Locate a DIV and CLASS and create an IMAGE element using JAVASCRIPT

I had this weird request the other day, well today to replace an image thumbnail that was generated by an aspx script, but the link was from youtube and the list was not auto loading the thumbnail.&nb..

reload window automatically with javascript

script to reload the window automatically the same as pressing the reload button on the browser so there may still be cache issues when reloading this you can change the 5000 to another value to chan..

get current year in javascript

get and display the current year using javascript. a usage example would be adding the current year as a copyright to the footer of a page

find a text string and replace it in javascript

There is a function in javascript called replace. You can just give it some text and it should replace it with your target text.  For example #1 this just runs and replaces the first instance o..

check if an item id exists in javascript

checks if 2 ids exist in one function and console logs the status here is the result in console log

Twitter Post Fetcher v18.0.4 - javascript twitter feed fetcher

A few queries showing how to get latest tweets and post likes using the Twitter Post Fetcher v18.0.4 script.

Are you sure you want to navigate away from this page? #JavaScript warning

You only need to include one of these scripts as the top one seems to work fine by its self not requiring any jquery. Javascript window.onbeforeunload = function (e) { return "You..

share to twitter javascript button function open a new window

gets and encodes the current page url and opens a new window to share the link to twitter

share to linked in current url button with javascript

Share the current page url to linked in with a button and javascript

encode url with javascript

get the current url, encode it and log the encoded result to console

Javascript Objects Notes

As javascript objects are used so often in javascript i thought i would write an overview and some notes on how they work, well how they work for me anyway. I guess how they work for me should be simi..

javascript add class to element

how to add a class to an element in raw javascript I wrote a quick demo here showing how you can add a class to an element with an id on a button click

update value of element using javascript

using innerHTML to update the value of an element

javascript attach a click event to an id not using jquery

I just wanted to bind a click to a button, not using JQuery, turns out its not that hard at all. Why am i using jquery for this stuff???...

how to write a javascript string over multiple lines

i remember learning this on freecodecamp while doing the ES6 training, and i could not remember exactly how to do it.  I was using the \ at the end of each line but thats really a bit annoying.&..

best way to write html into an existing page javascript

this probably isnt the "best way" but it is a way that works. say you want to add some elements to a page with javascript this is a method to do it.  Add an element, before including the script..

check url hash using javascript

What is a url hash? This is a URL Hash. You can add the # symbol on the end of a url and content after it, and this will not effect the content usually, unless the browser is intructed to do somet..

submit form with javascript

if you have a form with an id, you can submit it with the following javascript. usually this will be attached to an event or something similar like a button click.  If i run this on the demo, it..

Converting PHP to Javascript for State Extraction by numeric value Australian State Names

I cant even remember when i originally wrote this php function, but now i need to have it in javascript, should not be much change to it to get it working.  The original function takes an austra..

javascript get content from element

gets the content from a target element with javascript using its id sets the target with the content from element 1 using its innerHTML attribute

convert characters to entities using javascript replace

takes a html string and replaces the html elements into their equivalent characters. e.g: replaces < with &lt;

get tomorrows date with javascript

Same as the get yesterdays date except with a +1 rather than a -1 let tomorrow = new Date(new Date().setDate(new Date().getDate()+1));  

get yesterdays date with javascript

This gets todays date and minuses one day from it to be ... yesterday.  let yesterday = new Date(new Date().setDate(new Date().getDate()-1));console.log(yesterday); This format is the full da..

simple javascript no library accordion

a simple button and div based accordion with a toggled indicator

How to Assign the Value of One Variable to Another in Javascript

Showing a very basic script that assigns the value of the variable a to b and then console log's the object.

javascript random string to put on url for cache

I was having a bit of a cache issue with a external css file, so i thought i might fix this by appending a random query string to the file name. This should force the browser to recheck the file each ..

javascript try catch example function

try catch is a good way to stop errors breaking your javascript. here is the example from the firefox mozilla with a basic try catch logging the error to your console, rather than just breaking all t..

load json data url or api with javascript

this loads a target json url or api using raw javascript so no jquery required with this one then logs the data returned to the console. 

javascript basic test array and loop

Here is just a basic test array and a loop to show a basic loop through the test array.  With the loop i use the length of the array as the max variable, so the loop stops when it hits the array..

how to join an array in javascript using the join method

This example shows how we can join an array into a string using the join method. Its a nice quick way to convert your array into a string with a delimiter such as , or ; Here we can see the test arr..

show the current date in javascript

Returns the current date and time and sets the value in a div.  Also added a demo with setinterval to update the time and date in the div every second. 

get element by id with javascript

gets an element using its id using javascript

console table rather than console log for javascript objects and arrays

so i just saw on a tweet, that you can use console.table and i cant wait to try it out! good thing i already have a test object and array ready to go!  

