fade in and out elements on scroll - css js html

React - Use State to Toggle an Element

Mastering React State: Toggling Elements with Confidence React's state management system is a powerful tool for building dynamic and interactive user interfaces. One common use case involves to..

Bind 'this' to a Class Method

Binding 'this' to Class Methods in React React class components allow you to define custom methods alongside managing state and props. These methods often need to access component properties li..

error Warning: getimagesize(uploads/583517f49099a.jpg): failed to open stream: No such file or directory in SimpleImage.php on line 1198

i think this error is just caused by a missing file. But there should be some kind of error checking here to not crash the whole site just due to a missing image file. this error is quite hard to fin..

chart js line chart dont show below 0 and add axis labels

Now we take the chart js chart and add some axis labels on x and y using the same options values. This will also add axis labels to the chart on the x and y axis Javascript options: { scales: {..

chart js line chart dont show below 0

had an issue where the chart was displaying values in the negative, and wanted to start the chart at 0 and no go below. the additional option fixed this issue.  Javascript options: { scales..

Simple Line chart with Chart.js

a nice simple line chart example with fill using chart.js

Random User Profile Loading Script in vue

uses the random user ui here to generate profile boxes using vue js  original script here: https://codepen.io/l-i-lc/pen/WNxNwvd?editors=1010   

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..

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..

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;

Testing Playwrite on for Node

I came across this library on y news, and thought id give it a bit of a test.  I managed to get it working but not really sure what tests it can do.  I set it to take a screen shot of a we..

Create Strings using Template Literals

if you use the backtick to enclose your strings you no longer have to use \n for a new line.  For example: `this is a multiline ...string!!` Console Example

Use destructuring assignment within the argument to the function half to send only max and min inside the function.

this seems like a tricky one, can be resolved with removing the stats array reference. Im not sure how it still knows to access the stats array. I dont know how that is correct as the console just lo..

Using Destructuring and the Rest Parameter to Reassign Array Elements

Use destructuring assignment with the rest parameter to perform an effective Array.prototype.slice() so that arr is a sub-array of the original array source with the firs..

Use destructuring assignment to swap the values of a and b

Use destructuring assignment to swap the values of a and b so that a receives the value stored in b, and b receives the value stored in a. I was havi..

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. 

load json data url with jquery

loads a api or json url or endpoint using jquery and console logs the result Tested working on my test json file, check the console and it should be there. 

Using props with Stateless Functional Components in React

Here is an example of a Stateless Functional Component but i cant get the PropTypes working correctly in my demo, not sure what im doing wrong here, but the code seems to work in the compiler just not..

How to Access Props Using this.props in React

If you would like to access a class component prop within its self you can do this using the this keyword.

How to Use PropTypes to Define Props in React

React allows you to define the types of props given to your components to make sure that invalid data is not sent as the prop to the element.  To do this you can define propTypes. You can defin..

How to Override Default Props in React

The following code explains how you can override the default props in react.  In this example the default of quantity is set to 0, so we can pass in quantity in the items to override its default..

How to use default props in React

If you dont want to specify props every time you use an element, you can also specify defaults for these items. This can also be useful to remember which props are needed per component. This can be a..

How to Pass an Array as Props in React

If you need to pass larger amounts of information to a component you can pass in an array rather than just a single variable. More information on the join method on the array can be found here. Here..

How to Pass Props to a Stateless Functional Component in React

Props are like properties that you can pass into a component in react. A prop would be something like this in your component.  JSX <div>  <MyProp id="1234" /></div> The..

How to Write a React Component from Scratch

Just testing my react component writing skills...

How to Render a React Class Component to the DOM

This shows how you can get react to render a component into the page or DOM. So actually getting and showing the code that you have been writing in react. 

How to Compose React Components in React

In this code we nest the components NonCitrus and Citrus into the Fruits Component. Then nest the Fruits within the TypesOfFood component.  Also added the additional components, Vegetables, Non..

How to Use React to Render Nested Components

It can be useful to take components and render them inside other components while still making them into seperate items. This shows how you can take each component and nest it within another one and ..

How to Create a Component with Composition in React

This shows how you can compose multiple React components together. In this example we return the parent component which has within it the child component, you can add as many child components as requ..

How to Create a React Component using the ES6 class method

One way to add a react component is to use the Stateless Functional Component method, and another way is to use the ES6 extends syntax. This method seems more complex than the 1st for some reason mayb..

