to make a javascript loop in html like the following:
( if (var i=0; i<10; i++) { ) //<-- JAVASCRIPT
//HTML
( } ) //<-- JAVASCRIPT
I tried using the <% JAVASCRIPT %> but it won't work for me. Does anyone know who to solve this?
Thanks in advance.
This is not how javascript works. This is something you would do with PHP.
With javascript, you run it seperately from the html. Then, you create an element within your html as a wrapper to put the javascript generated html into. Like so:
HTML
<div id="myHTMLWrapper">
</div>
<script>
var wrapper = document.getElementById("myHTMLWrapper");
var myHTML = '<span class="test">Testing out my script!</span>';
wrapper.innerHTML = myHTML
</script>
See a working example here
Sorry I skipped over the for loop by the way. Let me fix it with this update... You could do it like this, you see:
<script>
var wrapper = document.getElementById("myHTMLWrapper");
var myHTML = '';
for (var i = 0; i < 10; i++) {
myHTML += '<span class="test">Testing out my script! loop #' + (i + 1) + '</span><br/><br/>';
}
wrapper.innerHTML = myHTML
</script>
for loops are control flow and thus cannot be inserted into a static context. Try mapping it, e.g.
`<html>` + data.map(function(a) { return `<div>${a}</div>` }).join('') + `</html>`
<script>
for(var i=0; i<10; i++) {
//Code here
}
</script>
https://www.w3schools.com/js/js_if_else.asp
https://www.w3schools.com/js/js_loop_for.asp
I'd suggest you read a bit before going straight into coding
Either way your script seems deficient and I cant make out what you are trying to do with it.
Check these links if you want to append elements:
https://www.w3schools.com/jquery/html_append.asp
https://www.w3schools.com/jsref/met_node_appendchild.asp
I have a confusing problem where a line of code in my function is running before a loop which is stated above it. In my HTML I have:
<textarea id="textBox"></textarea>
<button id="submitButton" onclick="parseData()">submit</button>
<div id="put"></div>
And my JS function is:
function parseData() {
var data = $("#textBox").val();
var tab = /\t/;
data = data.split(tab);
$("#put").html($("#put").html() + "<table>");
for (var i = 0; i < data.length; i++) {
$("#put").html($("#put").html() + "<tr>"+data[i]+"</tr>");
};
$("#put").html($("#put").html() + "</table>");
return;
};
The resulting html in $("#put") is this:
<table></table>
"SiO2 (%)Al2O3 (%)TiO2 (%)CaO2 (%)MgO2 (%) 8.21.25.31.51.8 45.32.52.60.210.5 65.23.48.70.0662.3 20.11.85.42.540.2 18.91.12.34.810.7"
I'm not sure why the final </table> is being placed before the for loop runs, and I'm not sure why the <tr> tags aren't being added within the for loop. Any pointers?
jQuery automatically closes up tags upon insertion. Try this.
function parseData() {
var data = $("#textBox").val();
var tab = /\t/;
var put_html = $("#put").html() + "<table>";
data = data.split(tab);
for (var i = 0; i < data.length; i++) {
put_html += "<tr>"+data[i]+"</tr>";
};
put_html += '</table>';
$("#put").html(put_html);
return;
};
However, I notice that you aren't using <td> elements. You might want to look into fixing that too.
Every time you are adding content into the html() property rather than building the entire content and adding it.
Since you are using jQuery you can bind the event using jQuery rather than adding that directly in the HTML
<textarea id="textBox"></textarea>
<button id="submitButton">submit</button>
<div id="put"></div>
$(function(){
$("#submitButton").click(function(){
parseData();
});
function parseData() {
var data = $("#textBox").val();
var tab = /\t/;
data = data.split(tab);
// Build your html
$("#put").html('htmlstructure');
return;
}
});
Also you can look for something similar like concatenating the string in an array so that you don't create string isntances each time when you append, since strings are immutable.
Good example
I am working on a website where I dont have any control on the code (functionality side. however even if I had the access I wouldn't be able to make any changes as I am a front end designer not a coder..lol). The only changes I can make is CSS, js.