change the box-shadow of an element with javascript boxShadow

changes the box shadow of test_div using the javascript object(?) boxShadow

change the background color of an element with javascript

gets the element by its id and changes the background color style css value the following example: gets the element by its id "my_bg" changes the style.backgroundColor to #123456

adding a new line in javascript

i was writing a function where i needed to for ease of readability add a new line to the code, you can do this with the \n for the new line and then if you need the string to go to the next line then ..

javascript update item in object

find something in a javascript array by its array id and then update the value of that item i changed this from an array to an object as i wanted to use something other than numbers for the index Ob..

change the border radius of an element with javascript only

change padding of element with javascript

change the padding of an element with javascript only

get the value from a range input field with javascript

this script will retrieve the current value from a range slider html input if you want the value to only update when the slider interaction has been stopped change the oninput to onchange then it w..

old browser check with javascript

modified from this script i console logged all the items available so you can do what you need with them these are the avilable variables Javascript console.log(browser.agent);console.log(browser...

Scroll down indicator css javascript and html

I have seen these a couple of times, indictating to the user that there is further content down the page, and they should scroll to view it. Then as you scroll down the indicator dissapears. So we w..

show the browsers name in javascript

This function will show you an alert box with the name of your browser, however im using brave at the moment and it shows as Netscape, so i guess you cant trust the result.  Also i just discover..

loop through a complex object json javascript

just a note to say that a complex object is an object with more than one nested object in it for example just kinda playing around with this one to get the handle on objects and how to access them C..

load json with vanilla javascript no jquery

this basically does the same thing that a jquery .getJSON does but without the need for jquery.

check if a checkbox is checked with javascript

checks if the box is checked and returns true or false reusable function that can check if a checkbox is checked or not just pass it the id of the checkbox Javascript Usage check_my_box('check1');

form submit override with javascript

if you need to run some additional checks on a form before submitting it

submit a form with javascript onclick

submit a form with javascript, good if you want to submit a form with a button that is not within that form. the form will require an id

javascript page redirect

this one i cant add a working demo for, due to its nature, but it is working if you remove the comment. combine this with this: https://kruxor.com/view/code/wQUDM/do-something-later-with-settimeout-..

loop through object json javascript

this shows how you can loop through a javascript object using for if you check the console you can see the loop results

set the html of an element javascript

this will set the innerhtml value of an element

minutes to decimal calculator javascript version

trying to do a more simple version of this post. https://kruxor.com/view/code/NIjAQ/quick-tool-to-convert-time-into-decimal/  the php version requires post back to the server, so i think this c..

set maxHeight of element by id with javascript

sets the max height value of an element with javascript demo pending

using javascript to open a link in the same window and in a new window or tab (open link)

a nice easy way to target _self or _blank when opening a link using javascript

country select javascript check which option is selected and show a hidden element

this shows a country dropdown and then if a selected country name is matched it will show the second part of the form for this test australia is the confirmed country

country select javascript check which option is selected

this is an example of how you can get the selected country value with javascript from a html countries dropdown

javascript window.onload

wait for the window to load and then run a function

get element by class name with javascript and change it function

You may have seen the get element by id in javascript, which is great when there is only one element but what if you need to get the element using its class name The issue with classes is that they c..

javascript isset equivalent

i was just looking for an equivalent to the isset in php for javascript, i was initially using .length but this can still cause errors so i found this solution. if (typeof my_var !== 'undefined') {}

use javascript to open a link in a new tab or window

im not sure why you would use this rather than using the html target="_blank" but it could be useful if you needed to open a new tab in a javascript function.

force existing link to open in a new window with javascript

here is some javascript that grabs an existing link and then forces it to open in a new tab when clicked.

split a string into an array using split javascript

this will split the string into an array based on the spaces inbetween words. you can split it based on any character, for example if you had words in csv comma format you could use the second example..

get the current url in javascript

this will get the current address add it to a variable and show it on the result element

Generate Random Whole Numbers with JavaScript Function

generate a random whole number function with test buttons

Generate Random Fractions with JavaScript

generate a random fraction and add it to result when clicking a button

for loop through an array with javascript

looping through an array with javascript using a basic for loop

get the dimensions of an image with javascript

this will show the height and width of an image using javascript

Objects in javascript

creating and using an object in javascript, the full version of this testing is on codepen

document ready javascript standalone version no jquery

this is a version of a dom ready or document ready that does not require jquery

add a class to a div with an id javascript

a one liner to add a class name to an element with a specific id, for this to run it seems to need a document ready.

wordpress register enqueue javascript require jquery

This usually goes in the theme functions file. This will load it after jquery if it requires it. wp_register_script('scriptname', get_template_directory_uri() . '/js/scripts.js', array('jquery'), ..

validate form data using javascript to check required html elements

for use in a javascript function to submit a form var form = document.getElementById('myForm'); for(var i=0; i < form.elements.length; i++){ if(form.elements[i].value === '' && form.elements[i..