Animation de texte avec glitches

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let iterations = options.iterations;

setTimeout(() => {
        if (iterations >= 0) {
          const nextOptions = Object.assign({}, options, {iterations: iterations - 1});

// Ensures partialString without the random character as the final state.
          if (iterations === 0) {
            element.textContent = partialString;
          } else {
            // Replaces the last character of partialString with a random character
            element.textContent = partialString.substring(0, partialString.length - 1) + randomCharacter(characters);
          }

doRandomiserEffect(nextOptions, callback)
        } else if (typeof callback === "function") {
          callback(); 
        }
      }, options.timeout);
    };
    
    function doResolverEffect(options, callback) {
      const resolveString = options.resolveString;
      const characters = options.characters;
      const offset = options.offset;
      const partialString = resolveString.substring(0, offset);
      const combinedOptions = Object.assign({}, options, {partialString: partialString});

doRandomiserEffect(combinedOptions, () => {
        const nextOptions = Object.assign({}, options, {offset: offset + 1});

if (offset <= resolveString.length) {
          doResolverEffect(nextOptions, callback);
        } else if (typeof callback === "function") {
          callback();
        }
      });
    };

doResolverEffect(combinedOptions, callback);
  } 
}

const strings = [
  'WebLeb',
  'Order A Website Now',
  'Download Free Code',
  'Read Articles',
  'And Many More...'
];

let counter = 0;

const options = {
  // Initial position
  offset: 0,
  // Timeout between each random character
  timeout: 5,
  // Number of random characters to show
  iterations: 10,
  // Random characters to pick from
  characters: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'y', 'x', '#', '%', '&', '-', '+', '_', '?', '/', '\\', '='],
  // String to resolve
  resolveString: strings[counter],
  // The element
  element: document.querySelector('[data-target-resolver]')
}

// Callback function when resolve completes
function callback() {
  setTimeout(() => {
    counter ++;
    
    if (counter >= strings.length) {
      counter = 0;
    }
    
    let nextOptions = Object.assign({}, options, {resolveString: strings[counter]});
    resolver.resolve(nextOptions, callback);
  }, 1000);
}

resolver.resolve(options, callback);