What I am tring to do:
I got the url on the page like this:
www.test.com/#box1#box3#box5
(I am not sure if I can have more than one ID in a row. please advice. However thats how the developer has done it and I dont mind as there are no issues yet)
the page html
<div id="box1"></div>
<div id="box2"></div>
<div id="box3"></div>
<div id="box4"></div>
<div id="box5"></div>
I would like to take different ids from the URl and use it to hidhlight the divs with that ID (by addding a class name "highlight")
The result should be like this:
<div id="box1 highlight"></div>
<div id="box2"></div>
<div id="box3 highlight"></div>
<div id="box4"></div>
<div id="box5 highlight"></div>
I would like to learn the smart way of taking just the id numbers from the url and use it to select the div with that paticulat no.
just a quick explanation:
var GetID = (get the id from the URL)
$('#box' + GetID).addClass('highlight');
Try This...
var hashes =location.hash.split('#');
hashes.reverse().pop();
$.each(hashes , function (i, id) {
$('#'+id).addClass('highlight');
});
Working fiddle here
var ids = window.location.hash.split('#').join(',#').slice(1);
jQuery(ids).addClass('highlight');
or in plain JS:
var divs = document.querySelectorAll(ids);
[].forEach.call(divs, function(div) {
div.className = 'highlight';
});
There are various way to resolve this issue in JavaScript. Best is to use "split()" method and get an array of hash(es).
var substr = ['box1','box2']
// Plain JavaScript
for (var i = 0; i < substr.length; ++i) {
document.getElementById(substr[i]).className = "highlight"
}
//For Each
substr.forEach(function(item) {
$('#' + item).addClass('highlight')
});
//Generic loop:
for (var i = 0; i < substr.length; ++i) {
$('#' + substr[i]).addClass('highlight')
}
Fiddle - http://jsfiddle.net/ylokesh/vjk7wvxq/
Updated Fiddle with provided markup and added plain javascript solution as well -
http://jsfiddle.net/ylokesh/vjk7wvxq/1/
var x = location.hash;
var hashes = x.split('#');
for(var i=0; i< hashes.length; i++){
var GetID = hashes[i];
//with jQuery
$('#box' + GetID).addClass('highlight');
//with Javascript
document.getElementById('box' + GetID).className = document.getElementById('box' + GetID).className + ' highlight';
}
<html>
<body>
<script type="text/javascript">
var key = [["q","w","e","r","t","y","u","i","o","p"], ["a","s","d","f","g","h","j","k","l"], ["z","x","c","v","b","n","m"]];
</script>
<table>
<tr>
<td><input type = 'button' value = "key[0][1]" /></td>;
</tr>
</table>
</body>
</html>
This is a small example above, but I'm basically making an onscreen keyboard and I already have the loop which positions the buttons, however in my loop I try to assign the value of each key similarly to the code above, but instead of printing q w e r t y for each key, it prints key[row][col] for each button. How do I get the letters to appear on the button using a similar method to the above?
The below code generates the keyboard kind of layout that you are expecting:
<html>
<head>
<script type="text/javascript">
var key = [["q","w","e","r","t","y","u","i","o","p"], ["a","s","d","f","g","h","j","k","l"], ["z","x","c","v","b","n","m"]];
</script>
<body>
<script type="text/javascript">
for(var i = 0; i < key.length; i++)
{
document.write("<div>");
for(var j = 0; j < key[i].length; j++)
{
document.write("<input type='button' value='" + key[i][j] + "'/>");
}
document.write("</div>");
}
</script>
</body>
</html>
The only thing the second and third row should move right a little bit to look like real keyboard. For this we can do padding for the div tags. Hope this helps you.
Something like this?
HTML:
<input id="myInput" type="button" />
JavaScript:
var key = [["q","w","e","r","t","y","u","i","o","p"], ["a","s","d","f","g","h","j","k","l"], ["z","x","c","v","b","n","m"]];
var input = document.getElementById('myInput');
input.value = key[0][1];
That's the basic idea. You already have a loop to work with. The javascript should be after the HTML on the page. Your elements need to exist before you can grab them. Not sure if this is your precise confusion, though.
You can use javascript to create the elements, but unless there's a reason to do so, you might as well write HTML. If you're using a javascript function to generate the elements as well as fill their values in, you'll need javascript's document.createElement:
var keysArr = [["q","w","e","r","t","y","u","i","o","p"], ["a","s","d","f","g","h","j","k","l"], ["z","x","c","v","b","n","m"]];
var generateKeys = function(keys) {
for (var i = 0 ; i < keys.length ; i++) {
for (var j = 0 ; j < keys[i].length ; j++) {
var input = document.createElement('input');
input.value = key[i][j];
document.appendChild(input); // or put it wherever you need to.
}
}
}
generateKeys(keysArr);
Wrapping it in a function will also allow you to re-use the code with different keyboard layouts if you wanted to, say, let the user choose a different layout on the fly.
You will need to set them programmatically, rather than in the value attribute.
You will also need to create the tr/td/input elements within your loop programmatically, for example:
http://www.dustindiaz.com/add-and-remove-html-elements-dynamically-with-javascript/
When you create the input tag programmatically, you can set the value attribute using javascript - eg.
newInput.setAttribute("value", key[rowIndex, cellindex]);