Countdown until date with jpeg/svgs

I would love to make/use a javascript which counts down until a certain date.

(example: the 1th of sept)

What should it do?

This script should delete an image jpeg or svg (10px x 10px) daily. So the script should have the amount of days in pictures left.

(example: 29 days left so 29 pictures on the website, tomorrow 28 pictures, day after 27 pictures)

Does anyone know a code that would allow this kind of a “daily update” to happen automatically?
Any help would be very much appreciated!

Source: stackoverflow-javascript

Limit camera rotation on the Y axis

I am using JSModeler to display OBJ files. It internally uses THREE.JS and creates a PerspectiveCamera. What I need is to limit the movement of the camera on the Y axis so not to go underneath the object. I know how to do this with THREE.OrbitControls but this doesn’t work with JSModeler. Is there a way to directly control the camera movement? Thanks.

Source: stackoverflow-javascript

Reactjs function firing twice?

Hi i try to learn Reactjs, and want to do a simple Caeser-En/Decryption (shifting characters).

It works fine when the Inputtext is changeing, but it seems that if the encryption-key is changeing (updateRot()), the CaeserShift-function fires twice (or even more often?).

But i can’t figure out what i’m doing wrong.

class MarkdownEditor extends React.Component {
  constructor(props) {
    this.handleChange = this.handleChange.bind(this);
    this.updateRot = this.updateRot.bind(this);
    this.state = {value: 'abcdefghijklmnopqrstuvwxyz',
                  rot: 1

caesarShift(str, amount){

	var output = '';
	// Go through each character
	for (var i = 0; i < str.length; i ++) {

		// Get the character we'll be appending
		var c = str[i];

		// If it's a letter...
		if (c.match(/[a-z]/i)) {

			// Get its code
			var code = str.charCodeAt(i);
			// Uppercase letters
			if ((code >= 65) && (code <= 90))
				c = String.fromCharCode(((code - 65 + amount) % 26) + 65);

			// Lowercase letters
			else if ((code >= 97) && (code <= 122))
				c = String.fromCharCode(((code - 97 + amount) % 26) + 97);
		// Append
		output += c;
	// All done!
  return output

  render() {
    return (