What is a Stateless Functional Component in React

What is a Stateless Functional Component? A stateless component is one that can recive data and render it, but it does not manage the provided data or track changes to it.  This method creates ..

How do Self-Closing JSX Tags Work?

So in JSX all the tags must be closed, other wise it can break the element. for example: <div> must have a closing </div> and also for elements like <br> and <hr> must include..

How to Define a HTML Class in JSX in React

When writing JSX you cant add classes like you would in HTML so this code would not work: JSX <div class="my-class"></div> Instead we have to use className. JSX uses camel case for a l..

How to Render HTML Elements to the DOM with React

Once you have a JSX element defined you can write it to the page with ReactDOM.render(componentToRender, targetNode),  In this example we are targeting the div with the id challenge-node. JSX ..

How to Add Comments in JSX

To put comments inside JSX, you use the syntax {/* */} to wrap around the comment text. You do actually need the curley brackets, and have to add it under the other elements for this to wor..

Create a Complex JSX Element

JSX must return a single element, so you must wrap your items in a div element you cant just return a bunch of p tags.  Define a new constant JSX that renders a div which con..

Create a Simple JSX Element

The current code uses JSX to assign a div element to the constant JSX. Replace the div with an h1 element and add the text Hello JSX! inside it.

adding react with JSX using babel

just wanted to see how JSX would work with react and babel, so this way you can write JSX and babel compiles it for use with react.  This is apparently not a good way to do things and can be qui..

adding react to a website in 3 steps

i was just researching how to add react to a website, and i thought i would need babel to translate or compile the JSX code, but apparently you do not need this...  So ill test this here and see..

using babel for react compiling in browser

this is currently just an idea, as i saw that codepen uses babel to run react i was wondering i can do the same thing here and then just write normal react script and have babel compile it.  so ..

react hello world with time and date updating

here is a react hello world with the date and time updating on setInterval 1000 miliseconds.  Again with react it has to be compiled from JSX for it to work, so i have included the original and ..

react hello world with variable name

i was just testing some of the hello world examples on the react site, and as they use JSX they cant be directly entered into your code, so you need to run a pre compiler (not sure of the exact term f..

php html template class system

just a simple php templating system to extract your html files from within the php code into external files, makes things (or your code) a bit neater.

using clamp js to clamp lines of text

there is a css version of this as well but this version works in a greater range of browsers (i think) this one is not working for me... i think the overflow elipsis is still a better option than thi..

get current url with php

this checks is $_SERVER['HTTPS'] is set and $_SERVER['HTTP_HOST'] $_SERVER['REQUEST_URI'] to construct the current url

replacement slider for ken wheeler's slick carousel tiny slider 2 [testing]

I have been looking for a little while for a replacement for the now classic and a bit depreciated, ken wheeler's slick carousel. After a bit of looking around i think the best replacement, is a non ..

darkmode toggle switch with local storage to remember the last selection

Here is a darkmode toggle switch, that swaps out the body class so you can target dark-mode or light-mode on all your elements! It saves to local storage the last selection so if you come back to the..

Monitoring Visible Objects on Screen

i found this one when researching how to detect visible objects on screen, and then doing something with them. This one does not use any external scripts to change the box colour as it becomes visible..

css using perspective for transforms

just playing around with the perspective and transforms, it does weird and annoying things to the margins. I was interested in how this page worked, so i thought i would try and deconstruct it a bit. ..

Changing an array declared with const

a const means that you cannot re-declare the variable name, but you can still mutate an array content that is declared as a const. so you can see in the following example that even though the array is..

using let and const example

This example uses let and const rather than just vars, let can only be declaired once rather than overwritten like vars and const is a read only variable so it cant be changed. 

getType function for js

this function returns the type of item, array object string number etc

page load timer class

usage: $page_timer = new page_timer; // at the start of your code echo $page_timer->end(); // at the end of your code.

emoji data - version 1.0

  Emoji Data version 1.0 This is a better emoji list that you can search by title ctrl + f emoji-data.txt # Emoji Data for UTR #51 # # File: emoji-data.txt # Version: 1.0 # Date: 20..

make your images look non squished when not using image backgrounds

Update: Fixed the code, you can see it here.  i deal with a lot of sites where they have a bunch of images listed and sometimes they can end up looking a bit sqashed unless you add a div and set..